./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix001.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix001.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix001.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/mix001.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-76401ed-m [2024-06-20 15:40:25,232 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 15:40:25,271 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 15:40:25,274 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 15:40:25,274 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 15:40:25,288 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 15:40:25,289 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 15:40:25,289 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 15:40:25,289 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 15:40:25,290 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 15:40:25,290 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 15:40:25,290 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 15:40:25,291 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 15:40:25,291 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 15:40:25,291 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 15:40:25,292 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 15:40:25,292 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 15:40:25,292 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 15:40:25,292 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 15:40:25,293 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 15:40:25,293 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 15:40:25,293 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 15:40:25,294 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 15:40:25,294 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 15:40:25,294 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 15:40:25,294 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 15:40:25,294 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 15:40:25,295 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 15:40:25,295 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 15:40:25,295 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 15:40:25,295 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 15:40:25,296 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 15:40:25,296 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 15:40:25,296 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 15:40:25,296 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 15:40:25,297 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 15:40:25,297 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 15:40:25,297 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 15:40:25,297 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 15:40:25,297 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 15:40:25,297 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 15:40:25,298 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 15:40:25,298 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 15:40:25,298 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 15:40:25,470 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 15:40:25,484 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 15:40:25,485 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 15:40:25,486 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 15:40:25,486 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 15:40:25,487 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix001.oepc.i [2024-06-20 15:40:26,433 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 15:40:26,709 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 15:40:26,709 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix001.oepc.i [2024-06-20 15:40:26,737 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbfa3056a/9db6b2aaca7f40d1ba82b75d85cf52d9/FLAG44d233610 [2024-06-20 15:40:26,747 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbfa3056a/9db6b2aaca7f40d1ba82b75d85cf52d9 [2024-06-20 15:40:26,749 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 15:40:26,750 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 15:40:26,751 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix001.oepc.yml/witness.yml [2024-06-20 15:40:26,888 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 15:40:26,889 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 15:40:26,890 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 15:40:26,890 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 15:40:26,894 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 15:40:26,894 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 03:40:26" (1/2) ... [2024-06-20 15:40:26,895 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@297b5af5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:40:26, skipping insertion in model container [2024-06-20 15:40:26,895 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 03:40:26" (1/2) ... [2024-06-20 15:40:26,896 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@735787c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:40:26, skipping insertion in model container [2024-06-20 15:40:26,897 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:40:26" (2/2) ... [2024-06-20 15:40:26,897 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@297b5af5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:40:26, skipping insertion in model container [2024-06-20 15:40:26,897 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:40:26" (2/2) ... [2024-06-20 15:40:26,897 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 15:40:26,985 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 15:40:26,986 INFO L97 edCorrectnessWitness]: Location invariant before [L867-L867] (((((((((((((((((((((! multithreaded || z$r_buff1_thd0 == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) [2024-06-20 15:40:26,986 INFO L97 edCorrectnessWitness]: Location invariant before [L870-L870] (((((((((((((((((((((! multithreaded || z$r_buff1_thd0 == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) [2024-06-20 15:40:26,986 INFO L97 edCorrectnessWitness]: Location invariant before [L869-L869] (((((((((((((((((((((! multithreaded || z$r_buff1_thd0 == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) [2024-06-20 15:40:26,987 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 15:40:26,987 INFO L106 edCorrectnessWitness]: ghost_update [L865-L865] multithreaded = 1; [2024-06-20 15:40:27,023 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 15:40:27,329 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 15:40:27,337 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 15:40:27,466 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 15:40:27,509 INFO L206 MainTranslator]: Completed translation [2024-06-20 15:40:27,510 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:40:27 WrapperNode [2024-06-20 15:40:27,510 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 15:40:27,512 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 15:40:27,512 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 15:40:27,513 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 15:40:27,518 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:40:27" (1/1) ... [2024-06-20 15:40:27,547 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:40:27" (1/1) ... [2024-06-20 15:40:27,584 INFO L138 Inliner]: procedures = 175, calls = 49, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 151 [2024-06-20 15:40:27,586 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 15:40:27,587 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 15:40:27,587 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 15:40:27,588 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 15:40:27,607 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:40:27" (1/1) ... [2024-06-20 15:40:27,608 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:40:27" (1/1) ... [2024-06-20 15:40:27,617 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:40:27" (1/1) ... [2024-06-20 15:40:27,648 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-20 15:40:27,672 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:40:27" (1/1) ... [2024-06-20 15:40:27,673 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:40:27" (1/1) ... [2024-06-20 15:40:27,695 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:40:27" (1/1) ... [2024-06-20 15:40:27,697 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:40:27" (1/1) ... [2024-06-20 15:40:27,698 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:40:27" (1/1) ... [2024-06-20 15:40:27,703 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:40:27" (1/1) ... [2024-06-20 15:40:27,706 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 15:40:27,707 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 15:40:27,707 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 15:40:27,707 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 15:40:27,708 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:40:27" (1/1) ... [2024-06-20 15:40:27,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 15:40:27,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 15:40:27,741 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-20 15:40:27,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-20 15:40:27,782 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 15:40:27,782 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 15:40:27,782 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 15:40:27,782 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 15:40:27,782 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 15:40:27,783 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 15:40:27,783 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 15:40:27,783 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 15:40:27,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 15:40:27,783 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 15:40:27,783 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 15:40:27,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 15:40:27,784 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 15:40:27,887 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 15:40:27,889 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 15:40:28,205 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 15:40:28,207 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 15:40:28,373 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 15:40:28,373 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 15:40:28,374 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 03:40:28 BoogieIcfgContainer [2024-06-20 15:40:28,374 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 15:40:28,377 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 15:40:28,377 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 15:40:28,380 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 15:40:28,380 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 03:40:26" (1/4) ... [2024-06-20 15:40:28,381 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1821db10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 03:40:28, skipping insertion in model container [2024-06-20 15:40:28,381 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:40:26" (2/4) ... [2024-06-20 15:40:28,381 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1821db10 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 03:40:28, skipping insertion in model container [2024-06-20 15:40:28,382 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:40:27" (3/4) ... [2024-06-20 15:40:28,383 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1821db10 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 03:40:28, skipping insertion in model container [2024-06-20 15:40:28,383 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 03:40:28" (4/4) ... [2024-06-20 15:40:28,384 INFO L112 eAbstractionObserver]: Analyzing ICFG mix001.oepc.i [2024-06-20 15:40:28,398 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 15:40:28,399 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-20 15:40:28,399 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 15:40:28,437 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 15:40:28,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-20 15:40:28,515 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-20 15:40:28,515 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 15:40:28,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 70 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 15:40:28,517 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-20 15:40:28,520 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-20 15:40:28,536 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 15:40:28,542 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;@47f4a52c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 15:40:28,543 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-20 15:40:28,546 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 15:40:28,546 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-20 15:40:28,546 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 15:40:28,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:28,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 15:40:28,547 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:40:28,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:28,551 INFO L85 PathProgramCache]: Analyzing trace with hash 421617153, now seen corresponding path program 1 times [2024-06-20 15:40:28,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:28,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842790595] [2024-06-20 15:40:28,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:28,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:28,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:40:29,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:40:29,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:40:29,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842790595] [2024-06-20 15:40:29,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842790595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:40:29,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:40:29,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 15:40:29,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475232551] [2024-06-20 15:40:29,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:40:29,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 15:40:29,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:40:29,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 15:40:29,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 15:40:29,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2024-06-20 15:40:29,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:29,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:40:29,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2024-06-20 15:40:29,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:40:29,813 INFO L124 PetriNetUnfolderBase]: 1363/2133 cut-off events. [2024-06-20 15:40:29,814 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-06-20 15:40:29,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4257 conditions, 2133 events. 1363/2133 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 10767 event pairs, 964 based on Foata normal form. 1/2077 useless extension candidates. Maximal degree in co-relation 4245. Up to 2037 conditions per place. [2024-06-20 15:40:29,830 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 32 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-20 15:40:29,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 175 flow [2024-06-20 15:40:29,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 15:40:29,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 15:40:29,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 81 transitions. [2024-06-20 15:40:29,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627906976744186 [2024-06-20 15:40:29,842 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 81 transitions. [2024-06-20 15:40:29,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 175 flow [2024-06-20 15:40:29,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 15:40:29,846 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-20 15:40:29,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-20 15:40:29,851 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-20 15:40:29,851 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-20 15:40:29,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:29,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:29,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:40:29,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 15:40:29,852 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:40:29,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:29,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1447404018, now seen corresponding path program 1 times [2024-06-20 15:40:29,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:29,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662181675] [2024-06-20 15:40:29,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:29,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:29,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:40:30,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:40:30,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:40:30,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662181675] [2024-06-20 15:40:30,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662181675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:40:30,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:40:30,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 15:40:30,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153173367] [2024-06-20 15:40:30,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:40:30,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 15:40:30,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:40:30,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 15:40:30,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-20 15:40:30,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2024-06-20 15:40:30,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:30,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:40:30,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2024-06-20 15:40:30,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:40:31,018 INFO L124 PetriNetUnfolderBase]: 1357/2134 cut-off events. [2024-06-20 15:40:31,018 INFO L125 PetriNetUnfolderBase]: For 414/414 co-relation queries the response was YES. [2024-06-20 15:40:31,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4801 conditions, 2134 events. 1357/2134 cut-off events. For 414/414 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 10886 event pairs, 840 based on Foata normal form. 3/2120 useless extension candidates. Maximal degree in co-relation 4789. Up to 2013 conditions per place. [2024-06-20 15:40:31,029 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 39 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-20 15:40:31,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 242 flow [2024-06-20 15:40:31,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:40:31,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:40:31,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-06-20 15:40:31,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6104651162790697 [2024-06-20 15:40:31,031 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 105 transitions. [2024-06-20 15:40:31,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 242 flow [2024-06-20 15:40:31,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 15:40:31,032 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-20 15:40:31,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-20 15:40:31,033 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-20 15:40:31,033 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-20 15:40:31,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:31,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:31,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:40:31,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 15:40:31,034 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:40:31,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:31,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1919853034, now seen corresponding path program 1 times [2024-06-20 15:40:31,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:31,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613468609] [2024-06-20 15:40:31,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:31,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:31,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:40:31,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:40:31,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:40:31,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613468609] [2024-06-20 15:40:31,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613468609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:40:31,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:40:31,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:40:31,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507525381] [2024-06-20 15:40:31,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:40:31,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:40:31,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:40:31,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:40:31,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:40:32,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2024-06-20 15:40:32,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:32,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:40:32,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2024-06-20 15:40:32,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:40:32,436 INFO L124 PetriNetUnfolderBase]: 1345/2138 cut-off events. [2024-06-20 15:40:32,437 INFO L125 PetriNetUnfolderBase]: For 1162/1162 co-relation queries the response was YES. [2024-06-20 15:40:32,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5310 conditions, 2138 events. 1345/2138 cut-off events. For 1162/1162 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 11001 event pairs, 592 based on Foata normal form. 6/2124 useless extension candidates. Maximal degree in co-relation 5296. Up to 1965 conditions per place. [2024-06-20 15:40:32,451 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 47 selfloop transitions, 10 changer transitions 0/65 dead transitions. [2024-06-20 15:40:32,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 65 transitions, 324 flow [2024-06-20 15:40:32,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:40:32,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:40:32,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-20 15:40:32,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6046511627906976 [2024-06-20 15:40:32,458 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 5 states and 130 transitions. [2024-06-20 15:40:32,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 65 transitions, 324 flow [2024-06-20 15:40:32,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 65 transitions, 310 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-20 15:40:32,462 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 176 flow [2024-06-20 15:40:32,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=176, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-20 15:40:32,464 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 6 predicate places. [2024-06-20 15:40:32,464 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 176 flow [2024-06-20 15:40:32,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:32,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:32,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:40:32,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 15:40:32,466 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)] === [2024-06-20 15:40:32,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:32,466 INFO L85 PathProgramCache]: Analyzing trace with hash -143902164, now seen corresponding path program 1 times [2024-06-20 15:40:32,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:32,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156750800] [2024-06-20 15:40:32,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:32,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:32,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:40:33,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:40:33,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:40:33,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156750800] [2024-06-20 15:40:33,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156750800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:40:33,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:40:33,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:40:33,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782869469] [2024-06-20 15:40:33,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:40:33,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:40:33,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:40:33,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:40:33,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:40:33,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:40:33,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 176 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:33,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:40:33,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:40:33,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:40:34,006 INFO L124 PetriNetUnfolderBase]: 1930/2977 cut-off events. [2024-06-20 15:40:34,006 INFO L125 PetriNetUnfolderBase]: For 2797/2797 co-relation queries the response was YES. [2024-06-20 15:40:34,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8032 conditions, 2977 events. 1930/2977 cut-off events. For 2797/2797 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14863 event pairs, 1075 based on Foata normal form. 2/2977 useless extension candidates. Maximal degree in co-relation 8016. Up to 2849 conditions per place. [2024-06-20 15:40:34,020 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 44 selfloop transitions, 8 changer transitions 0/57 dead transitions. [2024-06-20 15:40:34,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 57 transitions, 322 flow [2024-06-20 15:40:34,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:40:34,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:40:34,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 98 transitions. [2024-06-20 15:40:34,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-20 15:40:34,021 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 176 flow. Second operand 5 states and 98 transitions. [2024-06-20 15:40:34,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 57 transitions, 322 flow [2024-06-20 15:40:34,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 57 transitions, 298 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 15:40:34,024 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 196 flow [2024-06-20 15:40:34,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=196, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-20 15:40:34,025 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 8 predicate places. [2024-06-20 15:40:34,025 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 196 flow [2024-06-20 15:40:34,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:34,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:34,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:40:34,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 15:40:34,026 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:40:34,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:34,026 INFO L85 PathProgramCache]: Analyzing trace with hash 866500830, now seen corresponding path program 1 times [2024-06-20 15:40:34,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:34,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427624595] [2024-06-20 15:40:34,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:34,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:34,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:40:35,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:40:35,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:40:35,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427624595] [2024-06-20 15:40:35,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427624595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:40:35,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:40:35,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:40:35,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999908987] [2024-06-20 15:40:35,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:40:35,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:40:35,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:40:35,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:40:35,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:40:35,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-20 15:40:35,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 196 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:35,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:40:35,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-20 15:40:35,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:40:36,531 INFO L124 PetriNetUnfolderBase]: 1797/2828 cut-off events. [2024-06-20 15:40:36,532 INFO L125 PetriNetUnfolderBase]: For 4327/4327 co-relation queries the response was YES. [2024-06-20 15:40:36,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8152 conditions, 2828 events. 1797/2828 cut-off events. For 4327/4327 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 14574 event pairs, 603 based on Foata normal form. 6/2822 useless extension candidates. Maximal degree in co-relation 8135. Up to 2550 conditions per place. [2024-06-20 15:40:36,547 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 67 selfloop transitions, 18 changer transitions 0/93 dead transitions. [2024-06-20 15:40:36,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 93 transitions, 498 flow [2024-06-20 15:40:36,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:40:36,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:40:36,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-20 15:40:36,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5523255813953488 [2024-06-20 15:40:36,549 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 196 flow. Second operand 8 states and 190 transitions. [2024-06-20 15:40:36,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 93 transitions, 498 flow [2024-06-20 15:40:36,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 93 transitions, 478 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 15:40:36,553 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 265 flow [2024-06-20 15:40:36,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=265, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2024-06-20 15:40:36,554 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2024-06-20 15:40:36,554 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 265 flow [2024-06-20 15:40:36,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:36,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:36,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:40:36,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 15:40:36,555 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:40:36,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:36,555 INFO L85 PathProgramCache]: Analyzing trace with hash -165998705, now seen corresponding path program 1 times [2024-06-20 15:40:36,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:36,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102484790] [2024-06-20 15:40:36,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:36,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:36,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:40:37,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:40:37,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:40:37,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102484790] [2024-06-20 15:40:37,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102484790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:40:37,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:40:37,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:40:37,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880938439] [2024-06-20 15:40:37,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:40:37,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:40:37,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:40:37,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:40:37,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:40:37,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:40:37,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 265 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:37,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:40:37,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:40:37,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:40:38,107 INFO L124 PetriNetUnfolderBase]: 1911/2946 cut-off events. [2024-06-20 15:40:38,107 INFO L125 PetriNetUnfolderBase]: For 6507/6507 co-relation queries the response was YES. [2024-06-20 15:40:38,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9332 conditions, 2946 events. 1911/2946 cut-off events. For 6507/6507 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14688 event pairs, 750 based on Foata normal form. 4/2948 useless extension candidates. Maximal degree in co-relation 9312. Up to 2802 conditions per place. [2024-06-20 15:40:38,124 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 56 selfloop transitions, 11 changer transitions 0/72 dead transitions. [2024-06-20 15:40:38,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 72 transitions, 459 flow [2024-06-20 15:40:38,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:40:38,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:40:38,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-20 15:40:38,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44573643410852715 [2024-06-20 15:40:38,126 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 265 flow. Second operand 6 states and 115 transitions. [2024-06-20 15:40:38,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 72 transitions, 459 flow [2024-06-20 15:40:38,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 72 transitions, 416 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-20 15:40:38,129 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 278 flow [2024-06-20 15:40:38,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=278, PETRI_PLACES=60, PETRI_TRANSITIONS=56} [2024-06-20 15:40:38,130 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 16 predicate places. [2024-06-20 15:40:38,130 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 278 flow [2024-06-20 15:40:38,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:38,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:38,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:40:38,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 15:40:38,131 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:40:38,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:38,132 INFO L85 PathProgramCache]: Analyzing trace with hash -857666613, now seen corresponding path program 1 times [2024-06-20 15:40:38,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:38,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251071237] [2024-06-20 15:40:38,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:38,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:38,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:40:38,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:40:38,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:40:38,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251071237] [2024-06-20 15:40:38,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251071237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:40:38,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:40:38,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:40:38,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562294025] [2024-06-20 15:40:38,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:40:38,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:40:38,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:40:38,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:40:38,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:40:38,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:40:38,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 278 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:38,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:40:38,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:40:38,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:40:39,411 INFO L124 PetriNetUnfolderBase]: 1922/2986 cut-off events. [2024-06-20 15:40:39,412 INFO L125 PetriNetUnfolderBase]: For 8450/8456 co-relation queries the response was YES. [2024-06-20 15:40:39,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9989 conditions, 2986 events. 1922/2986 cut-off events. For 8450/8456 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 15081 event pairs, 751 based on Foata normal form. 6/2989 useless extension candidates. Maximal degree in co-relation 9967. Up to 2801 conditions per place. [2024-06-20 15:40:39,432 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 61 selfloop transitions, 16 changer transitions 0/82 dead transitions. [2024-06-20 15:40:39,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 82 transitions, 550 flow [2024-06-20 15:40:39,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:40:39,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:40:39,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-20 15:40:39,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4689922480620155 [2024-06-20 15:40:39,434 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 278 flow. Second operand 6 states and 121 transitions. [2024-06-20 15:40:39,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 82 transitions, 550 flow [2024-06-20 15:40:39,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 82 transitions, 518 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-20 15:40:39,439 INFO L231 Difference]: Finished difference. Result has 62 places, 62 transitions, 336 flow [2024-06-20 15:40:39,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=336, PETRI_PLACES=62, PETRI_TRANSITIONS=62} [2024-06-20 15:40:39,441 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 18 predicate places. [2024-06-20 15:40:39,441 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 62 transitions, 336 flow [2024-06-20 15:40:39,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:39,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:39,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:40:39,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 15:40:39,442 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)] === [2024-06-20 15:40:39,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:39,442 INFO L85 PathProgramCache]: Analyzing trace with hash -535513683, now seen corresponding path program 2 times [2024-06-20 15:40:39,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:39,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468890866] [2024-06-20 15:40:39,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:39,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:39,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:40:40,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:40:40,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:40:40,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468890866] [2024-06-20 15:40:40,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468890866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:40:40,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:40:40,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:40:40,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920451802] [2024-06-20 15:40:40,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:40:40,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:40:40,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:40:40,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:40:40,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:40:40,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:40:40,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 62 transitions, 336 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:40,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:40:40,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:40:40,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:40:40,731 INFO L124 PetriNetUnfolderBase]: 1917/2978 cut-off events. [2024-06-20 15:40:40,731 INFO L125 PetriNetUnfolderBase]: For 10815/10815 co-relation queries the response was YES. [2024-06-20 15:40:40,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10568 conditions, 2978 events. 1917/2978 cut-off events. For 10815/10815 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 15006 event pairs, 747 based on Foata normal form. 2/2978 useless extension candidates. Maximal degree in co-relation 10545. Up to 2820 conditions per place. [2024-06-20 15:40:40,744 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 61 selfloop transitions, 11 changer transitions 0/77 dead transitions. [2024-06-20 15:40:40,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 77 transitions, 518 flow [2024-06-20 15:40:40,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:40:40,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:40:40,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-20 15:40:40,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-20 15:40:40,747 INFO L175 Difference]: Start difference. First operand has 62 places, 62 transitions, 336 flow. Second operand 6 states and 114 transitions. [2024-06-20 15:40:40,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 77 transitions, 518 flow [2024-06-20 15:40:40,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 77 transitions, 482 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-20 15:40:40,757 INFO L231 Difference]: Finished difference. Result has 66 places, 62 transitions, 330 flow [2024-06-20 15:40:40,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=330, PETRI_PLACES=66, PETRI_TRANSITIONS=62} [2024-06-20 15:40:40,759 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 22 predicate places. [2024-06-20 15:40:40,760 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 62 transitions, 330 flow [2024-06-20 15:40:40,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:40,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:40,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:40:40,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 15:40:40,760 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:40:40,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:40,761 INFO L85 PathProgramCache]: Analyzing trace with hash -818010091, now seen corresponding path program 1 times [2024-06-20 15:40:40,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:40,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006116102] [2024-06-20 15:40:40,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:40,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:40,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:40:41,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:40:41,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:40:41,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006116102] [2024-06-20 15:40:41,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006116102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:40:41,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:40:41,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:40:41,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618405415] [2024-06-20 15:40:41,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:40:41,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:40:41,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:40:41,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:40:41,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:40:41,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:40:41,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 330 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:41,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:40:41,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:40:41,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:40:42,497 INFO L124 PetriNetUnfolderBase]: 1928/2994 cut-off events. [2024-06-20 15:40:42,498 INFO L125 PetriNetUnfolderBase]: For 12919/12925 co-relation queries the response was YES. [2024-06-20 15:40:42,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10919 conditions, 2994 events. 1928/2994 cut-off events. For 12919/12925 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 15069 event pairs, 733 based on Foata normal form. 6/2997 useless extension candidates. Maximal degree in co-relation 10894. Up to 2772 conditions per place. [2024-06-20 15:40:42,512 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 66 selfloop transitions, 24 changer transitions 0/95 dead transitions. [2024-06-20 15:40:42,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 95 transitions, 662 flow [2024-06-20 15:40:42,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:40:42,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:40:42,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-20 15:40:42,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4717607973421927 [2024-06-20 15:40:42,514 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 330 flow. Second operand 7 states and 142 transitions. [2024-06-20 15:40:42,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 95 transitions, 662 flow [2024-06-20 15:40:42,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 95 transitions, 632 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-20 15:40:42,521 INFO L231 Difference]: Finished difference. Result has 68 places, 68 transitions, 414 flow [2024-06-20 15:40:42,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=414, PETRI_PLACES=68, PETRI_TRANSITIONS=68} [2024-06-20 15:40:42,521 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 24 predicate places. [2024-06-20 15:40:42,521 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 68 transitions, 414 flow [2024-06-20 15:40:42,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:42,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:42,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:40:42,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 15:40:42,522 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:40:42,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:42,522 INFO L85 PathProgramCache]: Analyzing trace with hash 239126667, now seen corresponding path program 2 times [2024-06-20 15:40:42,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:42,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888606753] [2024-06-20 15:40:42,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:42,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:42,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:40:43,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:40:43,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:40:43,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888606753] [2024-06-20 15:40:43,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888606753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:40:43,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:40:43,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:40:43,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826417038] [2024-06-20 15:40:43,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:40:43,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:40:43,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:40:43,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:40:43,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:40:43,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:40:43,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 68 transitions, 414 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:43,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:40:43,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:40:43,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:40:44,355 INFO L124 PetriNetUnfolderBase]: 1939/3010 cut-off events. [2024-06-20 15:40:44,355 INFO L125 PetriNetUnfolderBase]: For 16224/16230 co-relation queries the response was YES. [2024-06-20 15:40:44,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11666 conditions, 3010 events. 1939/3010 cut-off events. For 16224/16230 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 15146 event pairs, 733 based on Foata normal form. 6/3013 useless extension candidates. Maximal degree in co-relation 11640. Up to 2819 conditions per place. [2024-06-20 15:40:44,373 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 69 selfloop transitions, 19 changer transitions 0/93 dead transitions. [2024-06-20 15:40:44,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 93 transitions, 678 flow [2024-06-20 15:40:44,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:40:44,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:40:44,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-20 15:40:44,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-20 15:40:44,375 INFO L175 Difference]: Start difference. First operand has 68 places, 68 transitions, 414 flow. Second operand 7 states and 136 transitions. [2024-06-20 15:40:44,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 93 transitions, 678 flow [2024-06-20 15:40:44,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 93 transitions, 630 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-20 15:40:44,385 INFO L231 Difference]: Finished difference. Result has 72 places, 71 transitions, 450 flow [2024-06-20 15:40:44,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=450, PETRI_PLACES=72, PETRI_TRANSITIONS=71} [2024-06-20 15:40:44,386 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 28 predicate places. [2024-06-20 15:40:44,386 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 71 transitions, 450 flow [2024-06-20 15:40:44,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:44,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:44,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:40:44,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 15:40:44,387 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:40:44,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:44,387 INFO L85 PathProgramCache]: Analyzing trace with hash 239126884, now seen corresponding path program 1 times [2024-06-20 15:40:44,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:44,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546432078] [2024-06-20 15:40:44,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:44,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:44,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:40:45,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:40:45,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:40:45,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546432078] [2024-06-20 15:40:45,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546432078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:40:45,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:40:45,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:40:45,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043968403] [2024-06-20 15:40:45,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:40:45,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:40:45,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:40:45,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:40:45,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:40:45,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:40:45,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 450 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:45,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:40:45,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:40:45,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:40:45,829 INFO L124 PetriNetUnfolderBase]: 1977/3062 cut-off events. [2024-06-20 15:40:45,829 INFO L125 PetriNetUnfolderBase]: For 18996/19002 co-relation queries the response was YES. [2024-06-20 15:40:45,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12100 conditions, 3062 events. 1977/3062 cut-off events. For 18996/19002 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 15351 event pairs, 688 based on Foata normal form. 5/3063 useless extension candidates. Maximal degree in co-relation 12072. Up to 2827 conditions per place. [2024-06-20 15:40:45,845 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 78 selfloop transitions, 23 changer transitions 0/106 dead transitions. [2024-06-20 15:40:45,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 106 transitions, 822 flow [2024-06-20 15:40:45,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:40:45,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:40:45,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-20 15:40:45,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4717607973421927 [2024-06-20 15:40:45,847 INFO L175 Difference]: Start difference. First operand has 72 places, 71 transitions, 450 flow. Second operand 7 states and 142 transitions. [2024-06-20 15:40:45,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 106 transitions, 822 flow [2024-06-20 15:40:45,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 106 transitions, 772 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-20 15:40:45,857 INFO L231 Difference]: Finished difference. Result has 75 places, 80 transitions, 540 flow [2024-06-20 15:40:45,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=540, PETRI_PLACES=75, PETRI_TRANSITIONS=80} [2024-06-20 15:40:45,857 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 31 predicate places. [2024-06-20 15:40:45,858 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 80 transitions, 540 flow [2024-06-20 15:40:45,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:45,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:45,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:40:45,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 15:40:45,858 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:40:45,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:45,859 INFO L85 PathProgramCache]: Analyzing trace with hash 579213004, now seen corresponding path program 2 times [2024-06-20 15:40:45,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:45,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341076895] [2024-06-20 15:40:45,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:45,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:45,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:40:46,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:40:46,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:40:46,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341076895] [2024-06-20 15:40:46,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341076895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:40:46,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:40:46,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:40:46,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039832354] [2024-06-20 15:40:46,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:40:46,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:40:46,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:40:46,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:40:46,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:40:46,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:40:46,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 80 transitions, 540 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:46,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:40:46,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:40:46,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:40:47,337 INFO L124 PetriNetUnfolderBase]: 1999/3099 cut-off events. [2024-06-20 15:40:47,338 INFO L125 PetriNetUnfolderBase]: For 23136/23136 co-relation queries the response was YES. [2024-06-20 15:40:47,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13101 conditions, 3099 events. 1999/3099 cut-off events. For 23136/23136 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 15539 event pairs, 695 based on Foata normal form. 4/3101 useless extension candidates. Maximal degree in co-relation 13071. Up to 2921 conditions per place. [2024-06-20 15:40:47,350 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 84 selfloop transitions, 14 changer transitions 0/103 dead transitions. [2024-06-20 15:40:47,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 103 transitions, 822 flow [2024-06-20 15:40:47,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:40:47,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:40:47,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-20 15:40:47,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2024-06-20 15:40:47,352 INFO L175 Difference]: Start difference. First operand has 75 places, 80 transitions, 540 flow. Second operand 7 states and 132 transitions. [2024-06-20 15:40:47,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 103 transitions, 822 flow [2024-06-20 15:40:47,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 103 transitions, 794 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-20 15:40:47,363 INFO L231 Difference]: Finished difference. Result has 80 places, 83 transitions, 588 flow [2024-06-20 15:40:47,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=588, PETRI_PLACES=80, PETRI_TRANSITIONS=83} [2024-06-20 15:40:47,364 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 36 predicate places. [2024-06-20 15:40:47,364 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 83 transitions, 588 flow [2024-06-20 15:40:47,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:47,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:47,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:40:47,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 15:40:47,365 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:40:47,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:47,365 INFO L85 PathProgramCache]: Analyzing trace with hash -611206921, now seen corresponding path program 3 times [2024-06-20 15:40:47,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:47,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412417463] [2024-06-20 15:40:47,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:47,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:47,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:40:48,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:40:48,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:40:48,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412417463] [2024-06-20 15:40:48,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412417463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:40:48,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:40:48,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:40:48,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692699233] [2024-06-20 15:40:48,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:40:48,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:40:48,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:40:48,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:40:48,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:40:48,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:40:48,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 83 transitions, 588 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:48,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:40:48,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:40:48,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:40:49,023 INFO L124 PetriNetUnfolderBase]: 1994/3092 cut-off events. [2024-06-20 15:40:49,023 INFO L125 PetriNetUnfolderBase]: For 26168/26168 co-relation queries the response was YES. [2024-06-20 15:40:49,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13362 conditions, 3092 events. 1994/3092 cut-off events. For 26168/26168 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 15497 event pairs, 695 based on Foata normal form. 2/3092 useless extension candidates. Maximal degree in co-relation 13329. Up to 2923 conditions per place. [2024-06-20 15:40:49,041 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 83 selfloop transitions, 14 changer transitions 0/102 dead transitions. [2024-06-20 15:40:49,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 102 transitions, 830 flow [2024-06-20 15:40:49,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:40:49,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:40:49,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-20 15:40:49,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-20 15:40:49,043 INFO L175 Difference]: Start difference. First operand has 80 places, 83 transitions, 588 flow. Second operand 7 states and 131 transitions. [2024-06-20 15:40:49,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 102 transitions, 830 flow [2024-06-20 15:40:49,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 102 transitions, 768 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-20 15:40:49,058 INFO L231 Difference]: Finished difference. Result has 82 places, 83 transitions, 562 flow [2024-06-20 15:40:49,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=526, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=562, PETRI_PLACES=82, PETRI_TRANSITIONS=83} [2024-06-20 15:40:49,058 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 38 predicate places. [2024-06-20 15:40:49,058 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 83 transitions, 562 flow [2024-06-20 15:40:49,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:49,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:49,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:40:49,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 15:40:49,059 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:40:49,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:49,060 INFO L85 PathProgramCache]: Analyzing trace with hash -2127513948, now seen corresponding path program 3 times [2024-06-20 15:40:49,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:49,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228374067] [2024-06-20 15:40:49,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:49,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:49,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:40:49,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:40:49,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:40:49,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228374067] [2024-06-20 15:40:49,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228374067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:40:49,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:40:49,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:40:49,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447322637] [2024-06-20 15:40:49,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:40:49,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:40:49,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:40:49,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:40:49,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:40:49,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:40:49,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 83 transitions, 562 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:49,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:40:49,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:40:49,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:40:50,464 INFO L124 PetriNetUnfolderBase]: 1984/3070 cut-off events. [2024-06-20 15:40:50,465 INFO L125 PetriNetUnfolderBase]: For 29465/29465 co-relation queries the response was YES. [2024-06-20 15:40:50,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13445 conditions, 3070 events. 1984/3070 cut-off events. For 29465/29465 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 15466 event pairs, 1027 based on Foata normal form. 4/3061 useless extension candidates. Maximal degree in co-relation 13412. Up to 2873 conditions per place. [2024-06-20 15:40:50,480 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 79 selfloop transitions, 21 changer transitions 0/105 dead transitions. [2024-06-20 15:40:50,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 105 transitions, 828 flow [2024-06-20 15:40:50,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:40:50,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:40:50,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-20 15:40:50,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-20 15:40:50,481 INFO L175 Difference]: Start difference. First operand has 82 places, 83 transitions, 562 flow. Second operand 8 states and 146 transitions. [2024-06-20 15:40:50,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 105 transitions, 828 flow [2024-06-20 15:40:50,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 105 transitions, 764 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-20 15:40:50,499 INFO L231 Difference]: Finished difference. Result has 84 places, 85 transitions, 565 flow [2024-06-20 15:40:50,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=565, PETRI_PLACES=84, PETRI_TRANSITIONS=85} [2024-06-20 15:40:50,499 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 40 predicate places. [2024-06-20 15:40:50,499 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 85 transitions, 565 flow [2024-06-20 15:40:50,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:50,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:50,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:40:50,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 15:40:50,500 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:40:50,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:50,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1140000622, now seen corresponding path program 1 times [2024-06-20 15:40:50,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:50,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954055140] [2024-06-20 15:40:50,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:50,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:50,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:40:51,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:40:51,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:40:51,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954055140] [2024-06-20 15:40:51,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954055140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:40:51,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:40:51,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:40:51,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665604523] [2024-06-20 15:40:51,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:40:51,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:40:51,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:40:51,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:40:51,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:40:51,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:40:51,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 85 transitions, 565 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) [2024-06-20 15:40:51,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:40:51,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:40:51,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:40:51,782 INFO L124 PetriNetUnfolderBase]: 2389/3655 cut-off events. [2024-06-20 15:40:51,783 INFO L125 PetriNetUnfolderBase]: For 45027/45054 co-relation queries the response was YES. [2024-06-20 15:40:51,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16719 conditions, 3655 events. 2389/3655 cut-off events. For 45027/45054 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 18569 event pairs, 1379 based on Foata normal form. 7/3634 useless extension candidates. Maximal degree in co-relation 16685. Up to 3537 conditions per place. [2024-06-20 15:40:51,803 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 71 selfloop transitions, 9 changer transitions 0/95 dead transitions. [2024-06-20 15:40:51,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 95 transitions, 763 flow [2024-06-20 15:40:51,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:40:51,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:40:51,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 93 transitions. [2024-06-20 15:40:51,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325581395348837 [2024-06-20 15:40:51,804 INFO L175 Difference]: Start difference. First operand has 84 places, 85 transitions, 565 flow. Second operand 5 states and 93 transitions. [2024-06-20 15:40:51,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 95 transitions, 763 flow [2024-06-20 15:40:51,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 95 transitions, 696 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-20 15:40:51,831 INFO L231 Difference]: Finished difference. Result has 83 places, 88 transitions, 548 flow [2024-06-20 15:40:51,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=498, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=548, PETRI_PLACES=83, PETRI_TRANSITIONS=88} [2024-06-20 15:40:51,832 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 39 predicate places. [2024-06-20 15:40:51,832 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 88 transitions, 548 flow [2024-06-20 15:40:51,832 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) [2024-06-20 15:40:51,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:51,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:40:51,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 15:40:51,832 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:40:51,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:51,833 INFO L85 PathProgramCache]: Analyzing trace with hash 204483210, now seen corresponding path program 1 times [2024-06-20 15:40:51,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:51,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942841358] [2024-06-20 15:40:51,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:51,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:51,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:40:52,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:40:52,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:40:52,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942841358] [2024-06-20 15:40:52,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942841358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:40:52,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:40:52,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:40:52,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271032887] [2024-06-20 15:40:52,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:40:52,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:40:52,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:40:52,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:40:52,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:40:52,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:40:52,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 88 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) [2024-06-20 15:40:52,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:40:52,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:40:52,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:40:53,745 INFO L124 PetriNetUnfolderBase]: 2237/3440 cut-off events. [2024-06-20 15:40:53,745 INFO L125 PetriNetUnfolderBase]: For 43902/43919 co-relation queries the response was YES. [2024-06-20 15:40:53,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16254 conditions, 3440 events. 2237/3440 cut-off events. For 43902/43919 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 17562 event pairs, 1007 based on Foata normal form. 4/3413 useless extension candidates. Maximal degree in co-relation 16219. Up to 3095 conditions per place. [2024-06-20 15:40:53,764 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 99 selfloop transitions, 50 changer transitions 0/155 dead transitions. [2024-06-20 15:40:53,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 155 transitions, 1152 flow [2024-06-20 15:40:53,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:40:53,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:40:53,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-20 15:40:53,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4599483204134367 [2024-06-20 15:40:53,767 INFO L175 Difference]: Start difference. First operand has 83 places, 88 transitions, 548 flow. Second operand 9 states and 178 transitions. [2024-06-20 15:40:53,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 155 transitions, 1152 flow [2024-06-20 15:40:53,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 155 transitions, 1124 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-20 15:40:53,796 INFO L231 Difference]: Finished difference. Result has 92 places, 122 transitions, 907 flow [2024-06-20 15:40:53,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=520, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=907, PETRI_PLACES=92, PETRI_TRANSITIONS=122} [2024-06-20 15:40:53,797 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 48 predicate places. [2024-06-20 15:40:53,797 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 122 transitions, 907 flow [2024-06-20 15:40:53,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:53,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:53,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:40:53,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 15:40:53,798 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:40:53,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:53,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1873568638, now seen corresponding path program 1 times [2024-06-20 15:40:53,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:53,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988492792] [2024-06-20 15:40:53,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:53,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:53,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:40:54,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:40:54,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:40:54,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988492792] [2024-06-20 15:40:54,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988492792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:40:54,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:40:54,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:40:54,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758149024] [2024-06-20 15:40:54,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:40:54,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:40:54,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:40:54,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:40:54,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:40:54,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:40:54,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 122 transitions, 907 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:54,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:40:54,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:40:54,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:40:55,696 INFO L124 PetriNetUnfolderBase]: 2324/3563 cut-off events. [2024-06-20 15:40:55,696 INFO L125 PetriNetUnfolderBase]: For 50847/50863 co-relation queries the response was YES. [2024-06-20 15:40:55,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18183 conditions, 3563 events. 2324/3563 cut-off events. For 50847/50863 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 18106 event pairs, 955 based on Foata normal form. 8/3546 useless extension candidates. Maximal degree in co-relation 18144. Up to 3237 conditions per place. [2024-06-20 15:40:55,713 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 142 selfloop transitions, 37 changer transitions 0/185 dead transitions. [2024-06-20 15:40:55,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 185 transitions, 1644 flow [2024-06-20 15:40:55,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:40:55,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:40:55,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 215 transitions. [2024-06-20 15:40:55,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-20 15:40:55,715 INFO L175 Difference]: Start difference. First operand has 92 places, 122 transitions, 907 flow. Second operand 11 states and 215 transitions. [2024-06-20 15:40:55,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 185 transitions, 1644 flow [2024-06-20 15:40:55,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 185 transitions, 1605 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-20 15:40:55,746 INFO L231 Difference]: Finished difference. Result has 103 places, 139 transitions, 1117 flow [2024-06-20 15:40:55,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=868, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1117, PETRI_PLACES=103, PETRI_TRANSITIONS=139} [2024-06-20 15:40:55,747 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 59 predicate places. [2024-06-20 15:40:55,747 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 139 transitions, 1117 flow [2024-06-20 15:40:55,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:55,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:55,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:40:55,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 15:40:55,748 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:40:55,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:55,748 INFO L85 PathProgramCache]: Analyzing trace with hash -927716516, now seen corresponding path program 2 times [2024-06-20 15:40:55,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:55,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32608809] [2024-06-20 15:40:55,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:55,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:55,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:40:56,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:40:56,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:40:56,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32608809] [2024-06-20 15:40:56,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32608809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:40:56,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:40:56,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:40:56,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038316650] [2024-06-20 15:40:56,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:40:56,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:40:56,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:40:56,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:40:56,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:40:56,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:40:56,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 139 transitions, 1117 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:56,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:40:56,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:40:56,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:40:57,563 INFO L124 PetriNetUnfolderBase]: 2402/3699 cut-off events. [2024-06-20 15:40:57,563 INFO L125 PetriNetUnfolderBase]: For 57391/57403 co-relation queries the response was YES. [2024-06-20 15:40:57,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19745 conditions, 3699 events. 2402/3699 cut-off events. For 57391/57403 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 18897 event pairs, 968 based on Foata normal form. 10/3694 useless extension candidates. Maximal degree in co-relation 19702. Up to 3338 conditions per place. [2024-06-20 15:40:57,586 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 142 selfloop transitions, 50 changer transitions 0/198 dead transitions. [2024-06-20 15:40:57,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 198 transitions, 1876 flow [2024-06-20 15:40:57,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:40:57,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:40:57,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-20 15:40:57,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625322997416021 [2024-06-20 15:40:57,588 INFO L175 Difference]: Start difference. First operand has 103 places, 139 transitions, 1117 flow. Second operand 9 states and 179 transitions. [2024-06-20 15:40:57,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 198 transitions, 1876 flow [2024-06-20 15:40:57,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 198 transitions, 1745 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-20 15:40:57,638 INFO L231 Difference]: Finished difference. Result has 110 places, 164 transitions, 1406 flow [2024-06-20 15:40:57,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1041, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1406, PETRI_PLACES=110, PETRI_TRANSITIONS=164} [2024-06-20 15:40:57,639 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 66 predicate places. [2024-06-20 15:40:57,639 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 164 transitions, 1406 flow [2024-06-20 15:40:57,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:57,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:57,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:40:57,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 15:40:57,640 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:40:57,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:57,640 INFO L85 PathProgramCache]: Analyzing trace with hash -917419370, now seen corresponding path program 2 times [2024-06-20 15:40:57,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:57,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264184923] [2024-06-20 15:40:57,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:57,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:57,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:40:58,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:40:58,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:40:58,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264184923] [2024-06-20 15:40:58,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264184923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:40:58,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:40:58,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:40:58,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326682058] [2024-06-20 15:40:58,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:40:58,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:40:58,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:40:58,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:40:58,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:40:58,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:40:58,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 164 transitions, 1406 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:58,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:40:58,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:40:58,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:40:59,528 INFO L124 PetriNetUnfolderBase]: 2573/3935 cut-off events. [2024-06-20 15:40:59,528 INFO L125 PetriNetUnfolderBase]: For 68919/68946 co-relation queries the response was YES. [2024-06-20 15:40:59,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21585 conditions, 3935 events. 2573/3935 cut-off events. For 68919/68946 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 20358 event pairs, 941 based on Foata normal form. 8/3902 useless extension candidates. Maximal degree in co-relation 21538. Up to 3429 conditions per place. [2024-06-20 15:40:59,550 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 153 selfloop transitions, 78 changer transitions 0/237 dead transitions. [2024-06-20 15:40:59,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 237 transitions, 2401 flow [2024-06-20 15:40:59,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:40:59,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:40:59,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-20 15:40:59,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4806201550387597 [2024-06-20 15:40:59,552 INFO L175 Difference]: Start difference. First operand has 110 places, 164 transitions, 1406 flow. Second operand 9 states and 186 transitions. [2024-06-20 15:40:59,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 237 transitions, 2401 flow [2024-06-20 15:40:59,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 237 transitions, 2306 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-20 15:40:59,594 INFO L231 Difference]: Finished difference. Result has 118 places, 198 transitions, 1846 flow [2024-06-20 15:40:59,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1311, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1846, PETRI_PLACES=118, PETRI_TRANSITIONS=198} [2024-06-20 15:40:59,594 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 74 predicate places. [2024-06-20 15:40:59,594 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 198 transitions, 1846 flow [2024-06-20 15:40:59,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:40:59,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:40:59,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:40:59,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 15:40:59,595 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:40:59,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:40:59,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1695364870, now seen corresponding path program 3 times [2024-06-20 15:40:59,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:40:59,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214565730] [2024-06-20 15:40:59,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:40:59,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:40:59,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:00,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:41:00,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:00,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214565730] [2024-06-20 15:41:00,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214565730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:00,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:00,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:41:00,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070889928] [2024-06-20 15:41:00,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:00,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:41:00,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:00,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:41:00,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:41:00,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:41:00,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 198 transitions, 1846 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:00,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:00,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:41:00,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:01,422 INFO L124 PetriNetUnfolderBase]: 2567/3946 cut-off events. [2024-06-20 15:41:01,423 INFO L125 PetriNetUnfolderBase]: For 73584/73595 co-relation queries the response was YES. [2024-06-20 15:41:01,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22720 conditions, 3946 events. 2567/3946 cut-off events. For 73584/73595 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 20293 event pairs, 870 based on Foata normal form. 8/3940 useless extension candidates. Maximal degree in co-relation 22669. Up to 3345 conditions per place. [2024-06-20 15:41:01,450 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 151 selfloop transitions, 95 changer transitions 0/252 dead transitions. [2024-06-20 15:41:01,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 252 transitions, 2786 flow [2024-06-20 15:41:01,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:41:01,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:41:01,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-20 15:41:01,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4806201550387597 [2024-06-20 15:41:01,451 INFO L175 Difference]: Start difference. First operand has 118 places, 198 transitions, 1846 flow. Second operand 9 states and 186 transitions. [2024-06-20 15:41:01,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 252 transitions, 2786 flow [2024-06-20 15:41:01,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 252 transitions, 2703 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-20 15:41:01,509 INFO L231 Difference]: Finished difference. Result has 125 places, 213 transitions, 2176 flow [2024-06-20 15:41:01,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1767, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2176, PETRI_PLACES=125, PETRI_TRANSITIONS=213} [2024-06-20 15:41:01,509 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 81 predicate places. [2024-06-20 15:41:01,510 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 213 transitions, 2176 flow [2024-06-20 15:41:01,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:01,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:01,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:01,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 15:41:01,510 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:01,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:01,511 INFO L85 PathProgramCache]: Analyzing trace with hash -116146566, now seen corresponding path program 4 times [2024-06-20 15:41:01,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:01,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252906707] [2024-06-20 15:41:01,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:01,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:01,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:02,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:41:02,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:02,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252906707] [2024-06-20 15:41:02,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252906707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:02,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:02,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:41:02,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911455815] [2024-06-20 15:41:02,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:02,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:41:02,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:02,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:41:02,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:41:03,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:41:03,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 213 transitions, 2176 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:03,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:03,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:41:03,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:03,950 INFO L124 PetriNetUnfolderBase]: 2643/4061 cut-off events. [2024-06-20 15:41:03,950 INFO L125 PetriNetUnfolderBase]: For 82972/82982 co-relation queries the response was YES. [2024-06-20 15:41:03,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24378 conditions, 4061 events. 2643/4061 cut-off events. For 82972/82982 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 20995 event pairs, 996 based on Foata normal form. 5/4049 useless extension candidates. Maximal degree in co-relation 24325. Up to 3774 conditions per place. [2024-06-20 15:41:03,979 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 224 selfloop transitions, 36 changer transitions 0/266 dead transitions. [2024-06-20 15:41:03,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 266 transitions, 3085 flow [2024-06-20 15:41:03,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:41:03,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:41:03,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-20 15:41:03,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-20 15:41:03,980 INFO L175 Difference]: Start difference. First operand has 125 places, 213 transitions, 2176 flow. Second operand 9 states and 171 transitions. [2024-06-20 15:41:03,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 266 transitions, 3085 flow [2024-06-20 15:41:04,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 266 transitions, 2966 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-20 15:41:04,045 INFO L231 Difference]: Finished difference. Result has 132 places, 236 transitions, 2473 flow [2024-06-20 15:41:04,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2065, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2473, PETRI_PLACES=132, PETRI_TRANSITIONS=236} [2024-06-20 15:41:04,045 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 88 predicate places. [2024-06-20 15:41:04,045 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 236 transitions, 2473 flow [2024-06-20 15:41:04,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:04,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:04,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:04,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 15:41:04,046 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:04,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:04,046 INFO L85 PathProgramCache]: Analyzing trace with hash -116026596, now seen corresponding path program 5 times [2024-06-20 15:41:04,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:04,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017391611] [2024-06-20 15:41:04,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:04,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:04,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:04,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:41:04,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:04,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017391611] [2024-06-20 15:41:04,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017391611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:04,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:04,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:41:04,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898629830] [2024-06-20 15:41:04,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:04,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:41:04,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:04,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:41:04,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:41:05,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:41:05,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 236 transitions, 2473 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:05,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:05,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:41:05,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:05,994 INFO L124 PetriNetUnfolderBase]: 2865/4396 cut-off events. [2024-06-20 15:41:05,994 INFO L125 PetriNetUnfolderBase]: For 94873/94890 co-relation queries the response was YES. [2024-06-20 15:41:06,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27210 conditions, 4396 events. 2865/4396 cut-off events. For 94873/94890 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 23040 event pairs, 1007 based on Foata normal form. 12/4388 useless extension candidates. Maximal degree in co-relation 27153. Up to 3883 conditions per place. [2024-06-20 15:41:06,028 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 227 selfloop transitions, 99 changer transitions 0/332 dead transitions. [2024-06-20 15:41:06,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 332 transitions, 4104 flow [2024-06-20 15:41:06,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:41:06,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:41:06,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-20 15:41:06,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4728682170542636 [2024-06-20 15:41:06,030 INFO L175 Difference]: Start difference. First operand has 132 places, 236 transitions, 2473 flow. Second operand 9 states and 183 transitions. [2024-06-20 15:41:06,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 332 transitions, 4104 flow [2024-06-20 15:41:06,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 332 transitions, 4028 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-20 15:41:06,109 INFO L231 Difference]: Finished difference. Result has 140 places, 290 transitions, 3389 flow [2024-06-20 15:41:06,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2397, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3389, PETRI_PLACES=140, PETRI_TRANSITIONS=290} [2024-06-20 15:41:06,110 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 96 predicate places. [2024-06-20 15:41:06,110 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 290 transitions, 3389 flow [2024-06-20 15:41:06,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:06,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:06,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:06,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 15:41:06,110 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:06,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:06,111 INFO L85 PathProgramCache]: Analyzing trace with hash -116026410, now seen corresponding path program 3 times [2024-06-20 15:41:06,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:06,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982705779] [2024-06-20 15:41:06,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:06,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:06,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:07,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:41:07,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:07,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982705779] [2024-06-20 15:41:07,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982705779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:07,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:07,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:41:07,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750921018] [2024-06-20 15:41:07,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:07,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:41:07,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:07,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:41:07,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:41:07,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:41:07,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 290 transitions, 3389 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:07,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:07,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:41:07,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:08,409 INFO L124 PetriNetUnfolderBase]: 2977/4573 cut-off events. [2024-06-20 15:41:08,409 INFO L125 PetriNetUnfolderBase]: For 107496/107513 co-relation queries the response was YES. [2024-06-20 15:41:08,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29394 conditions, 4573 events. 2977/4573 cut-off events. For 107496/107513 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 24288 event pairs, 1040 based on Foata normal form. 10/4562 useless extension candidates. Maximal degree in co-relation 29333. Up to 4005 conditions per place. [2024-06-20 15:41:08,451 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 238 selfloop transitions, 103 changer transitions 0/347 dead transitions. [2024-06-20 15:41:08,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 347 transitions, 4582 flow [2024-06-20 15:41:08,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:41:08,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:41:08,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-20 15:41:08,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4728682170542636 [2024-06-20 15:41:08,452 INFO L175 Difference]: Start difference. First operand has 140 places, 290 transitions, 3389 flow. Second operand 9 states and 183 transitions. [2024-06-20 15:41:08,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 347 transitions, 4582 flow [2024-06-20 15:41:08,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 347 transitions, 4509 flow, removed 32 selfloop flow, removed 2 redundant places. [2024-06-20 15:41:08,630 INFO L231 Difference]: Finished difference. Result has 148 places, 311 transitions, 3852 flow [2024-06-20 15:41:08,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3316, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3852, PETRI_PLACES=148, PETRI_TRANSITIONS=311} [2024-06-20 15:41:08,631 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 104 predicate places. [2024-06-20 15:41:08,631 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 311 transitions, 3852 flow [2024-06-20 15:41:08,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:08,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:08,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:08,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 15:41:08,632 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:08,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:08,632 INFO L85 PathProgramCache]: Analyzing trace with hash 204101724, now seen corresponding path program 6 times [2024-06-20 15:41:08,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:08,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483449719] [2024-06-20 15:41:08,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:08,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:08,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:09,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:41:09,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:09,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483449719] [2024-06-20 15:41:09,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483449719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:09,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:09,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:41:09,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424951644] [2024-06-20 15:41:09,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:09,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:41:09,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:09,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:41:09,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:41:09,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:41:09,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 311 transitions, 3852 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:09,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:09,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:41:09,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:10,607 INFO L124 PetriNetUnfolderBase]: 2988/4588 cut-off events. [2024-06-20 15:41:10,607 INFO L125 PetriNetUnfolderBase]: For 116902/116919 co-relation queries the response was YES. [2024-06-20 15:41:10,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30641 conditions, 4588 events. 2988/4588 cut-off events. For 116902/116919 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 24307 event pairs, 1028 based on Foata normal form. 12/4580 useless extension candidates. Maximal degree in co-relation 30577. Up to 4244 conditions per place. [2024-06-20 15:41:10,644 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 297 selfloop transitions, 43 changer transitions 0/346 dead transitions. [2024-06-20 15:41:10,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 346 transitions, 4760 flow [2024-06-20 15:41:10,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:41:10,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:41:10,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-20 15:41:10,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-20 15:41:10,649 INFO L175 Difference]: Start difference. First operand has 148 places, 311 transitions, 3852 flow. Second operand 9 states and 173 transitions. [2024-06-20 15:41:10,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 346 transitions, 4760 flow [2024-06-20 15:41:10,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 346 transitions, 4638 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-20 15:41:10,783 INFO L231 Difference]: Finished difference. Result has 154 places, 317 transitions, 3940 flow [2024-06-20 15:41:10,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3730, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3940, PETRI_PLACES=154, PETRI_TRANSITIONS=317} [2024-06-20 15:41:10,784 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 110 predicate places. [2024-06-20 15:41:10,784 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 317 transitions, 3940 flow [2024-06-20 15:41:10,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:10,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:10,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:10,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 15:41:10,785 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:10,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:10,785 INFO L85 PathProgramCache]: Analyzing trace with hash -111384780, now seen corresponding path program 4 times [2024-06-20 15:41:10,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:10,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292497592] [2024-06-20 15:41:10,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:10,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:10,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:11,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:41:11,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:11,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292497592] [2024-06-20 15:41:11,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292497592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:11,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:11,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:41:11,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822653202] [2024-06-20 15:41:11,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:11,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:41:11,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:11,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:41:11,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:41:12,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:41:12,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 317 transitions, 3940 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:12,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:12,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:41:12,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:13,152 INFO L124 PetriNetUnfolderBase]: 2992/4591 cut-off events. [2024-06-20 15:41:13,152 INFO L125 PetriNetUnfolderBase]: For 124177/124194 co-relation queries the response was YES. [2024-06-20 15:41:13,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31031 conditions, 4591 events. 2992/4591 cut-off events. For 124177/124194 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 24328 event pairs, 1034 based on Foata normal form. 10/4580 useless extension candidates. Maximal degree in co-relation 30964. Up to 4135 conditions per place. [2024-06-20 15:41:13,187 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 270 selfloop transitions, 77 changer transitions 0/353 dead transitions. [2024-06-20 15:41:13,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 353 transitions, 4859 flow [2024-06-20 15:41:13,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:41:13,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:41:13,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-20 15:41:13,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46770025839793283 [2024-06-20 15:41:13,188 INFO L175 Difference]: Start difference. First operand has 154 places, 317 transitions, 3940 flow. Second operand 9 states and 181 transitions. [2024-06-20 15:41:13,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 353 transitions, 4859 flow [2024-06-20 15:41:13,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 353 transitions, 4720 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-20 15:41:13,324 INFO L231 Difference]: Finished difference. Result has 156 places, 320 transitions, 4023 flow [2024-06-20 15:41:13,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3801, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4023, PETRI_PLACES=156, PETRI_TRANSITIONS=320} [2024-06-20 15:41:13,325 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 112 predicate places. [2024-06-20 15:41:13,325 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 320 transitions, 4023 flow [2024-06-20 15:41:13,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:13,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:13,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:13,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 15:41:13,326 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:13,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:13,326 INFO L85 PathProgramCache]: Analyzing trace with hash 411371882, now seen corresponding path program 7 times [2024-06-20 15:41:13,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:13,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814847979] [2024-06-20 15:41:13,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:13,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:13,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:14,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:41:14,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:14,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814847979] [2024-06-20 15:41:14,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814847979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:14,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:14,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:41:14,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824811064] [2024-06-20 15:41:14,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:14,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:41:14,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:14,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:41:14,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:41:14,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:41:14,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 320 transitions, 4023 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:14,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:14,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:41:14,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:15,820 INFO L124 PetriNetUnfolderBase]: 2990/4574 cut-off events. [2024-06-20 15:41:15,820 INFO L125 PetriNetUnfolderBase]: For 130146/130162 co-relation queries the response was YES. [2024-06-20 15:41:15,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31235 conditions, 4574 events. 2990/4574 cut-off events. For 130146/130162 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 24120 event pairs, 991 based on Foata normal form. 9/4562 useless extension candidates. Maximal degree in co-relation 31168. Up to 4182 conditions per place. [2024-06-20 15:41:15,862 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 298 selfloop transitions, 62 changer transitions 0/366 dead transitions. [2024-06-20 15:41:15,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 366 transitions, 5089 flow [2024-06-20 15:41:15,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:41:15,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:41:15,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-20 15:41:15,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-20 15:41:15,864 INFO L175 Difference]: Start difference. First operand has 156 places, 320 transitions, 4023 flow. Second operand 8 states and 157 transitions. [2024-06-20 15:41:15,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 366 transitions, 5089 flow [2024-06-20 15:41:16,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 366 transitions, 4891 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-20 15:41:16,023 INFO L231 Difference]: Finished difference. Result has 157 places, 333 transitions, 4176 flow [2024-06-20 15:41:16,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3825, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4176, PETRI_PLACES=157, PETRI_TRANSITIONS=333} [2024-06-20 15:41:16,024 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 113 predicate places. [2024-06-20 15:41:16,024 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 333 transitions, 4176 flow [2024-06-20 15:41:16,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:16,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:16,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:16,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 15:41:16,025 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:16,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:16,040 INFO L85 PathProgramCache]: Analyzing trace with hash 411491852, now seen corresponding path program 8 times [2024-06-20 15:41:16,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:16,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494206341] [2024-06-20 15:41:16,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:16,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:16,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:17,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:41:17,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:17,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494206341] [2024-06-20 15:41:17,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494206341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:17,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:17,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:41:17,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012116421] [2024-06-20 15:41:17,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:17,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:41:17,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:17,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:41:17,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:41:17,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:41:17,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 333 transitions, 4176 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:17,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:17,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:41:17,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:18,288 INFO L124 PetriNetUnfolderBase]: 2999/4590 cut-off events. [2024-06-20 15:41:18,289 INFO L125 PetriNetUnfolderBase]: For 136514/136537 co-relation queries the response was YES. [2024-06-20 15:41:18,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31787 conditions, 4590 events. 2999/4590 cut-off events. For 136514/136537 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 24165 event pairs, 880 based on Foata normal form. 19/4598 useless extension candidates. Maximal degree in co-relation 31719. Up to 3986 conditions per place. [2024-06-20 15:41:18,327 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 256 selfloop transitions, 131 changer transitions 0/393 dead transitions. [2024-06-20 15:41:18,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 393 transitions, 5580 flow [2024-06-20 15:41:18,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:41:18,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:41:18,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-20 15:41:18,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680232558139535 [2024-06-20 15:41:18,328 INFO L175 Difference]: Start difference. First operand has 157 places, 333 transitions, 4176 flow. Second operand 8 states and 161 transitions. [2024-06-20 15:41:18,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 393 transitions, 5580 flow [2024-06-20 15:41:18,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 393 transitions, 5451 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-20 15:41:18,488 INFO L231 Difference]: Finished difference. Result has 160 places, 357 transitions, 4744 flow [2024-06-20 15:41:18,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4047, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4744, PETRI_PLACES=160, PETRI_TRANSITIONS=357} [2024-06-20 15:41:18,489 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 116 predicate places. [2024-06-20 15:41:18,489 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 357 transitions, 4744 flow [2024-06-20 15:41:18,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:18,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:18,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:18,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 15:41:18,489 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:18,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:18,490 INFO L85 PathProgramCache]: Analyzing trace with hash 411492038, now seen corresponding path program 5 times [2024-06-20 15:41:18,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:18,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882537407] [2024-06-20 15:41:18,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:18,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:18,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:19,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:41:19,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:19,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882537407] [2024-06-20 15:41:19,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882537407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:19,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:19,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:41:19,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110345407] [2024-06-20 15:41:19,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:19,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:41:19,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:19,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:41:19,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:41:19,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:41:19,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 357 transitions, 4744 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:19,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:19,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:41:19,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:20,527 INFO L124 PetriNetUnfolderBase]: 3088/4713 cut-off events. [2024-06-20 15:41:20,528 INFO L125 PetriNetUnfolderBase]: For 157952/157976 co-relation queries the response was YES. [2024-06-20 15:41:20,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33980 conditions, 4713 events. 3088/4713 cut-off events. For 157952/157976 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 25046 event pairs, 982 based on Foata normal form. 12/4690 useless extension candidates. Maximal degree in co-relation 33910. Up to 3943 conditions per place. [2024-06-20 15:41:20,564 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 239 selfloop transitions, 153 changer transitions 0/398 dead transitions. [2024-06-20 15:41:20,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 398 transitions, 5946 flow [2024-06-20 15:41:20,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:41:20,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:41:20,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-20 15:41:20,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796511627906977 [2024-06-20 15:41:20,566 INFO L175 Difference]: Start difference. First operand has 160 places, 357 transitions, 4744 flow. Second operand 8 states and 165 transitions. [2024-06-20 15:41:20,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 398 transitions, 5946 flow [2024-06-20 15:41:20,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 398 transitions, 5804 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-20 15:41:20,719 INFO L231 Difference]: Finished difference. Result has 165 places, 366 transitions, 5164 flow [2024-06-20 15:41:20,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4602, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5164, PETRI_PLACES=165, PETRI_TRANSITIONS=366} [2024-06-20 15:41:20,724 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 121 predicate places. [2024-06-20 15:41:20,724 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 366 transitions, 5164 flow [2024-06-20 15:41:20,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:20,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:20,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:20,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 15:41:20,725 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:20,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:20,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1736370086, now seen corresponding path program 6 times [2024-06-20 15:41:20,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:20,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781944954] [2024-06-20 15:41:20,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:20,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:20,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:21,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:41:21,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:21,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781944954] [2024-06-20 15:41:21,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781944954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:21,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:21,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:41:21,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492342009] [2024-06-20 15:41:21,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:21,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:41:21,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:21,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:41:21,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:41:21,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:41:21,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 366 transitions, 5164 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:21,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:21,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:41:21,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:22,777 INFO L124 PetriNetUnfolderBase]: 3122/4794 cut-off events. [2024-06-20 15:41:22,777 INFO L125 PetriNetUnfolderBase]: For 168616/168633 co-relation queries the response was YES. [2024-06-20 15:41:22,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35689 conditions, 4794 events. 3122/4794 cut-off events. For 168616/168633 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 25704 event pairs, 1047 based on Foata normal form. 15/4788 useless extension candidates. Maximal degree in co-relation 35616. Up to 4286 conditions per place. [2024-06-20 15:41:22,819 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 317 selfloop transitions, 88 changer transitions 0/411 dead transitions. [2024-06-20 15:41:22,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 411 transitions, 6443 flow [2024-06-20 15:41:22,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:41:22,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:41:22,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-20 15:41:22,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-20 15:41:22,820 INFO L175 Difference]: Start difference. First operand has 165 places, 366 transitions, 5164 flow. Second operand 8 states and 158 transitions. [2024-06-20 15:41:22,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 411 transitions, 6443 flow [2024-06-20 15:41:23,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 411 transitions, 6139 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-20 15:41:23,024 INFO L231 Difference]: Finished difference. Result has 167 places, 381 transitions, 5393 flow [2024-06-20 15:41:23,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4881, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5393, PETRI_PLACES=167, PETRI_TRANSITIONS=381} [2024-06-20 15:41:23,025 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 123 predicate places. [2024-06-20 15:41:23,026 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 381 transitions, 5393 flow [2024-06-20 15:41:23,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:23,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:23,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:23,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 15:41:23,026 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:23,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:23,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1654964520, now seen corresponding path program 7 times [2024-06-20 15:41:23,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:23,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818776255] [2024-06-20 15:41:23,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:23,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:23,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:24,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:41:24,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:24,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818776255] [2024-06-20 15:41:24,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818776255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:24,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:24,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:41:24,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342321321] [2024-06-20 15:41:24,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:24,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:41:24,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:24,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:41:24,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:41:24,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:41:24,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 381 transitions, 5393 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:24,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:24,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:41:24,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:25,169 INFO L124 PetriNetUnfolderBase]: 3172/4867 cut-off events. [2024-06-20 15:41:25,170 INFO L125 PetriNetUnfolderBase]: For 157469/157486 co-relation queries the response was YES. [2024-06-20 15:41:25,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35414 conditions, 4867 events. 3172/4867 cut-off events. For 157469/157486 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 26148 event pairs, 1044 based on Foata normal form. 12/4858 useless extension candidates. Maximal degree in co-relation 35341. Up to 4265 conditions per place. [2024-06-20 15:41:25,214 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 301 selfloop transitions, 115 changer transitions 0/422 dead transitions. [2024-06-20 15:41:25,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 422 transitions, 6599 flow [2024-06-20 15:41:25,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:41:25,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:41:25,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-20 15:41:25,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680232558139535 [2024-06-20 15:41:25,215 INFO L175 Difference]: Start difference. First operand has 167 places, 381 transitions, 5393 flow. Second operand 8 states and 161 transitions. [2024-06-20 15:41:25,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 422 transitions, 6599 flow [2024-06-20 15:41:25,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 422 transitions, 6343 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-20 15:41:25,440 INFO L231 Difference]: Finished difference. Result has 169 places, 390 transitions, 5592 flow [2024-06-20 15:41:25,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5137, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5592, PETRI_PLACES=169, PETRI_TRANSITIONS=390} [2024-06-20 15:41:25,441 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 125 predicate places. [2024-06-20 15:41:25,441 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 390 transitions, 5592 flow [2024-06-20 15:41:25,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:25,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:25,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:25,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 15:41:25,442 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:25,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:25,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1654964334, now seen corresponding path program 9 times [2024-06-20 15:41:25,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:25,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50500415] [2024-06-20 15:41:25,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:25,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:25,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:26,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:41:26,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:26,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50500415] [2024-06-20 15:41:26,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50500415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:26,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:26,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:41:26,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201258665] [2024-06-20 15:41:26,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:26,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:41:26,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:26,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:41:26,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:41:26,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:41:26,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 390 transitions, 5592 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:26,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:26,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:41:26,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:27,453 INFO L124 PetriNetUnfolderBase]: 3222/4949 cut-off events. [2024-06-20 15:41:27,453 INFO L125 PetriNetUnfolderBase]: For 168479/168496 co-relation queries the response was YES. [2024-06-20 15:41:27,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36474 conditions, 4949 events. 3222/4949 cut-off events. For 168479/168496 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 26673 event pairs, 1047 based on Foata normal form. 14/4943 useless extension candidates. Maximal degree in co-relation 36400. Up to 4528 conditions per place. [2024-06-20 15:41:27,498 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 356 selfloop transitions, 69 changer transitions 0/431 dead transitions. [2024-06-20 15:41:27,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 431 transitions, 6894 flow [2024-06-20 15:41:27,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:41:27,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:41:27,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-20 15:41:27,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-20 15:41:27,500 INFO L175 Difference]: Start difference. First operand has 169 places, 390 transitions, 5592 flow. Second operand 8 states and 154 transitions. [2024-06-20 15:41:27,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 431 transitions, 6894 flow [2024-06-20 15:41:27,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 431 transitions, 6578 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-20 15:41:27,710 INFO L231 Difference]: Finished difference. Result has 171 places, 405 transitions, 5791 flow [2024-06-20 15:41:27,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5276, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5791, PETRI_PLACES=171, PETRI_TRANSITIONS=405} [2024-06-20 15:41:27,711 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 127 predicate places. [2024-06-20 15:41:27,711 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 405 transitions, 5791 flow [2024-06-20 15:41:27,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:27,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:27,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:27,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 15:41:27,712 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:27,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:27,712 INFO L85 PathProgramCache]: Analyzing trace with hash 767454086, now seen corresponding path program 8 times [2024-06-20 15:41:27,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:27,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648891696] [2024-06-20 15:41:27,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:27,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:27,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:28,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:41:28,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:28,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648891696] [2024-06-20 15:41:28,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648891696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:28,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:28,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:41:28,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033961389] [2024-06-20 15:41:28,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:28,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:41:28,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:28,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:41:28,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:41:28,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:41:28,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 405 transitions, 5791 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:28,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:28,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:41:28,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:29,713 INFO L124 PetriNetUnfolderBase]: 3287/5043 cut-off events. [2024-06-20 15:41:29,713 INFO L125 PetriNetUnfolderBase]: For 171751/171763 co-relation queries the response was YES. [2024-06-20 15:41:29,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37050 conditions, 5043 events. 3287/5043 cut-off events. For 171751/171763 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 27214 event pairs, 1169 based on Foata normal form. 8/5029 useless extension candidates. Maximal degree in co-relation 36975. Up to 4557 conditions per place. [2024-06-20 15:41:29,763 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 372 selfloop transitions, 68 changer transitions 0/446 dead transitions. [2024-06-20 15:41:29,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 446 transitions, 7165 flow [2024-06-20 15:41:29,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:41:29,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:41:29,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-20 15:41:29,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-20 15:41:29,785 INFO L175 Difference]: Start difference. First operand has 171 places, 405 transitions, 5791 flow. Second operand 8 states and 156 transitions. [2024-06-20 15:41:29,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 446 transitions, 7165 flow [2024-06-20 15:41:30,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 446 transitions, 6871 flow, removed 93 selfloop flow, removed 6 redundant places. [2024-06-20 15:41:30,049 INFO L231 Difference]: Finished difference. Result has 173 places, 414 transitions, 5848 flow [2024-06-20 15:41:30,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5501, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5848, PETRI_PLACES=173, PETRI_TRANSITIONS=414} [2024-06-20 15:41:30,051 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 129 predicate places. [2024-06-20 15:41:30,051 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 414 transitions, 5848 flow [2024-06-20 15:41:30,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:30,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:30,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:30,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 15:41:30,052 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:30,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:30,052 INFO L85 PathProgramCache]: Analyzing trace with hash -949099172, now seen corresponding path program 9 times [2024-06-20 15:41:30,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:30,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824192276] [2024-06-20 15:41:30,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:30,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:30,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:31,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:41:31,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:31,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824192276] [2024-06-20 15:41:31,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824192276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:31,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:31,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:41:31,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603057731] [2024-06-20 15:41:31,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:31,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:41:31,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:31,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:41:31,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:41:31,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:41:31,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 414 transitions, 5848 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:31,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:31,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:41:31,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:32,131 INFO L124 PetriNetUnfolderBase]: 3355/5146 cut-off events. [2024-06-20 15:41:32,132 INFO L125 PetriNetUnfolderBase]: For 175008/175020 co-relation queries the response was YES. [2024-06-20 15:41:32,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37871 conditions, 5146 events. 3355/5146 cut-off events. For 175008/175020 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 27867 event pairs, 1180 based on Foata normal form. 11/5135 useless extension candidates. Maximal degree in co-relation 37795. Up to 4740 conditions per place. [2024-06-20 15:41:32,318 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 402 selfloop transitions, 52 changer transitions 0/460 dead transitions. [2024-06-20 15:41:32,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 460 transitions, 7294 flow [2024-06-20 15:41:32,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:41:32,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:41:32,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-20 15:41:32,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-20 15:41:32,332 INFO L175 Difference]: Start difference. First operand has 173 places, 414 transitions, 5848 flow. Second operand 8 states and 153 transitions. [2024-06-20 15:41:32,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 460 transitions, 7294 flow [2024-06-20 15:41:32,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 460 transitions, 6928 flow, removed 67 selfloop flow, removed 6 redundant places. [2024-06-20 15:41:32,523 INFO L231 Difference]: Finished difference. Result has 175 places, 429 transitions, 5983 flow [2024-06-20 15:41:32,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5522, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5983, PETRI_PLACES=175, PETRI_TRANSITIONS=429} [2024-06-20 15:41:32,523 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 131 predicate places. [2024-06-20 15:41:32,524 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 429 transitions, 5983 flow [2024-06-20 15:41:32,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:32,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:32,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:32,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 15:41:32,524 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:32,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:32,525 INFO L85 PathProgramCache]: Analyzing trace with hash -940824962, now seen corresponding path program 10 times [2024-06-20 15:41:32,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:32,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854859524] [2024-06-20 15:41:32,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:32,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:32,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:33,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:41:33,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:33,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854859524] [2024-06-20 15:41:33,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854859524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:33,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:33,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:41:33,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690655615] [2024-06-20 15:41:33,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:33,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:41:33,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:33,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:41:33,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:41:33,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:41:33,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 429 transitions, 5983 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:33,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:33,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:41:33,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:34,635 INFO L124 PetriNetUnfolderBase]: 3325/5102 cut-off events. [2024-06-20 15:41:34,635 INFO L125 PetriNetUnfolderBase]: For 176382/176394 co-relation queries the response was YES. [2024-06-20 15:41:34,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37182 conditions, 5102 events. 3325/5102 cut-off events. For 176382/176394 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 27624 event pairs, 1182 based on Foata normal form. 11/5091 useless extension candidates. Maximal degree in co-relation 37105. Up to 4738 conditions per place. [2024-06-20 15:41:34,682 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 413 selfloop transitions, 37 changer transitions 0/456 dead transitions. [2024-06-20 15:41:34,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 456 transitions, 7042 flow [2024-06-20 15:41:34,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:41:34,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:41:34,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-20 15:41:34,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-20 15:41:34,683 INFO L175 Difference]: Start difference. First operand has 175 places, 429 transitions, 5983 flow. Second operand 8 states and 150 transitions. [2024-06-20 15:41:34,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 456 transitions, 7042 flow [2024-06-20 15:41:34,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 456 transitions, 6631 flow, removed 163 selfloop flow, removed 6 redundant places. [2024-06-20 15:41:34,957 INFO L231 Difference]: Finished difference. Result has 177 places, 429 transitions, 5669 flow [2024-06-20 15:41:34,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5572, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5669, PETRI_PLACES=177, PETRI_TRANSITIONS=429} [2024-06-20 15:41:34,957 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 133 predicate places. [2024-06-20 15:41:34,958 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 429 transitions, 5669 flow [2024-06-20 15:41:34,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:34,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:34,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:34,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 15:41:34,958 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:34,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:34,959 INFO L85 PathProgramCache]: Analyzing trace with hash -949105868, now seen corresponding path program 10 times [2024-06-20 15:41:34,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:34,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690393683] [2024-06-20 15:41:34,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:34,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:34,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:35,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:41:35,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:35,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690393683] [2024-06-20 15:41:35,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690393683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:35,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:35,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:41:35,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062969810] [2024-06-20 15:41:35,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:35,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:41:35,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:35,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:41:35,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:41:36,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:41:36,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 429 transitions, 5669 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:36,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:36,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:41:36,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:37,324 INFO L124 PetriNetUnfolderBase]: 3329/5108 cut-off events. [2024-06-20 15:41:37,324 INFO L125 PetriNetUnfolderBase]: For 177711/177723 co-relation queries the response was YES. [2024-06-20 15:41:37,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36496 conditions, 5108 events. 3329/5108 cut-off events. For 177711/177723 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 27644 event pairs, 1182 based on Foata normal form. 8/5094 useless extension candidates. Maximal degree in co-relation 36418. Up to 4763 conditions per place. [2024-06-20 15:41:37,395 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 413 selfloop transitions, 39 changer transitions 0/458 dead transitions. [2024-06-20 15:41:37,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 458 transitions, 6811 flow [2024-06-20 15:41:37,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:41:37,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:41:37,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 15:41:37,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-20 15:41:37,397 INFO L175 Difference]: Start difference. First operand has 177 places, 429 transitions, 5669 flow. Second operand 8 states and 149 transitions. [2024-06-20 15:41:37,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 458 transitions, 6811 flow [2024-06-20 15:41:37,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 458 transitions, 6589 flow, removed 59 selfloop flow, removed 7 redundant places. [2024-06-20 15:41:37,677 INFO L231 Difference]: Finished difference. Result has 178 places, 435 transitions, 5682 flow [2024-06-20 15:41:37,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5451, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5682, PETRI_PLACES=178, PETRI_TRANSITIONS=435} [2024-06-20 15:41:37,678 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 134 predicate places. [2024-06-20 15:41:37,678 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 435 transitions, 5682 flow [2024-06-20 15:41:37,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:37,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:37,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:37,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 15:41:37,679 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:37,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:37,679 INFO L85 PathProgramCache]: Analyzing trace with hash -940517132, now seen corresponding path program 1 times [2024-06-20 15:41:37,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:37,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175789944] [2024-06-20 15:41:37,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:37,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:37,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:39,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:41:39,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:39,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175789944] [2024-06-20 15:41:39,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175789944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:39,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:39,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:41:39,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99816561] [2024-06-20 15:41:39,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:39,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:41:39,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:39,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:41:39,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:41:39,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 15:41:39,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 435 transitions, 5682 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:39,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:39,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 15:41:39,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:40,465 INFO L124 PetriNetUnfolderBase]: 3931/5925 cut-off events. [2024-06-20 15:41:40,465 INFO L125 PetriNetUnfolderBase]: For 210071/210083 co-relation queries the response was YES. [2024-06-20 15:41:40,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41439 conditions, 5925 events. 3931/5925 cut-off events. For 210071/210083 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 31177 event pairs, 1470 based on Foata normal form. 4/5906 useless extension candidates. Maximal degree in co-relation 41360. Up to 5645 conditions per place. [2024-06-20 15:41:40,523 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 439 selfloop transitions, 19 changer transitions 0/463 dead transitions. [2024-06-20 15:41:40,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 463 transitions, 6778 flow [2024-06-20 15:41:40,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:41:40,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:41:40,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-20 15:41:40,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-20 15:41:40,525 INFO L175 Difference]: Start difference. First operand has 178 places, 435 transitions, 5682 flow. Second operand 8 states and 142 transitions. [2024-06-20 15:41:40,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 463 transitions, 6778 flow [2024-06-20 15:41:40,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 463 transitions, 6576 flow, removed 71 selfloop flow, removed 6 redundant places. [2024-06-20 15:41:40,843 INFO L231 Difference]: Finished difference. Result has 181 places, 440 transitions, 5597 flow [2024-06-20 15:41:40,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5480, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5597, PETRI_PLACES=181, PETRI_TRANSITIONS=440} [2024-06-20 15:41:40,843 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 137 predicate places. [2024-06-20 15:41:40,843 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 440 transitions, 5597 flow [2024-06-20 15:41:40,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:40,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:40,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:40,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 15:41:40,844 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:40,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:40,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1023178354, now seen corresponding path program 1 times [2024-06-20 15:41:40,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:40,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819975272] [2024-06-20 15:41:40,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:40,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:40,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:41,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:41:41,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:41,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819975272] [2024-06-20 15:41:41,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819975272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:41,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:41,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:41:41,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99623567] [2024-06-20 15:41:41,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:41,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:41:41,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:41,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:41:41,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:41:41,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:41:41,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 440 transitions, 5597 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:41,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:41,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:41:41,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:42,765 INFO L124 PetriNetUnfolderBase]: 3576/5535 cut-off events. [2024-06-20 15:41:42,765 INFO L125 PetriNetUnfolderBase]: For 214819/214972 co-relation queries the response was YES. [2024-06-20 15:41:42,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38419 conditions, 5535 events. 3576/5535 cut-off events. For 214819/214972 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 30199 event pairs, 1522 based on Foata normal form. 83/5592 useless extension candidates. Maximal degree in co-relation 38338. Up to 4996 conditions per place. [2024-06-20 15:41:42,819 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 318 selfloop transitions, 12 changer transitions 0/453 dead transitions. [2024-06-20 15:41:42,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 453 transitions, 6319 flow [2024-06-20 15:41:42,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:41:42,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:41:42,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-20 15:41:42,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42248062015503873 [2024-06-20 15:41:42,820 INFO L175 Difference]: Start difference. First operand has 181 places, 440 transitions, 5597 flow. Second operand 6 states and 109 transitions. [2024-06-20 15:41:42,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 453 transitions, 6319 flow [2024-06-20 15:41:43,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 453 transitions, 6252 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-20 15:41:43,093 INFO L231 Difference]: Finished difference. Result has 182 places, 443 transitions, 5592 flow [2024-06-20 15:41:43,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5530, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5592, PETRI_PLACES=182, PETRI_TRANSITIONS=443} [2024-06-20 15:41:43,093 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 138 predicate places. [2024-06-20 15:41:43,093 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 443 transitions, 5592 flow [2024-06-20 15:41:43,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:43,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:43,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:43,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 15:41:43,094 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:43,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:43,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1434850573, now seen corresponding path program 1 times [2024-06-20 15:41:43,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:43,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100699045] [2024-06-20 15:41:43,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:43,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:43,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:44,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:41:44,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:44,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100699045] [2024-06-20 15:41:44,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100699045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:44,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:44,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:41:44,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768986755] [2024-06-20 15:41:44,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:44,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:41:44,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:44,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:41:44,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:41:44,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:41:44,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 443 transitions, 5592 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:44,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:44,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:41:44,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:45,582 INFO L124 PetriNetUnfolderBase]: 3676/5634 cut-off events. [2024-06-20 15:41:45,582 INFO L125 PetriNetUnfolderBase]: For 225098/225125 co-relation queries the response was YES. [2024-06-20 15:41:45,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41012 conditions, 5634 events. 3676/5634 cut-off events. For 225098/225125 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 30801 event pairs, 1113 based on Foata normal form. 22/5632 useless extension candidates. Maximal degree in co-relation 40930. Up to 4942 conditions per place. [2024-06-20 15:41:45,637 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 393 selfloop transitions, 93 changer transitions 0/493 dead transitions. [2024-06-20 15:41:45,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 493 transitions, 7036 flow [2024-06-20 15:41:45,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:41:45,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:41:45,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-20 15:41:45,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744186046511628 [2024-06-20 15:41:45,638 INFO L175 Difference]: Start difference. First operand has 182 places, 443 transitions, 5592 flow. Second operand 10 states and 204 transitions. [2024-06-20 15:41:45,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 493 transitions, 7036 flow [2024-06-20 15:41:45,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 493 transitions, 6996 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-20 15:41:45,934 INFO L231 Difference]: Finished difference. Result has 188 places, 449 transitions, 5851 flow [2024-06-20 15:41:45,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5552, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5851, PETRI_PLACES=188, PETRI_TRANSITIONS=449} [2024-06-20 15:41:45,934 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 144 predicate places. [2024-06-20 15:41:45,934 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 449 transitions, 5851 flow [2024-06-20 15:41:45,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:45,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:45,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:45,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 15:41:45,935 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:45,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:45,936 INFO L85 PathProgramCache]: Analyzing trace with hash -2048913283, now seen corresponding path program 2 times [2024-06-20 15:41:45,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:45,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371878849] [2024-06-20 15:41:45,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:45,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:45,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:46,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:41:46,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:46,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371878849] [2024-06-20 15:41:46,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371878849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:46,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:46,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:41:46,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539423550] [2024-06-20 15:41:46,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:46,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:41:46,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:46,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:41:46,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:41:47,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:41:47,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 449 transitions, 5851 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:47,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:47,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:41:47,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:48,527 INFO L124 PetriNetUnfolderBase]: 3888/5925 cut-off events. [2024-06-20 15:41:48,527 INFO L125 PetriNetUnfolderBase]: For 258661/258692 co-relation queries the response was YES. [2024-06-20 15:41:48,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44658 conditions, 5925 events. 3888/5925 cut-off events. For 258661/258692 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 32477 event pairs, 1113 based on Foata normal form. 14/5905 useless extension candidates. Maximal degree in co-relation 44575. Up to 5106 conditions per place. [2024-06-20 15:41:48,585 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 398 selfloop transitions, 110 changer transitions 0/515 dead transitions. [2024-06-20 15:41:48,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 515 transitions, 7527 flow [2024-06-20 15:41:48,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:41:48,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:41:48,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 238 transitions. [2024-06-20 15:41:48,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46124031007751937 [2024-06-20 15:41:48,587 INFO L175 Difference]: Start difference. First operand has 188 places, 449 transitions, 5851 flow. Second operand 12 states and 238 transitions. [2024-06-20 15:41:48,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 515 transitions, 7527 flow [2024-06-20 15:41:48,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 515 transitions, 7378 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-20 15:41:48,909 INFO L231 Difference]: Finished difference. Result has 195 places, 459 transitions, 6145 flow [2024-06-20 15:41:48,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5702, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6145, PETRI_PLACES=195, PETRI_TRANSITIONS=459} [2024-06-20 15:41:48,909 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 151 predicate places. [2024-06-20 15:41:48,909 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 459 transitions, 6145 flow [2024-06-20 15:41:48,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:48,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:48,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:48,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 15:41:48,910 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:48,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:48,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1305560159, now seen corresponding path program 3 times [2024-06-20 15:41:48,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:48,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811783072] [2024-06-20 15:41:48,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:48,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:48,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:49,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:41:49,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:49,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811783072] [2024-06-20 15:41:49,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811783072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:49,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:49,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:41:49,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766575741] [2024-06-20 15:41:49,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:49,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:41:49,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:49,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:41:49,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:41:50,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:41:50,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 459 transitions, 6145 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:50,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:50,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:41:50,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:51,473 INFO L124 PetriNetUnfolderBase]: 3996/6102 cut-off events. [2024-06-20 15:41:51,473 INFO L125 PetriNetUnfolderBase]: For 275497/275522 co-relation queries the response was YES. [2024-06-20 15:41:51,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46789 conditions, 6102 events. 3996/6102 cut-off events. For 275497/275522 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 33775 event pairs, 1191 based on Foata normal form. 18/6092 useless extension candidates. Maximal degree in co-relation 46703. Up to 5452 conditions per place. [2024-06-20 15:41:51,536 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 412 selfloop transitions, 90 changer transitions 0/509 dead transitions. [2024-06-20 15:41:51,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 509 transitions, 7552 flow [2024-06-20 15:41:51,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:41:51,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:41:51,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-20 15:41:51,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4604651162790698 [2024-06-20 15:41:51,537 INFO L175 Difference]: Start difference. First operand has 195 places, 459 transitions, 6145 flow. Second operand 10 states and 198 transitions. [2024-06-20 15:41:51,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 509 transitions, 7552 flow [2024-06-20 15:41:51,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 509 transitions, 7261 flow, removed 98 selfloop flow, removed 7 redundant places. [2024-06-20 15:41:51,850 INFO L231 Difference]: Finished difference. Result has 198 places, 468 transitions, 6265 flow [2024-06-20 15:41:51,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5952, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6265, PETRI_PLACES=198, PETRI_TRANSITIONS=468} [2024-06-20 15:41:51,851 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 154 predicate places. [2024-06-20 15:41:51,851 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 468 transitions, 6265 flow [2024-06-20 15:41:51,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:51,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:51,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:51,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 15:41:51,852 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:51,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:51,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1624765919, now seen corresponding path program 4 times [2024-06-20 15:41:51,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:51,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988035153] [2024-06-20 15:41:51,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:51,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:51,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:52,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:41:52,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:52,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988035153] [2024-06-20 15:41:52,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988035153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:52,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:52,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:41:52,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092781182] [2024-06-20 15:41:52,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:52,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:41:52,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:52,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:41:52,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:41:52,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:41:52,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 468 transitions, 6265 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:52,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:52,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:41:52,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:54,562 INFO L124 PetriNetUnfolderBase]: 4285/6546 cut-off events. [2024-06-20 15:41:54,562 INFO L125 PetriNetUnfolderBase]: For 309616/309642 co-relation queries the response was YES. [2024-06-20 15:41:54,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50791 conditions, 6546 events. 4285/6546 cut-off events. For 309616/309642 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 37061 event pairs, 891 based on Foata normal form. 18/6536 useless extension candidates. Maximal degree in co-relation 50703. Up to 4227 conditions per place. [2024-06-20 15:41:54,630 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 267 selfloop transitions, 275 changer transitions 0/549 dead transitions. [2024-06-20 15:41:54,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 549 transitions, 8388 flow [2024-06-20 15:41:54,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:41:54,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:41:54,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 217 transitions. [2024-06-20 15:41:54,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5046511627906977 [2024-06-20 15:41:54,632 INFO L175 Difference]: Start difference. First operand has 198 places, 468 transitions, 6265 flow. Second operand 10 states and 217 transitions. [2024-06-20 15:41:54,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 549 transitions, 8388 flow [2024-06-20 15:41:55,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 549 transitions, 8190 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-20 15:41:55,041 INFO L231 Difference]: Finished difference. Result has 202 places, 491 transitions, 7108 flow [2024-06-20 15:41:55,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6067, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=258, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7108, PETRI_PLACES=202, PETRI_TRANSITIONS=491} [2024-06-20 15:41:55,042 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 158 predicate places. [2024-06-20 15:41:55,042 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 491 transitions, 7108 flow [2024-06-20 15:41:55,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:55,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:55,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:55,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 15:41:55,043 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:55,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:55,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1614046739, now seen corresponding path program 5 times [2024-06-20 15:41:55,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:55,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688739712] [2024-06-20 15:41:55,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:55,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:55,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:56,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:41:56,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:56,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688739712] [2024-06-20 15:41:56,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688739712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:56,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:56,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:41:56,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112182569] [2024-06-20 15:41:56,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:56,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:41:56,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:56,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:41:56,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:41:56,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:41:56,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 491 transitions, 7108 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:56,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:56,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:41:56,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:41:58,002 INFO L124 PetriNetUnfolderBase]: 4202/6419 cut-off events. [2024-06-20 15:41:58,002 INFO L125 PetriNetUnfolderBase]: For 321924/321950 co-relation queries the response was YES. [2024-06-20 15:41:58,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51477 conditions, 6419 events. 4202/6419 cut-off events. For 321924/321950 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 36150 event pairs, 952 based on Foata normal form. 18/6409 useless extension candidates. Maximal degree in co-relation 51387. Up to 4209 conditions per place. [2024-06-20 15:41:58,076 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 251 selfloop transitions, 287 changer transitions 0/545 dead transitions. [2024-06-20 15:41:58,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 545 transitions, 8723 flow [2024-06-20 15:41:58,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:41:58,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:41:58,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 213 transitions. [2024-06-20 15:41:58,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49534883720930234 [2024-06-20 15:41:58,078 INFO L175 Difference]: Start difference. First operand has 202 places, 491 transitions, 7108 flow. Second operand 10 states and 213 transitions. [2024-06-20 15:41:58,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 545 transitions, 8723 flow [2024-06-20 15:41:58,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 545 transitions, 8487 flow, removed 68 selfloop flow, removed 4 redundant places. [2024-06-20 15:41:58,488 INFO L231 Difference]: Finished difference. Result has 208 places, 491 transitions, 7467 flow [2024-06-20 15:41:58,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6884, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=287, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7467, PETRI_PLACES=208, PETRI_TRANSITIONS=491} [2024-06-20 15:41:58,491 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 164 predicate places. [2024-06-20 15:41:58,491 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 491 transitions, 7467 flow [2024-06-20 15:41:58,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:58,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:41:58,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:41:58,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 15:41:58,496 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:41:58,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:41:58,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1694209266, now seen corresponding path program 1 times [2024-06-20 15:41:58,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:41:58,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378473190] [2024-06-20 15:41:58,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:41:58,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:41:58,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:41:59,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:41:59,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:41:59,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378473190] [2024-06-20 15:41:59,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378473190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:41:59,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:41:59,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:41:59,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613786902] [2024-06-20 15:41:59,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:41:59,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:41:59,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:41:59,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:41:59,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:41:59,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:41:59,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 491 transitions, 7467 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:41:59,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:41:59,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:41:59,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:01,266 INFO L124 PetriNetUnfolderBase]: 4191/6402 cut-off events. [2024-06-20 15:42:01,266 INFO L125 PetriNetUnfolderBase]: For 322303/322325 co-relation queries the response was YES. [2024-06-20 15:42:01,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51571 conditions, 6402 events. 4191/6402 cut-off events. For 322303/322325 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 36024 event pairs, 1331 based on Foata normal form. 7/6387 useless extension candidates. Maximal degree in co-relation 51479. Up to 5935 conditions per place. [2024-06-20 15:42:01,342 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 459 selfloop transitions, 55 changer transitions 0/521 dead transitions. [2024-06-20 15:42:01,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 521 transitions, 8647 flow [2024-06-20 15:42:01,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:42:01,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:42:01,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-20 15:42:01,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-20 15:42:01,343 INFO L175 Difference]: Start difference. First operand has 208 places, 491 transitions, 7467 flow. Second operand 9 states and 173 transitions. [2024-06-20 15:42:01,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 521 transitions, 8647 flow [2024-06-20 15:42:01,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 521 transitions, 8015 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-20 15:42:01,845 INFO L231 Difference]: Finished difference. Result has 208 places, 491 transitions, 6981 flow [2024-06-20 15:42:01,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6841, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6981, PETRI_PLACES=208, PETRI_TRANSITIONS=491} [2024-06-20 15:42:01,846 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 164 predicate places. [2024-06-20 15:42:01,846 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 491 transitions, 6981 flow [2024-06-20 15:42:01,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:01,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:01,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:01,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 15:42:01,847 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:42:01,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:01,847 INFO L85 PathProgramCache]: Analyzing trace with hash 694424833, now seen corresponding path program 6 times [2024-06-20 15:42:01,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:01,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023916038] [2024-06-20 15:42:01,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:01,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:01,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:03,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:42:03,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:03,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023916038] [2024-06-20 15:42:03,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023916038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:03,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:03,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:42:03,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049967973] [2024-06-20 15:42:03,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:03,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:42:03,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:03,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:42:03,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:42:03,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:42:03,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 491 transitions, 6981 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:03,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:03,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:42:03,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:04,844 INFO L124 PetriNetUnfolderBase]: 4317/6604 cut-off events. [2024-06-20 15:42:04,844 INFO L125 PetriNetUnfolderBase]: For 340510/340532 co-relation queries the response was YES. [2024-06-20 15:42:04,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52426 conditions, 6604 events. 4317/6604 cut-off events. For 340510/340532 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 37540 event pairs, 1295 based on Foata normal form. 10/6591 useless extension candidates. Maximal degree in co-relation 52333. Up to 6125 conditions per place. [2024-06-20 15:42:04,918 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 483 selfloop transitions, 45 changer transitions 0/535 dead transitions. [2024-06-20 15:42:04,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 535 transitions, 8333 flow [2024-06-20 15:42:04,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:42:04,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:42:04,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-20 15:42:04,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43953488372093025 [2024-06-20 15:42:04,920 INFO L175 Difference]: Start difference. First operand has 208 places, 491 transitions, 6981 flow. Second operand 10 states and 189 transitions. [2024-06-20 15:42:04,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 535 transitions, 8333 flow [2024-06-20 15:42:05,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 535 transitions, 8229 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 15:42:05,387 INFO L231 Difference]: Finished difference. Result has 211 places, 500 transitions, 7122 flow [2024-06-20 15:42:05,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6877, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7122, PETRI_PLACES=211, PETRI_TRANSITIONS=500} [2024-06-20 15:42:05,388 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 167 predicate places. [2024-06-20 15:42:05,388 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 500 transitions, 7122 flow [2024-06-20 15:42:05,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:05,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:05,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:05,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 15:42:05,388 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:42:05,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:05,389 INFO L85 PathProgramCache]: Analyzing trace with hash 698149483, now seen corresponding path program 7 times [2024-06-20 15:42:05,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:05,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404386041] [2024-06-20 15:42:05,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:05,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:05,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:06,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:42:06,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:06,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404386041] [2024-06-20 15:42:06,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404386041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:06,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:06,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:42:06,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492189248] [2024-06-20 15:42:06,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:06,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:42:06,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:06,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:42:06,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:42:06,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:42:06,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 500 transitions, 7122 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:06,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:06,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:42:06,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:08,296 INFO L124 PetriNetUnfolderBase]: 4484/6858 cut-off events. [2024-06-20 15:42:08,297 INFO L125 PetriNetUnfolderBase]: For 374439/374463 co-relation queries the response was YES. [2024-06-20 15:42:08,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55606 conditions, 6858 events. 4484/6858 cut-off events. For 374439/374463 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 39391 event pairs, 1212 based on Foata normal form. 16/6843 useless extension candidates. Maximal degree in co-relation 55512. Up to 5719 conditions per place. [2024-06-20 15:42:08,373 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 402 selfloop transitions, 172 changer transitions 0/581 dead transitions. [2024-06-20 15:42:08,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 581 transitions, 9429 flow [2024-06-20 15:42:08,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:42:08,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:42:08,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-20 15:42:08,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4790697674418605 [2024-06-20 15:42:08,376 INFO L175 Difference]: Start difference. First operand has 211 places, 500 transitions, 7122 flow. Second operand 10 states and 206 transitions. [2024-06-20 15:42:08,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 581 transitions, 9429 flow [2024-06-20 15:42:08,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 581 transitions, 9302 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-20 15:42:08,948 INFO L231 Difference]: Finished difference. Result has 216 places, 531 transitions, 8026 flow [2024-06-20 15:42:08,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6995, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8026, PETRI_PLACES=216, PETRI_TRANSITIONS=531} [2024-06-20 15:42:08,948 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 172 predicate places. [2024-06-20 15:42:08,948 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 531 transitions, 8026 flow [2024-06-20 15:42:08,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:08,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:08,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:08,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 15:42:08,949 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:42:08,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:08,949 INFO L85 PathProgramCache]: Analyzing trace with hash 100807245, now seen corresponding path program 8 times [2024-06-20 15:42:08,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:08,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539368036] [2024-06-20 15:42:08,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:08,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:08,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:10,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:42:10,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:10,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539368036] [2024-06-20 15:42:10,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539368036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:10,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:10,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:42:10,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435486109] [2024-06-20 15:42:10,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:10,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:42:10,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:10,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:42:10,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:42:10,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:42:10,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 531 transitions, 8026 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:10,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:10,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:42:10,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:11,827 INFO L124 PetriNetUnfolderBase]: 4447/6811 cut-off events. [2024-06-20 15:42:11,827 INFO L125 PetriNetUnfolderBase]: For 389464/389487 co-relation queries the response was YES. [2024-06-20 15:42:11,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56911 conditions, 6811 events. 4447/6811 cut-off events. For 389464/389487 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 39155 event pairs, 1204 based on Foata normal form. 10/6787 useless extension candidates. Maximal degree in co-relation 56813. Up to 5677 conditions per place. [2024-06-20 15:42:11,921 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 405 selfloop transitions, 168 changer transitions 0/580 dead transitions. [2024-06-20 15:42:11,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 580 transitions, 9691 flow [2024-06-20 15:42:11,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:42:11,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:42:11,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-20 15:42:11,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4790697674418605 [2024-06-20 15:42:11,930 INFO L175 Difference]: Start difference. First operand has 216 places, 531 transitions, 8026 flow. Second operand 10 states and 206 transitions. [2024-06-20 15:42:11,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 580 transitions, 9691 flow [2024-06-20 15:42:12,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 580 transitions, 9460 flow, removed 82 selfloop flow, removed 4 redundant places. [2024-06-20 15:42:12,522 INFO L231 Difference]: Finished difference. Result has 222 places, 531 transitions, 8145 flow [2024-06-20 15:42:12,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7795, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8145, PETRI_PLACES=222, PETRI_TRANSITIONS=531} [2024-06-20 15:42:12,523 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 178 predicate places. [2024-06-20 15:42:12,523 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 531 transitions, 8145 flow [2024-06-20 15:42:12,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:12,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:12,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:12,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 15:42:12,524 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:42:12,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:12,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1434856153, now seen corresponding path program 9 times [2024-06-20 15:42:12,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:12,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972989442] [2024-06-20 15:42:12,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:12,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:12,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:13,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:42:13,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:13,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972989442] [2024-06-20 15:42:13,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972989442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:13,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:13,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:42:13,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809879730] [2024-06-20 15:42:13,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:13,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:42:13,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:13,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:42:13,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:42:13,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:42:13,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 531 transitions, 8145 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:13,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:13,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:42:13,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:15,250 INFO L124 PetriNetUnfolderBase]: 4468/6833 cut-off events. [2024-06-20 15:42:15,250 INFO L125 PetriNetUnfolderBase]: For 406715/406732 co-relation queries the response was YES. [2024-06-20 15:42:15,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57538 conditions, 6833 events. 4468/6833 cut-off events. For 406715/406732 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 39174 event pairs, 1342 based on Foata normal form. 16/6821 useless extension candidates. Maximal degree in co-relation 57438. Up to 5952 conditions per place. [2024-06-20 15:42:15,331 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 462 selfloop transitions, 119 changer transitions 0/588 dead transitions. [2024-06-20 15:42:15,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 588 transitions, 10003 flow [2024-06-20 15:42:15,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:42:15,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:42:15,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-20 15:42:15,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4790697674418605 [2024-06-20 15:42:15,333 INFO L175 Difference]: Start difference. First operand has 222 places, 531 transitions, 8145 flow. Second operand 10 states and 206 transitions. [2024-06-20 15:42:15,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 588 transitions, 10003 flow [2024-06-20 15:42:15,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 588 transitions, 9709 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-20 15:42:15,979 INFO L231 Difference]: Finished difference. Result has 225 places, 541 transitions, 8298 flow [2024-06-20 15:42:15,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7859, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8298, PETRI_PLACES=225, PETRI_TRANSITIONS=541} [2024-06-20 15:42:15,979 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 181 predicate places. [2024-06-20 15:42:15,979 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 541 transitions, 8298 flow [2024-06-20 15:42:15,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:15,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:15,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:15,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 15:42:15,980 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:42:15,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:15,980 INFO L85 PathProgramCache]: Analyzing trace with hash 244905165, now seen corresponding path program 10 times [2024-06-20 15:42:15,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:15,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425610258] [2024-06-20 15:42:15,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:15,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:15,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:17,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:42:17,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:17,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425610258] [2024-06-20 15:42:17,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425610258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:17,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:17,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:42:17,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675252055] [2024-06-20 15:42:17,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:17,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:42:17,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:17,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:42:17,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:42:17,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:42:17,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 541 transitions, 8298 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:17,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:17,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:42:17,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:18,851 INFO L124 PetriNetUnfolderBase]: 4447/6804 cut-off events. [2024-06-20 15:42:18,852 INFO L125 PetriNetUnfolderBase]: For 413532/413549 co-relation queries the response was YES. [2024-06-20 15:42:18,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57137 conditions, 6804 events. 4447/6804 cut-off events. For 413532/413549 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 39037 event pairs, 1322 based on Foata normal form. 12/6788 useless extension candidates. Maximal degree in co-relation 57036. Up to 6209 conditions per place. [2024-06-20 15:42:18,930 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 497 selfloop transitions, 75 changer transitions 0/579 dead transitions. [2024-06-20 15:42:18,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 579 transitions, 9681 flow [2024-06-20 15:42:18,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:42:18,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:42:18,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-20 15:42:18,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-20 15:42:18,936 INFO L175 Difference]: Start difference. First operand has 225 places, 541 transitions, 8298 flow. Second operand 10 states and 196 transitions. [2024-06-20 15:42:18,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 579 transitions, 9681 flow [2024-06-20 15:42:19,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 579 transitions, 9397 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-20 15:42:19,593 INFO L231 Difference]: Finished difference. Result has 228 places, 542 transitions, 8194 flow [2024-06-20 15:42:19,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8014, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8194, PETRI_PLACES=228, PETRI_TRANSITIONS=542} [2024-06-20 15:42:19,594 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 184 predicate places. [2024-06-20 15:42:19,594 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 542 transitions, 8194 flow [2024-06-20 15:42:19,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:19,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:19,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:19,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 15:42:19,595 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)] === [2024-06-20 15:42:19,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:19,595 INFO L85 PathProgramCache]: Analyzing trace with hash -284157647, now seen corresponding path program 1 times [2024-06-20 15:42:19,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:19,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685737801] [2024-06-20 15:42:19,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:19,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:19,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:20,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:42:20,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:20,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685737801] [2024-06-20 15:42:20,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685737801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:20,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:20,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:42:20,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031852106] [2024-06-20 15:42:20,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:20,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:42:20,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:20,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:42:20,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:42:20,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:42:20,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 542 transitions, 8194 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:20,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:20,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:42:20,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:21,851 INFO L124 PetriNetUnfolderBase]: 4797/7284 cut-off events. [2024-06-20 15:42:21,852 INFO L125 PetriNetUnfolderBase]: For 457277/457548 co-relation queries the response was YES. [2024-06-20 15:42:21,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60299 conditions, 7284 events. 4797/7284 cut-off events. For 457277/457548 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 41188 event pairs, 1643 based on Foata normal form. 138/7336 useless extension candidates. Maximal degree in co-relation 60197. Up to 6630 conditions per place. [2024-06-20 15:42:21,936 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 422 selfloop transitions, 21 changer transitions 0/566 dead transitions. [2024-06-20 15:42:21,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 566 transitions, 9296 flow [2024-06-20 15:42:21,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:42:21,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:42:21,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-20 15:42:21,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44518272425249167 [2024-06-20 15:42:21,938 INFO L175 Difference]: Start difference. First operand has 228 places, 542 transitions, 8194 flow. Second operand 7 states and 134 transitions. [2024-06-20 15:42:21,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 566 transitions, 9296 flow [2024-06-20 15:42:22,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 566 transitions, 9086 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-20 15:42:22,601 INFO L231 Difference]: Finished difference. Result has 228 places, 548 transitions, 8090 flow [2024-06-20 15:42:22,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7984, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8090, PETRI_PLACES=228, PETRI_TRANSITIONS=548} [2024-06-20 15:42:22,602 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 184 predicate places. [2024-06-20 15:42:22,602 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 548 transitions, 8090 flow [2024-06-20 15:42:22,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:22,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:22,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:22,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 15:42:22,603 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:42:22,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:22,603 INFO L85 PathProgramCache]: Analyzing trace with hash -132462828, now seen corresponding path program 2 times [2024-06-20 15:42:22,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:22,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152844214] [2024-06-20 15:42:22,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:22,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:22,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:23,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:42:23,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:23,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152844214] [2024-06-20 15:42:23,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152844214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:23,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:23,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:42:23,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876758070] [2024-06-20 15:42:23,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:23,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:42:23,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:23,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:42:23,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:42:23,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:42:23,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 548 transitions, 8090 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:23,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:23,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:42:23,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:25,357 INFO L124 PetriNetUnfolderBase]: 4532/6920 cut-off events. [2024-06-20 15:42:25,357 INFO L125 PetriNetUnfolderBase]: For 449402/449439 co-relation queries the response was YES. [2024-06-20 15:42:25,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58623 conditions, 6920 events. 4532/6920 cut-off events. For 449402/449439 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 39766 event pairs, 1243 based on Foata normal form. 9/6888 useless extension candidates. Maximal degree in co-relation 58520. Up to 6234 conditions per place. [2024-06-20 15:42:25,443 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 458 selfloop transitions, 109 changer transitions 0/576 dead transitions. [2024-06-20 15:42:25,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 576 transitions, 9368 flow [2024-06-20 15:42:25,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:42:25,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:42:25,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-20 15:42:25,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622093023255814 [2024-06-20 15:42:25,444 INFO L175 Difference]: Start difference. First operand has 228 places, 548 transitions, 8090 flow. Second operand 8 states and 159 transitions. [2024-06-20 15:42:25,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 576 transitions, 9368 flow [2024-06-20 15:42:26,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 576 transitions, 9303 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-20 15:42:26,160 INFO L231 Difference]: Finished difference. Result has 234 places, 548 transitions, 8311 flow [2024-06-20 15:42:26,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8025, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8311, PETRI_PLACES=234, PETRI_TRANSITIONS=548} [2024-06-20 15:42:26,161 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 190 predicate places. [2024-06-20 15:42:26,161 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 548 transitions, 8311 flow [2024-06-20 15:42:26,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:26,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:26,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:26,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 15:42:26,161 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:42:26,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:26,162 INFO L85 PathProgramCache]: Analyzing trace with hash -132372463, now seen corresponding path program 11 times [2024-06-20 15:42:26,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:26,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987079458] [2024-06-20 15:42:26,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:26,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:26,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:27,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:42:27,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:27,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987079458] [2024-06-20 15:42:27,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987079458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:27,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:27,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:42:27,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865281762] [2024-06-20 15:42:27,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:27,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:42:27,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:27,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:42:27,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:42:27,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:42:27,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 548 transitions, 8311 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:27,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:27,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:42:27,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:28,952 INFO L124 PetriNetUnfolderBase]: 4494/6876 cut-off events. [2024-06-20 15:42:28,953 INFO L125 PetriNetUnfolderBase]: For 466118/466143 co-relation queries the response was YES. [2024-06-20 15:42:29,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58609 conditions, 6876 events. 4494/6876 cut-off events. For 466118/466143 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 39413 event pairs, 1179 based on Foata normal form. 18/6864 useless extension candidates. Maximal degree in co-relation 58504. Up to 5876 conditions per place. [2024-06-20 15:42:29,034 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 438 selfloop transitions, 135 changer transitions 0/582 dead transitions. [2024-06-20 15:42:29,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 582 transitions, 9645 flow [2024-06-20 15:42:29,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:42:29,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:42:29,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-20 15:42:29,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4599483204134367 [2024-06-20 15:42:29,038 INFO L175 Difference]: Start difference. First operand has 234 places, 548 transitions, 8311 flow. Second operand 9 states and 178 transitions. [2024-06-20 15:42:29,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 582 transitions, 9645 flow [2024-06-20 15:42:29,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 582 transitions, 9324 flow, removed 28 selfloop flow, removed 9 redundant places. [2024-06-20 15:42:29,837 INFO L231 Difference]: Finished difference. Result has 234 places, 548 transitions, 8310 flow [2024-06-20 15:42:29,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7990, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8310, PETRI_PLACES=234, PETRI_TRANSITIONS=548} [2024-06-20 15:42:29,852 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 190 predicate places. [2024-06-20 15:42:29,852 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 548 transitions, 8310 flow [2024-06-20 15:42:29,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:29,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:29,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:29,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 15:42:29,853 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:42:29,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:29,853 INFO L85 PathProgramCache]: Analyzing trace with hash -128647813, now seen corresponding path program 12 times [2024-06-20 15:42:29,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:29,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440081985] [2024-06-20 15:42:29,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:29,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:29,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:31,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:42:31,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:31,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440081985] [2024-06-20 15:42:31,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440081985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:31,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:31,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:42:31,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124530500] [2024-06-20 15:42:31,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:31,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:42:31,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:31,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:42:31,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:42:31,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:42:31,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 548 transitions, 8310 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:31,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:31,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:42:31,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:32,608 INFO L124 PetriNetUnfolderBase]: 4725/7220 cut-off events. [2024-06-20 15:42:32,608 INFO L125 PetriNetUnfolderBase]: For 454371/454411 co-relation queries the response was YES. [2024-06-20 15:42:32,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61409 conditions, 7220 events. 4725/7220 cut-off events. For 454371/454411 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 41789 event pairs, 1037 based on Foata normal form. 16/7205 useless extension candidates. Maximal degree in co-relation 61305. Up to 4366 conditions per place. [2024-06-20 15:42:32,692 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 199 selfloop transitions, 402 changer transitions 0/610 dead transitions. [2024-06-20 15:42:32,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 610 transitions, 10663 flow [2024-06-20 15:42:32,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:42:32,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:42:32,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-20 15:42:32,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5012919896640827 [2024-06-20 15:42:32,693 INFO L175 Difference]: Start difference. First operand has 234 places, 548 transitions, 8310 flow. Second operand 9 states and 194 transitions. [2024-06-20 15:42:32,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 610 transitions, 10663 flow [2024-06-20 15:42:33,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 610 transitions, 10345 flow, removed 40 selfloop flow, removed 8 redundant places. [2024-06-20 15:42:33,308 INFO L231 Difference]: Finished difference. Result has 236 places, 563 transitions, 9373 flow [2024-06-20 15:42:33,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8016, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=387, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9373, PETRI_PLACES=236, PETRI_TRANSITIONS=563} [2024-06-20 15:42:33,309 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 192 predicate places. [2024-06-20 15:42:33,309 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 563 transitions, 9373 flow [2024-06-20 15:42:33,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:33,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:33,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:33,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 15:42:33,310 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:42:33,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:33,310 INFO L85 PathProgramCache]: Analyzing trace with hash -128653548, now seen corresponding path program 3 times [2024-06-20 15:42:33,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:33,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849018128] [2024-06-20 15:42:33,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:33,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:33,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:34,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:42:34,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:34,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849018128] [2024-06-20 15:42:34,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849018128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:34,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:34,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:42:34,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655265934] [2024-06-20 15:42:34,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:34,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:42:34,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:34,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:42:34,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:42:34,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:42:34,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 563 transitions, 9373 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:34,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:34,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:42:34,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:36,308 INFO L124 PetriNetUnfolderBase]: 4627/7039 cut-off events. [2024-06-20 15:42:36,310 INFO L125 PetriNetUnfolderBase]: For 421227/421272 co-relation queries the response was YES. [2024-06-20 15:42:36,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61504 conditions, 7039 events. 4627/7039 cut-off events. For 421227/421272 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 40289 event pairs, 1193 based on Foata normal form. 19/7033 useless extension candidates. Maximal degree in co-relation 61399. Up to 6266 conditions per place. [2024-06-20 15:42:36,437 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 436 selfloop transitions, 157 changer transitions 0/602 dead transitions. [2024-06-20 15:42:36,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 602 transitions, 10841 flow [2024-06-20 15:42:36,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:42:36,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:42:36,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-20 15:42:36,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45478036175710596 [2024-06-20 15:42:36,439 INFO L175 Difference]: Start difference. First operand has 236 places, 563 transitions, 9373 flow. Second operand 9 states and 176 transitions. [2024-06-20 15:42:36,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 602 transitions, 10841 flow [2024-06-20 15:42:37,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 602 transitions, 10228 flow, removed 113 selfloop flow, removed 5 redundant places. [2024-06-20 15:42:37,402 INFO L231 Difference]: Finished difference. Result has 240 places, 563 transitions, 9098 flow [2024-06-20 15:42:37,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8760, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9098, PETRI_PLACES=240, PETRI_TRANSITIONS=563} [2024-06-20 15:42:37,420 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 196 predicate places. [2024-06-20 15:42:37,420 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 563 transitions, 9098 flow [2024-06-20 15:42:37,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:37,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:37,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:37,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 15:42:37,426 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:42:37,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:37,426 INFO L85 PathProgramCache]: Analyzing trace with hash -128653393, now seen corresponding path program 13 times [2024-06-20 15:42:37,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:37,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108818553] [2024-06-20 15:42:37,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:37,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:37,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:38,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:42:38,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:38,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108818553] [2024-06-20 15:42:38,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108818553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:38,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:38,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:42:38,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517817838] [2024-06-20 15:42:38,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:38,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:42:38,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:38,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:42:38,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:42:38,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:42:38,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 563 transitions, 9098 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:38,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:38,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:42:38,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:40,106 INFO L124 PetriNetUnfolderBase]: 4685/7163 cut-off events. [2024-06-20 15:42:40,106 INFO L125 PetriNetUnfolderBase]: For 409939/409986 co-relation queries the response was YES. [2024-06-20 15:42:40,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60203 conditions, 7163 events. 4685/7163 cut-off events. For 409939/409986 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 41475 event pairs, 1039 based on Foata normal form. 22/7154 useless extension candidates. Maximal degree in co-relation 60098. Up to 4341 conditions per place. [2024-06-20 15:42:40,193 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 217 selfloop transitions, 382 changer transitions 0/608 dead transitions. [2024-06-20 15:42:40,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 608 transitions, 10785 flow [2024-06-20 15:42:40,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:42:40,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:42:40,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-20 15:42:40,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49612403100775193 [2024-06-20 15:42:40,194 INFO L175 Difference]: Start difference. First operand has 240 places, 563 transitions, 9098 flow. Second operand 9 states and 192 transitions. [2024-06-20 15:42:40,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 608 transitions, 10785 flow [2024-06-20 15:42:41,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 608 transitions, 10203 flow, removed 46 selfloop flow, removed 9 redundant places. [2024-06-20 15:42:41,033 INFO L231 Difference]: Finished difference. Result has 240 places, 563 transitions, 9311 flow [2024-06-20 15:42:41,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8516, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=382, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9311, PETRI_PLACES=240, PETRI_TRANSITIONS=563} [2024-06-20 15:42:41,034 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 196 predicate places. [2024-06-20 15:42:41,034 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 563 transitions, 9311 flow [2024-06-20 15:42:41,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:41,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:41,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:41,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 15:42:41,034 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:42:41,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:41,035 INFO L85 PathProgramCache]: Analyzing trace with hash 15444527, now seen corresponding path program 14 times [2024-06-20 15:42:41,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:41,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727555054] [2024-06-20 15:42:41,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:41,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:41,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:42,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:42:42,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:42,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727555054] [2024-06-20 15:42:42,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727555054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:42,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:42,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:42:42,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277048453] [2024-06-20 15:42:42,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:42,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:42:42,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:42,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:42:42,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:42:42,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:42:42,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 563 transitions, 9311 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:42,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:42,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:42:42,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:43,732 INFO L124 PetriNetUnfolderBase]: 4656/7122 cut-off events. [2024-06-20 15:42:43,732 INFO L125 PetriNetUnfolderBase]: For 422713/422755 co-relation queries the response was YES. [2024-06-20 15:42:43,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60548 conditions, 7122 events. 4656/7122 cut-off events. For 422713/422755 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 41427 event pairs, 1375 based on Foata normal form. 25/7114 useless extension candidates. Maximal degree in co-relation 60443. Up to 6368 conditions per place. [2024-06-20 15:42:43,801 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 493 selfloop transitions, 109 changer transitions 0/611 dead transitions. [2024-06-20 15:42:43,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 611 transitions, 11091 flow [2024-06-20 15:42:43,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:42:43,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:42:43,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-20 15:42:43,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45478036175710596 [2024-06-20 15:42:43,802 INFO L175 Difference]: Start difference. First operand has 240 places, 563 transitions, 9311 flow. Second operand 9 states and 176 transitions. [2024-06-20 15:42:43,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 611 transitions, 11091 flow [2024-06-20 15:42:44,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 611 transitions, 10396 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-20 15:42:44,309 INFO L231 Difference]: Finished difference. Result has 240 places, 575 transitions, 9221 flow [2024-06-20 15:42:44,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8626, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9221, PETRI_PLACES=240, PETRI_TRANSITIONS=575} [2024-06-20 15:42:44,309 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 196 predicate places. [2024-06-20 15:42:44,309 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 575 transitions, 9221 flow [2024-06-20 15:42:44,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:44,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:44,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:44,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 15:42:44,310 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:42:44,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:44,310 INFO L85 PathProgramCache]: Analyzing trace with hash 15242717, now seen corresponding path program 15 times [2024-06-20 15:42:44,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:44,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406810489] [2024-06-20 15:42:44,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:44,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:44,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:45,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:42:45,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:45,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406810489] [2024-06-20 15:42:45,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406810489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:45,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:45,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:42:45,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857001583] [2024-06-20 15:42:45,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:45,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:42:45,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:45,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:42:45,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:42:45,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:42:45,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 575 transitions, 9221 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:45,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:45,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:42:45,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:47,163 INFO L124 PetriNetUnfolderBase]: 4778/7312 cut-off events. [2024-06-20 15:42:47,163 INFO L125 PetriNetUnfolderBase]: For 417113/417145 co-relation queries the response was YES. [2024-06-20 15:42:47,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61368 conditions, 7312 events. 4778/7312 cut-off events. For 417113/417145 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 42774 event pairs, 1325 based on Foata normal form. 12/7291 useless extension candidates. Maximal degree in co-relation 61264. Up to 6253 conditions per place. [2024-06-20 15:42:47,244 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 467 selfloop transitions, 159 changer transitions 0/635 dead transitions. [2024-06-20 15:42:47,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 635 transitions, 11412 flow [2024-06-20 15:42:47,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:42:47,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:42:47,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-20 15:42:47,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4728682170542636 [2024-06-20 15:42:47,245 INFO L175 Difference]: Start difference. First operand has 240 places, 575 transitions, 9221 flow. Second operand 9 states and 183 transitions. [2024-06-20 15:42:47,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 635 transitions, 11412 flow [2024-06-20 15:42:47,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 635 transitions, 11019 flow, removed 101 selfloop flow, removed 7 redundant places. [2024-06-20 15:42:47,881 INFO L231 Difference]: Finished difference. Result has 243 places, 593 transitions, 9729 flow [2024-06-20 15:42:47,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8836, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9729, PETRI_PLACES=243, PETRI_TRANSITIONS=593} [2024-06-20 15:42:47,882 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 199 predicate places. [2024-06-20 15:42:47,882 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 593 transitions, 9729 flow [2024-06-20 15:42:47,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:47,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:47,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:47,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 15:42:47,882 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:42:47,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:47,883 INFO L85 PathProgramCache]: Analyzing trace with hash -235712115, now seen corresponding path program 16 times [2024-06-20 15:42:47,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:47,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026422756] [2024-06-20 15:42:47,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:47,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:47,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:48,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:42:48,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:48,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026422756] [2024-06-20 15:42:48,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026422756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:48,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:48,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:42:48,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696898993] [2024-06-20 15:42:48,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:48,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:42:48,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:48,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:42:48,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:42:49,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:42:49,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 593 transitions, 9729 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:49,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:49,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:42:49,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:50,629 INFO L124 PetriNetUnfolderBase]: 4860/7434 cut-off events. [2024-06-20 15:42:50,630 INFO L125 PetriNetUnfolderBase]: For 428168/428200 co-relation queries the response was YES. [2024-06-20 15:42:50,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63007 conditions, 7434 events. 4860/7434 cut-off events. For 428168/428200 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 43573 event pairs, 1373 based on Foata normal form. 18/7419 useless extension candidates. Maximal degree in co-relation 62901. Up to 6075 conditions per place. [2024-06-20 15:42:50,718 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 431 selfloop transitions, 209 changer transitions 0/649 dead transitions. [2024-06-20 15:42:50,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 649 transitions, 11860 flow [2024-06-20 15:42:50,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:42:50,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:42:50,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-20 15:42:50,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4754521963824289 [2024-06-20 15:42:50,720 INFO L175 Difference]: Start difference. First operand has 243 places, 593 transitions, 9729 flow. Second operand 9 states and 184 transitions. [2024-06-20 15:42:50,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 649 transitions, 11860 flow [2024-06-20 15:42:51,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 649 transitions, 11529 flow, removed 130 selfloop flow, removed 4 redundant places. [2024-06-20 15:42:51,364 INFO L231 Difference]: Finished difference. Result has 249 places, 608 transitions, 10364 flow [2024-06-20 15:42:51,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9398, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10364, PETRI_PLACES=249, PETRI_TRANSITIONS=608} [2024-06-20 15:42:51,365 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 205 predicate places. [2024-06-20 15:42:51,365 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 608 transitions, 10364 flow [2024-06-20 15:42:51,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:51,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:51,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:51,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 15:42:51,366 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)] === [2024-06-20 15:42:51,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:51,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1667104623, now seen corresponding path program 2 times [2024-06-20 15:42:51,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:51,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511656103] [2024-06-20 15:42:51,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:51,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:51,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:52,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:42:52,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:52,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511656103] [2024-06-20 15:42:52,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511656103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:52,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:52,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:42:52,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321996710] [2024-06-20 15:42:52,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:52,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:42:52,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:52,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:42:52,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:42:52,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:42:52,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 608 transitions, 10364 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:52,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:52,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:42:52,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:53,669 INFO L124 PetriNetUnfolderBase]: 5296/8036 cut-off events. [2024-06-20 15:42:53,670 INFO L125 PetriNetUnfolderBase]: For 466270/466585 co-relation queries the response was YES. [2024-06-20 15:42:53,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67807 conditions, 8036 events. 5296/8036 cut-off events. For 466270/466585 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 46323 event pairs, 1753 based on Foata normal form. 175/8113 useless extension candidates. Maximal degree in co-relation 67698. Up to 7359 conditions per place. [2024-06-20 15:42:53,766 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 479 selfloop transitions, 23 changer transitions 0/625 dead transitions. [2024-06-20 15:42:53,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 625 transitions, 11550 flow [2024-06-20 15:42:53,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:42:53,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:42:53,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-20 15:42:53,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-20 15:42:53,767 INFO L175 Difference]: Start difference. First operand has 249 places, 608 transitions, 10364 flow. Second operand 6 states and 116 transitions. [2024-06-20 15:42:53,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 625 transitions, 11550 flow [2024-06-20 15:42:54,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 625 transitions, 11243 flow, removed 82 selfloop flow, removed 6 redundant places. [2024-06-20 15:42:54,492 INFO L231 Difference]: Finished difference. Result has 249 places, 611 transitions, 10147 flow [2024-06-20 15:42:54,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10059, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10147, PETRI_PLACES=249, PETRI_TRANSITIONS=611} [2024-06-20 15:42:54,493 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 205 predicate places. [2024-06-20 15:42:54,493 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 611 transitions, 10147 flow [2024-06-20 15:42:54,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:54,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:54,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:54,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 15:42:54,497 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:42:54,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:54,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1040904751, now seen corresponding path program 17 times [2024-06-20 15:42:54,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:54,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102213013] [2024-06-20 15:42:54,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:54,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:54,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:55,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:42:55,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:55,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102213013] [2024-06-20 15:42:55,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102213013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:55,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:55,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:42:55,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698542230] [2024-06-20 15:42:55,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:55,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:42:55,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:55,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:42:55,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:42:55,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:42:55,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 611 transitions, 10147 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:55,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:55,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:42:55,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:57,255 INFO L124 PetriNetUnfolderBase]: 5072/7758 cut-off events. [2024-06-20 15:42:57,255 INFO L125 PetriNetUnfolderBase]: For 462907/462931 co-relation queries the response was YES. [2024-06-20 15:42:57,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66757 conditions, 7758 events. 5072/7758 cut-off events. For 462907/462931 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 45970 event pairs, 1651 based on Foata normal form. 19/7736 useless extension candidates. Maximal degree in co-relation 66647. Up to 7065 conditions per place. [2024-06-20 15:42:57,364 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 586 selfloop transitions, 67 changer transitions 0/663 dead transitions. [2024-06-20 15:42:57,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 663 transitions, 12141 flow [2024-06-20 15:42:57,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:42:57,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:42:57,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-20 15:42:57,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-20 15:42:57,365 INFO L175 Difference]: Start difference. First operand has 249 places, 611 transitions, 10147 flow. Second operand 9 states and 172 transitions. [2024-06-20 15:42:57,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 663 transitions, 12141 flow [2024-06-20 15:42:58,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 663 transitions, 12089 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-20 15:42:58,082 INFO L231 Difference]: Finished difference. Result has 254 places, 624 transitions, 10665 flow [2024-06-20 15:42:58,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10095, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10665, PETRI_PLACES=254, PETRI_TRANSITIONS=624} [2024-06-20 15:42:58,082 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 210 predicate places. [2024-06-20 15:42:58,082 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 624 transitions, 10665 flow [2024-06-20 15:42:58,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:58,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:58,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:58,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 15:42:58,083 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)] === [2024-06-20 15:42:58,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:58,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1464832371, now seen corresponding path program 1 times [2024-06-20 15:42:58,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:58,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989116805] [2024-06-20 15:42:58,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:58,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:58,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:58,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:42:58,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:58,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989116805] [2024-06-20 15:42:58,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989116805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:58,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:58,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:42:58,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243418399] [2024-06-20 15:42:58,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:58,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:42:58,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:58,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:42:58,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:42:58,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:42:58,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 624 transitions, 10665 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:42:58,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:58,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:42:58,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:00,632 INFO L124 PetriNetUnfolderBase]: 5432/8251 cut-off events. [2024-06-20 15:43:00,632 INFO L125 PetriNetUnfolderBase]: For 478441/478782 co-relation queries the response was YES. [2024-06-20 15:43:00,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69971 conditions, 8251 events. 5432/8251 cut-off events. For 478441/478782 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 47863 event pairs, 1787 based on Foata normal form. 193/8341 useless extension candidates. Maximal degree in co-relation 69861. Up to 7562 conditions per place. [2024-06-20 15:43:00,737 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 499 selfloop transitions, 30 changer transitions 0/652 dead transitions. [2024-06-20 15:43:00,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 652 transitions, 11953 flow [2024-06-20 15:43:00,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:43:00,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:43:00,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-20 15:43:00,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-20 15:43:00,738 INFO L175 Difference]: Start difference. First operand has 254 places, 624 transitions, 10665 flow. Second operand 7 states and 136 transitions. [2024-06-20 15:43:00,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 652 transitions, 11953 flow [2024-06-20 15:43:01,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 652 transitions, 11605 flow, removed 116 selfloop flow, removed 7 redundant places. [2024-06-20 15:43:01,511 INFO L231 Difference]: Finished difference. Result has 255 places, 633 transitions, 10475 flow [2024-06-20 15:43:01,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10317, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=597, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10475, PETRI_PLACES=255, PETRI_TRANSITIONS=633} [2024-06-20 15:43:01,511 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 211 predicate places. [2024-06-20 15:43:01,512 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 633 transitions, 10475 flow [2024-06-20 15:43:01,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:43:01,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:01,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:01,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 15:43:01,512 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:43:01,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:01,513 INFO L85 PathProgramCache]: Analyzing trace with hash 899198147, now seen corresponding path program 18 times [2024-06-20 15:43:01,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:01,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589529173] [2024-06-20 15:43:01,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:01,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:01,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:02,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:43:02,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:02,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589529173] [2024-06-20 15:43:02,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589529173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:02,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:02,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:43:02,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782061783] [2024-06-20 15:43:02,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:02,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:43:02,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:02,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:43:02,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:43:02,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:43:02,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 633 transitions, 10475 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:43:02,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:02,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:43:02,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:04,303 INFO L124 PetriNetUnfolderBase]: 5155/7891 cut-off events. [2024-06-20 15:43:04,304 INFO L125 PetriNetUnfolderBase]: For 484154/484185 co-relation queries the response was YES. [2024-06-20 15:43:04,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68269 conditions, 7891 events. 5155/7891 cut-off events. For 484154/484185 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 46792 event pairs, 1667 based on Foata normal form. 26/7875 useless extension candidates. Maximal degree in co-relation 68157. Up to 7181 conditions per place. [2024-06-20 15:43:04,406 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 614 selfloop transitions, 52 changer transitions 0/676 dead transitions. [2024-06-20 15:43:04,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 676 transitions, 12333 flow [2024-06-20 15:43:04,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:43:04,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:43:04,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-20 15:43:04,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-20 15:43:04,408 INFO L175 Difference]: Start difference. First operand has 255 places, 633 transitions, 10475 flow. Second operand 9 states and 169 transitions. [2024-06-20 15:43:04,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 676 transitions, 12333 flow [2024-06-20 15:43:05,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 676 transitions, 12299 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-20 15:43:05,204 INFO L231 Difference]: Finished difference. Result has 262 places, 641 transitions, 10848 flow [2024-06-20 15:43:05,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10441, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=581, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10848, PETRI_PLACES=262, PETRI_TRANSITIONS=641} [2024-06-20 15:43:05,205 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 218 predicate places. [2024-06-20 15:43:05,205 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 641 transitions, 10848 flow [2024-06-20 15:43:05,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:43:05,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:05,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:05,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 15:43:05,205 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:43:05,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:05,206 INFO L85 PathProgramCache]: Analyzing trace with hash -136650779, now seen corresponding path program 19 times [2024-06-20 15:43:05,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:05,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600285244] [2024-06-20 15:43:05,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:05,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:05,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:06,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:43:06,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:06,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600285244] [2024-06-20 15:43:06,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600285244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:06,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:06,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:43:06,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32392762] [2024-06-20 15:43:06,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:06,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:43:06,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:06,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:43:06,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:43:06,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:43:06,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 641 transitions, 10848 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:43:06,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:06,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:43:06,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:08,309 INFO L124 PetriNetUnfolderBase]: 5152/7877 cut-off events. [2024-06-20 15:43:08,309 INFO L125 PetriNetUnfolderBase]: For 490192/490215 co-relation queries the response was YES. [2024-06-20 15:43:08,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68895 conditions, 7877 events. 5152/7877 cut-off events. For 490192/490215 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 46669 event pairs, 1629 based on Foata normal form. 8/7844 useless extension candidates. Maximal degree in co-relation 68780. Up to 6956 conditions per place. [2024-06-20 15:43:08,415 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 568 selfloop transitions, 127 changer transitions 0/705 dead transitions. [2024-06-20 15:43:08,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 705 transitions, 13460 flow [2024-06-20 15:43:08,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:43:08,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:43:08,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-20 15:43:08,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325581395348837 [2024-06-20 15:43:08,417 INFO L175 Difference]: Start difference. First operand has 262 places, 641 transitions, 10848 flow. Second operand 10 states and 186 transitions. [2024-06-20 15:43:08,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 705 transitions, 13460 flow [2024-06-20 15:43:09,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 705 transitions, 12877 flow, removed 199 selfloop flow, removed 8 redundant places. [2024-06-20 15:43:09,407 INFO L231 Difference]: Finished difference. Result has 265 places, 666 transitions, 11388 flow [2024-06-20 15:43:09,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10411, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11388, PETRI_PLACES=265, PETRI_TRANSITIONS=666} [2024-06-20 15:43:09,408 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 221 predicate places. [2024-06-20 15:43:09,408 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 666 transitions, 11388 flow [2024-06-20 15:43:09,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:43:09,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:09,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:09,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 15:43:09,409 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:43:09,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:09,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1040702941, now seen corresponding path program 20 times [2024-06-20 15:43:09,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:09,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869927731] [2024-06-20 15:43:09,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:09,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:09,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:10,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:43:10,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:10,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869927731] [2024-06-20 15:43:10,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869927731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:10,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:10,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:43:10,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847207176] [2024-06-20 15:43:10,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:10,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:43:10,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:10,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:43:10,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:43:10,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:43:10,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 666 transitions, 11388 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:43:10,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:10,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:43:10,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:12,641 INFO L124 PetriNetUnfolderBase]: 5130/7853 cut-off events. [2024-06-20 15:43:12,649 INFO L125 PetriNetUnfolderBase]: For 494742/494765 co-relation queries the response was YES. [2024-06-20 15:43:12,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68433 conditions, 7853 events. 5130/7853 cut-off events. For 494742/494765 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 46538 event pairs, 1652 based on Foata normal form. 8/7820 useless extension candidates. Maximal degree in co-relation 68317. Up to 6938 conditions per place. [2024-06-20 15:43:12,739 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 578 selfloop transitions, 118 changer transitions 0/706 dead transitions. [2024-06-20 15:43:12,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 706 transitions, 13115 flow [2024-06-20 15:43:12,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:43:12,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:43:12,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-20 15:43:12,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-20 15:43:12,745 INFO L175 Difference]: Start difference. First operand has 265 places, 666 transitions, 11388 flow. Second operand 9 states and 174 transitions. [2024-06-20 15:43:12,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 706 transitions, 13115 flow [2024-06-20 15:43:13,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 706 transitions, 12472 flow, removed 229 selfloop flow, removed 8 redundant places. [2024-06-20 15:43:13,656 INFO L231 Difference]: Finished difference. Result has 266 places, 668 transitions, 11036 flow [2024-06-20 15:43:13,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10765, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11036, PETRI_PLACES=266, PETRI_TRANSITIONS=668} [2024-06-20 15:43:13,657 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 222 predicate places. [2024-06-20 15:43:13,657 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 668 transitions, 11036 flow [2024-06-20 15:43:13,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:43:13,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:13,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:13,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-20 15:43:13,658 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:43:13,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:13,659 INFO L85 PathProgramCache]: Analyzing trace with hash 908729283, now seen corresponding path program 1 times [2024-06-20 15:43:13,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:13,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766522932] [2024-06-20 15:43:13,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:13,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:13,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:14,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:43:14,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:14,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766522932] [2024-06-20 15:43:14,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766522932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:14,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:14,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:43:14,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649857911] [2024-06-20 15:43:14,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:14,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:43:14,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:14,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:43:14,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:43:15,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 15:43:15,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 668 transitions, 11036 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:43:15,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:15,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 15:43:15,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:17,254 INFO L124 PetriNetUnfolderBase]: 6164/9206 cut-off events. [2024-06-20 15:43:17,254 INFO L125 PetriNetUnfolderBase]: For 517071/517082 co-relation queries the response was YES. [2024-06-20 15:43:17,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76604 conditions, 9206 events. 6164/9206 cut-off events. For 517071/517082 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 52313 event pairs, 2209 based on Foata normal form. 2/9178 useless extension candidates. Maximal degree in co-relation 76488. Up to 8834 conditions per place. [2024-06-20 15:43:17,371 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 667 selfloop transitions, 31 changer transitions 0/706 dead transitions. [2024-06-20 15:43:17,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 706 transitions, 12850 flow [2024-06-20 15:43:17,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:43:17,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:43:17,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-20 15:43:17,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-20 15:43:17,372 INFO L175 Difference]: Start difference. First operand has 266 places, 668 transitions, 11036 flow. Second operand 9 states and 153 transitions. [2024-06-20 15:43:17,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 706 transitions, 12850 flow [2024-06-20 15:43:18,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 706 transitions, 12601 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-20 15:43:18,324 INFO L231 Difference]: Finished difference. Result has 269 places, 681 transitions, 11158 flow [2024-06-20 15:43:18,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10803, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=637, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11158, PETRI_PLACES=269, PETRI_TRANSITIONS=681} [2024-06-20 15:43:18,326 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 225 predicate places. [2024-06-20 15:43:18,327 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 681 transitions, 11158 flow [2024-06-20 15:43:18,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:43:18,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:18,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:18,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-20 15:43:18,327 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:43:18,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:18,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1653772143, now seen corresponding path program 3 times [2024-06-20 15:43:18,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:18,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391074719] [2024-06-20 15:43:18,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:18,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:18,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:19,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:43:19,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:19,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391074719] [2024-06-20 15:43:19,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391074719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:19,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:19,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:43:19,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268526124] [2024-06-20 15:43:19,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:19,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:43:19,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:19,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:43:19,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:43:19,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:43:19,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 681 transitions, 11158 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:43:19,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:19,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:43:19,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:20,867 INFO L124 PetriNetUnfolderBase]: 5620/8429 cut-off events. [2024-06-20 15:43:20,867 INFO L125 PetriNetUnfolderBase]: For 556239/556911 co-relation queries the response was YES. [2024-06-20 15:43:20,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71368 conditions, 8429 events. 5620/8429 cut-off events. For 556239/556911 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 48257 event pairs, 1884 based on Foata normal form. 397/8651 useless extension candidates. Maximal degree in co-relation 71251. Up to 7828 conditions per place. [2024-06-20 15:43:20,977 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 554 selfloop transitions, 12 changer transitions 0/689 dead transitions. [2024-06-20 15:43:20,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 689 transitions, 12324 flow [2024-06-20 15:43:20,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:43:20,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:43:20,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-20 15:43:20,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41472868217054265 [2024-06-20 15:43:20,978 INFO L175 Difference]: Start difference. First operand has 269 places, 681 transitions, 11158 flow. Second operand 6 states and 107 transitions. [2024-06-20 15:43:20,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 689 transitions, 12324 flow [2024-06-20 15:43:22,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 689 transitions, 12223 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-20 15:43:22,180 INFO L231 Difference]: Finished difference. Result has 268 places, 681 transitions, 11087 flow [2024-06-20 15:43:22,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11057, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=669, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=11087, PETRI_PLACES=268, PETRI_TRANSITIONS=681} [2024-06-20 15:43:22,181 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 224 predicate places. [2024-06-20 15:43:22,181 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 681 transitions, 11087 flow [2024-06-20 15:43:22,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:43:22,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:22,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:22,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-20 15:43:22,181 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:43:22,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:22,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1660431439, now seen corresponding path program 1 times [2024-06-20 15:43:22,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:22,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145724525] [2024-06-20 15:43:22,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:22,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:22,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:22,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:43:22,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:22,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145724525] [2024-06-20 15:43:22,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145724525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:22,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:22,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:43:22,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845019664] [2024-06-20 15:43:22,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:22,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:43:22,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:22,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:43:22,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:43:22,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 15:43:22,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 681 transitions, 11087 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:43:22,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:22,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 15:43:22,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:24,885 INFO L124 PetriNetUnfolderBase]: 6342/9393 cut-off events. [2024-06-20 15:43:24,886 INFO L125 PetriNetUnfolderBase]: For 532781/532781 co-relation queries the response was YES. [2024-06-20 15:43:24,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77394 conditions, 9393 events. 6342/9393 cut-off events. For 532781/532781 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 52457 event pairs, 2306 based on Foata normal form. 1/9392 useless extension candidates. Maximal degree in co-relation 77276. Up to 9197 conditions per place. [2024-06-20 15:43:24,995 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 679 selfloop transitions, 17 changer transitions 0/699 dead transitions. [2024-06-20 15:43:24,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 699 transitions, 12695 flow [2024-06-20 15:43:24,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:43:24,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:43:24,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-20 15:43:24,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3992248062015504 [2024-06-20 15:43:24,997 INFO L175 Difference]: Start difference. First operand has 268 places, 681 transitions, 11087 flow. Second operand 6 states and 103 transitions. [2024-06-20 15:43:24,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 699 transitions, 12695 flow [2024-06-20 15:43:25,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 699 transitions, 12655 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-20 15:43:25,964 INFO L231 Difference]: Finished difference. Result has 269 places, 687 transitions, 11153 flow [2024-06-20 15:43:25,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11047, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=667, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=11153, PETRI_PLACES=269, PETRI_TRANSITIONS=687} [2024-06-20 15:43:25,965 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 225 predicate places. [2024-06-20 15:43:25,965 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 687 transitions, 11153 flow [2024-06-20 15:43:25,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:43:25,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:25,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:25,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-20 15:43:25,970 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)] === [2024-06-20 15:43:25,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:25,970 INFO L85 PathProgramCache]: Analyzing trace with hash -280102189, now seen corresponding path program 2 times [2024-06-20 15:43:25,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:25,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805758552] [2024-06-20 15:43:25,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:25,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:25,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:26,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:43:26,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:26,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805758552] [2024-06-20 15:43:26,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805758552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:26,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:26,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:43:26,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610612489] [2024-06-20 15:43:26,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:26,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:43:26,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:26,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:43:26,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:43:26,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-20 15:43:26,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 687 transitions, 11153 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:43:26,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:26,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-20 15:43:26,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:28,963 INFO L124 PetriNetUnfolderBase]: 6339/9390 cut-off events. [2024-06-20 15:43:28,964 INFO L125 PetriNetUnfolderBase]: For 549194/549197 co-relation queries the response was YES. [2024-06-20 15:43:29,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78052 conditions, 9390 events. 6339/9390 cut-off events. For 549194/549197 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 52476 event pairs, 2309 based on Foata normal form. 3/9390 useless extension candidates. Maximal degree in co-relation 77933. Up to 9194 conditions per place. [2024-06-20 15:43:29,087 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 675 selfloop transitions, 17 changer transitions 0/695 dead transitions. [2024-06-20 15:43:29,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 695 transitions, 12571 flow [2024-06-20 15:43:29,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:43:29,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:43:29,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-20 15:43:29,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-20 15:43:29,088 INFO L175 Difference]: Start difference. First operand has 269 places, 687 transitions, 11153 flow. Second operand 6 states and 99 transitions. [2024-06-20 15:43:29,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 695 transitions, 12571 flow [2024-06-20 15:43:30,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 695 transitions, 12524 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-20 15:43:30,215 INFO L231 Difference]: Finished difference. Result has 273 places, 687 transitions, 11146 flow [2024-06-20 15:43:30,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11106, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=687, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=670, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=11146, PETRI_PLACES=273, PETRI_TRANSITIONS=687} [2024-06-20 15:43:30,218 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 229 predicate places. [2024-06-20 15:43:30,218 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 687 transitions, 11146 flow [2024-06-20 15:43:30,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:43:30,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:30,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:30,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-20 15:43:30,219 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:43:30,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:30,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1032913447, now seen corresponding path program 1 times [2024-06-20 15:43:30,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:30,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777265683] [2024-06-20 15:43:30,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:30,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:30,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:31,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:43:31,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:31,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777265683] [2024-06-20 15:43:31,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777265683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:31,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:31,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:43:31,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632896310] [2024-06-20 15:43:31,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:31,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:43:31,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:31,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:43:31,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:43:31,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:43:31,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 687 transitions, 11146 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:43:31,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:31,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:43:31,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:33,325 INFO L124 PetriNetUnfolderBase]: 5321/8110 cut-off events. [2024-06-20 15:43:33,326 INFO L125 PetriNetUnfolderBase]: For 594574/594611 co-relation queries the response was YES. [2024-06-20 15:43:33,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71563 conditions, 8110 events. 5321/8110 cut-off events. For 594574/594611 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 48518 event pairs, 1338 based on Foata normal form. 10/8064 useless extension candidates. Maximal degree in co-relation 71442. Up to 7284 conditions per place. [2024-06-20 15:43:33,427 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 613 selfloop transitions, 120 changer transitions 0/745 dead transitions. [2024-06-20 15:43:33,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 745 transitions, 13173 flow [2024-06-20 15:43:33,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:43:33,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:43:33,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 234 transitions. [2024-06-20 15:43:33,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-20 15:43:33,428 INFO L175 Difference]: Start difference. First operand has 273 places, 687 transitions, 11146 flow. Second operand 12 states and 234 transitions. [2024-06-20 15:43:33,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 745 transitions, 13173 flow [2024-06-20 15:43:34,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 745 transitions, 13125 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-20 15:43:34,526 INFO L231 Difference]: Finished difference. Result has 281 places, 693 transitions, 11474 flow [2024-06-20 15:43:34,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11098, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=687, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=569, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11474, PETRI_PLACES=281, PETRI_TRANSITIONS=693} [2024-06-20 15:43:34,527 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 237 predicate places. [2024-06-20 15:43:34,527 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 693 transitions, 11474 flow [2024-06-20 15:43:34,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:43:34,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:34,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:34,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-20 15:43:34,527 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:43:34,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:34,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1032852997, now seen corresponding path program 2 times [2024-06-20 15:43:34,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:34,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88804975] [2024-06-20 15:43:34,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:34,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:34,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:35,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:43:35,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:35,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88804975] [2024-06-20 15:43:35,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88804975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:35,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:35,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:43:35,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744778554] [2024-06-20 15:43:35,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:35,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:43:35,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:35,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:43:35,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:43:35,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:43:35,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 693 transitions, 11474 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:43:35,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:35,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:43:35,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:37,918 INFO L124 PetriNetUnfolderBase]: 5283/8076 cut-off events. [2024-06-20 15:43:37,919 INFO L125 PetriNetUnfolderBase]: For 591056/591085 co-relation queries the response was YES. [2024-06-20 15:43:37,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71648 conditions, 8076 events. 5283/8076 cut-off events. For 591056/591085 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 48301 event pairs, 1364 based on Foata normal form. 10/8048 useless extension candidates. Maximal degree in co-relation 71525. Up to 7293 conditions per place. [2024-06-20 15:43:38,020 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 615 selfloop transitions, 116 changer transitions 0/743 dead transitions. [2024-06-20 15:43:38,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 743 transitions, 13244 flow [2024-06-20 15:43:38,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:43:38,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:43:38,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 229 transitions. [2024-06-20 15:43:38,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4437984496124031 [2024-06-20 15:43:38,022 INFO L175 Difference]: Start difference. First operand has 281 places, 693 transitions, 11474 flow. Second operand 12 states and 229 transitions. [2024-06-20 15:43:38,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 743 transitions, 13244 flow [2024-06-20 15:43:39,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 743 transitions, 13004 flow, removed 49 selfloop flow, removed 8 redundant places. [2024-06-20 15:43:39,125 INFO L231 Difference]: Finished difference. Result has 285 places, 695 transitions, 11535 flow [2024-06-20 15:43:39,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11260, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=693, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11535, PETRI_PLACES=285, PETRI_TRANSITIONS=695} [2024-06-20 15:43:39,125 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 241 predicate places. [2024-06-20 15:43:39,125 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 695 transitions, 11535 flow [2024-06-20 15:43:39,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:43:39,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:39,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:39,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-20 15:43:39,126 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:43:39,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:39,126 INFO L85 PathProgramCache]: Analyzing trace with hash -751647809, now seen corresponding path program 3 times [2024-06-20 15:43:39,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:39,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518353384] [2024-06-20 15:43:39,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:39,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:39,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:40,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:43:40,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:40,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518353384] [2024-06-20 15:43:40,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518353384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:40,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:40,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:43:40,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952245954] [2024-06-20 15:43:40,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:40,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:43:40,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:40,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:43:40,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:43:40,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:43:40,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 695 transitions, 11535 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:43:40,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:40,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:43:40,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:42,189 INFO L124 PetriNetUnfolderBase]: 5447/8316 cut-off events. [2024-06-20 15:43:42,189 INFO L125 PetriNetUnfolderBase]: For 646243/646278 co-relation queries the response was YES. [2024-06-20 15:43:42,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74486 conditions, 8316 events. 5447/8316 cut-off events. For 646243/646278 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 50119 event pairs, 1229 based on Foata normal form. 10/8274 useless extension candidates. Maximal degree in co-relation 74361. Up to 7302 conditions per place. [2024-06-20 15:43:42,299 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 611 selfloop transitions, 135 changer transitions 0/758 dead transitions. [2024-06-20 15:43:42,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 758 transitions, 13808 flow [2024-06-20 15:43:42,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:43:42,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:43:42,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 216 transitions. [2024-06-20 15:43:42,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45665961945031713 [2024-06-20 15:43:42,301 INFO L175 Difference]: Start difference. First operand has 285 places, 695 transitions, 11535 flow. Second operand 11 states and 216 transitions. [2024-06-20 15:43:42,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 758 transitions, 13808 flow [2024-06-20 15:43:43,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 758 transitions, 13539 flow, removed 20 selfloop flow, removed 10 redundant places. [2024-06-20 15:43:43,532 INFO L231 Difference]: Finished difference. Result has 288 places, 712 transitions, 11858 flow [2024-06-20 15:43:43,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11288, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11858, PETRI_PLACES=288, PETRI_TRANSITIONS=712} [2024-06-20 15:43:43,533 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 244 predicate places. [2024-06-20 15:43:43,533 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 712 transitions, 11858 flow [2024-06-20 15:43:43,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:43:43,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:43,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:43,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-20 15:43:43,533 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:43:43,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:43,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1814798459, now seen corresponding path program 4 times [2024-06-20 15:43:43,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:43,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898983233] [2024-06-20 15:43:43,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:43,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:43,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:44,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:43:44,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:44,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898983233] [2024-06-20 15:43:44,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898983233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:44,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:44,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:43:44,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556779646] [2024-06-20 15:43:44,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:44,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:43:44,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:44,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:43:44,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:43:44,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:43:44,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 712 transitions, 11858 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:43:44,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:44,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:43:44,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:47,104 INFO L124 PetriNetUnfolderBase]: 5569/8535 cut-off events. [2024-06-20 15:43:47,104 INFO L125 PetriNetUnfolderBase]: For 658101/658138 co-relation queries the response was YES. [2024-06-20 15:43:47,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76550 conditions, 8535 events. 5569/8535 cut-off events. For 658101/658138 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 51819 event pairs, 1468 based on Foata normal form. 14/8511 useless extension candidates. Maximal degree in co-relation 76422. Up to 7736 conditions per place. [2024-06-20 15:43:47,220 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 682 selfloop transitions, 96 changer transitions 0/790 dead transitions. [2024-06-20 15:43:47,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 790 transitions, 14362 flow [2024-06-20 15:43:47,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:43:47,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:43:47,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 232 transitions. [2024-06-20 15:43:47,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-20 15:43:47,222 INFO L175 Difference]: Start difference. First operand has 288 places, 712 transitions, 11858 flow. Second operand 12 states and 232 transitions. [2024-06-20 15:43:47,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 790 transitions, 14362 flow [2024-06-20 15:43:48,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 790 transitions, 13925 flow, removed 151 selfloop flow, removed 7 redundant places. [2024-06-20 15:43:48,438 INFO L231 Difference]: Finished difference. Result has 296 places, 742 transitions, 12271 flow [2024-06-20 15:43:48,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11599, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=712, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=624, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=12271, PETRI_PLACES=296, PETRI_TRANSITIONS=742} [2024-06-20 15:43:48,439 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 252 predicate places. [2024-06-20 15:43:48,439 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 742 transitions, 12271 flow [2024-06-20 15:43:48,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:43:48,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:48,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:48,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-20 15:43:48,439 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:43:48,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:48,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1814858909, now seen corresponding path program 5 times [2024-06-20 15:43:48,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:48,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211895494] [2024-06-20 15:43:48,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:48,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:48,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:49,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:43:49,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:49,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211895494] [2024-06-20 15:43:49,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211895494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:49,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:49,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:43:49,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380157554] [2024-06-20 15:43:49,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:49,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:43:49,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:49,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:43:49,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:43:49,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:43:49,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 742 transitions, 12271 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:43:49,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:49,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:43:49,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:51,816 INFO L124 PetriNetUnfolderBase]: 5581/8547 cut-off events. [2024-06-20 15:43:51,816 INFO L125 PetriNetUnfolderBase]: For 680065/680106 co-relation queries the response was YES. [2024-06-20 15:43:51,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76548 conditions, 8547 events. 5581/8547 cut-off events. For 680065/680106 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 51836 event pairs, 1487 based on Foata normal form. 14/8517 useless extension candidates. Maximal degree in co-relation 76416. Up to 7822 conditions per place. [2024-06-20 15:43:51,948 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 673 selfloop transitions, 91 changer transitions 0/776 dead transitions. [2024-06-20 15:43:51,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 776 transitions, 13943 flow [2024-06-20 15:43:51,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:43:51,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:43:51,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-20 15:43:51,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-20 15:43:51,950 INFO L175 Difference]: Start difference. First operand has 296 places, 742 transitions, 12271 flow. Second operand 10 states and 196 transitions. [2024-06-20 15:43:51,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 776 transitions, 13943 flow [2024-06-20 15:43:53,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 776 transitions, 13814 flow, removed 57 selfloop flow, removed 3 redundant places. [2024-06-20 15:43:53,093 INFO L231 Difference]: Finished difference. Result has 303 places, 742 transitions, 12340 flow [2024-06-20 15:43:53,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12142, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=651, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12340, PETRI_PLACES=303, PETRI_TRANSITIONS=742} [2024-06-20 15:43:53,094 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 259 predicate places. [2024-06-20 15:43:53,094 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 742 transitions, 12340 flow [2024-06-20 15:43:53,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:43:53,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:53,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:53,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-20 15:43:53,094 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:43:53,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:53,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1171867909, now seen corresponding path program 6 times [2024-06-20 15:43:53,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:53,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007912376] [2024-06-20 15:43:53,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:53,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:53,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:54,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:43:54,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:54,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007912376] [2024-06-20 15:43:54,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007912376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:54,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:54,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:43:54,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404609140] [2024-06-20 15:43:54,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:54,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:43:54,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:54,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:43:54,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:43:54,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:43:54,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 742 transitions, 12340 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:43:54,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:54,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:43:54,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:56,464 INFO L124 PetriNetUnfolderBase]: 5560/8486 cut-off events. [2024-06-20 15:43:56,464 INFO L125 PetriNetUnfolderBase]: For 668773/668804 co-relation queries the response was YES. [2024-06-20 15:43:56,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76304 conditions, 8486 events. 5560/8486 cut-off events. For 668773/668804 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 50771 event pairs, 1254 based on Foata normal form. 10/8472 useless extension candidates. Maximal degree in co-relation 76170. Up to 7417 conditions per place. [2024-06-20 15:43:56,588 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 553 selfloop transitions, 225 changer transitions 0/790 dead transitions. [2024-06-20 15:43:56,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 790 transitions, 14251 flow [2024-06-20 15:43:56,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:43:56,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:43:56,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-20 15:43:56,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-20 15:43:56,590 INFO L175 Difference]: Start difference. First operand has 303 places, 742 transitions, 12340 flow. Second operand 10 states and 200 transitions. [2024-06-20 15:43:56,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 790 transitions, 14251 flow [2024-06-20 15:43:57,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 790 transitions, 14075 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-20 15:43:57,744 INFO L231 Difference]: Finished difference. Result has 305 places, 744 transitions, 12680 flow [2024-06-20 15:43:57,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12164, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12680, PETRI_PLACES=305, PETRI_TRANSITIONS=744} [2024-06-20 15:43:57,744 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 261 predicate places. [2024-06-20 15:43:57,744 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 744 transitions, 12680 flow [2024-06-20 15:43:57,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:43:57,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:57,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:57,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-20 15:43:57,753 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:43:57,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:57,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1404106109, now seen corresponding path program 1 times [2024-06-20 15:43:57,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:57,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108512618] [2024-06-20 15:43:57,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:57,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:57,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:58,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:43:58,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:58,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108512618] [2024-06-20 15:43:58,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108512618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:58,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:58,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:43:58,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9730587] [2024-06-20 15:43:58,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:58,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:43:58,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:58,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:43:58,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:43:58,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:43:58,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 744 transitions, 12680 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) [2024-06-20 15:43:58,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:58,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:43:58,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:44:00,827 INFO L124 PetriNetUnfolderBase]: 5965/9091 cut-off events. [2024-06-20 15:44:00,827 INFO L125 PetriNetUnfolderBase]: For 753465/753883 co-relation queries the response was YES. [2024-06-20 15:44:00,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79991 conditions, 9091 events. 5965/9091 cut-off events. For 753465/753883 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 54211 event pairs, 1827 based on Foata normal form. 242/9201 useless extension candidates. Maximal degree in co-relation 79856. Up to 8113 conditions per place. [2024-06-20 15:44:00,968 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 563 selfloop transitions, 70 changer transitions 0/776 dead transitions. [2024-06-20 15:44:00,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 776 transitions, 14284 flow [2024-06-20 15:44:00,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:44:00,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:44:00,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-20 15:44:00,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-20 15:44:00,969 INFO L175 Difference]: Start difference. First operand has 305 places, 744 transitions, 12680 flow. Second operand 8 states and 158 transitions. [2024-06-20 15:44:00,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 776 transitions, 14284 flow [2024-06-20 15:44:02,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 776 transitions, 13871 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-20 15:44:02,408 INFO L231 Difference]: Finished difference. Result has 306 places, 750 transitions, 12506 flow [2024-06-20 15:44:02,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12267, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=744, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=677, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12506, PETRI_PLACES=306, PETRI_TRANSITIONS=750} [2024-06-20 15:44:02,408 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 262 predicate places. [2024-06-20 15:44:02,409 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 750 transitions, 12506 flow [2024-06-20 15:44:02,409 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) [2024-06-20 15:44:02,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:44:02,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:44:02,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-20 15:44:02,409 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:44:02,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:44:02,409 INFO L85 PathProgramCache]: Analyzing trace with hash 49472537, now seen corresponding path program 7 times [2024-06-20 15:44:02,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:44:02,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053818855] [2024-06-20 15:44:02,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:44:02,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:44:02,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:44:03,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:44:03,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:44:03,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053818855] [2024-06-20 15:44:03,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053818855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:44:03,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:44:03,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:44:03,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165903477] [2024-06-20 15:44:03,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:44:03,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:44:03,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:44:03,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:44:03,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:44:04,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:44:04,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 750 transitions, 12506 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:44:04,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:44:04,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:44:04,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:44:06,691 INFO L124 PetriNetUnfolderBase]: 5787/8880 cut-off events. [2024-06-20 15:44:06,692 INFO L125 PetriNetUnfolderBase]: For 743556/743614 co-relation queries the response was YES. [2024-06-20 15:44:06,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80181 conditions, 8880 events. 5787/8880 cut-off events. For 743556/743614 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 54340 event pairs, 1564 based on Foata normal form. 10/8846 useless extension candidates. Maximal degree in co-relation 80045. Up to 8087 conditions per place. [2024-06-20 15:44:06,799 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 728 selfloop transitions, 85 changer transitions 0/827 dead transitions. [2024-06-20 15:44:06,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 827 transitions, 14991 flow [2024-06-20 15:44:06,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:44:06,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:44:06,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 228 transitions. [2024-06-20 15:44:06,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-20 15:44:06,801 INFO L175 Difference]: Start difference. First operand has 306 places, 750 transitions, 12506 flow. Second operand 12 states and 228 transitions. [2024-06-20 15:44:06,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 827 transitions, 14991 flow [2024-06-20 15:44:07,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 827 transitions, 14886 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-20 15:44:07,930 INFO L231 Difference]: Finished difference. Result has 315 places, 778 transitions, 13059 flow [2024-06-20 15:44:07,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12404, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=750, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=669, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=13059, PETRI_PLACES=315, PETRI_TRANSITIONS=778} [2024-06-20 15:44:07,931 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 271 predicate places. [2024-06-20 15:44:07,931 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 778 transitions, 13059 flow [2024-06-20 15:44:07,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:44:07,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:44:07,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:44:07,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-20 15:44:07,932 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:44:07,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:44:07,932 INFO L85 PathProgramCache]: Analyzing trace with hash 49532987, now seen corresponding path program 8 times [2024-06-20 15:44:07,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:44:07,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607421018] [2024-06-20 15:44:07,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:44:07,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:44:07,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:44:09,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:44:09,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:44:09,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607421018] [2024-06-20 15:44:09,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607421018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:44:09,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:44:09,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:44:09,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631319359] [2024-06-20 15:44:09,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:44:09,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:44:09,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:44:09,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:44:09,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:44:09,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:44:09,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 778 transitions, 13059 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:44:09,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:44:09,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:44:09,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:44:11,725 INFO L124 PetriNetUnfolderBase]: 5768/8858 cut-off events. [2024-06-20 15:44:11,725 INFO L125 PetriNetUnfolderBase]: For 757672/757730 co-relation queries the response was YES. [2024-06-20 15:44:11,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80472 conditions, 8858 events. 5768/8858 cut-off events. For 757672/757730 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 54227 event pairs, 1590 based on Foata normal form. 12/8825 useless extension candidates. Maximal degree in co-relation 80333. Up to 8190 conditions per place. [2024-06-20 15:44:11,852 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 735 selfloop transitions, 65 changer transitions 0/814 dead transitions. [2024-06-20 15:44:11,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 814 transitions, 14854 flow [2024-06-20 15:44:11,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:44:11,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:44:11,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-20 15:44:11,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-20 15:44:11,854 INFO L175 Difference]: Start difference. First operand has 315 places, 778 transitions, 13059 flow. Second operand 10 states and 190 transitions. [2024-06-20 15:44:11,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 814 transitions, 14854 flow [2024-06-20 15:44:13,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 814 transitions, 14698 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-06-20 15:44:13,232 INFO L231 Difference]: Finished difference. Result has 318 places, 778 transitions, 13051 flow [2024-06-20 15:44:13,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12903, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=778, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=713, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13051, PETRI_PLACES=318, PETRI_TRANSITIONS=778} [2024-06-20 15:44:13,233 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 274 predicate places. [2024-06-20 15:44:13,233 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 778 transitions, 13051 flow [2024-06-20 15:44:13,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:44:13,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:44:13,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:44:13,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-20 15:44:13,234 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:44:13,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:44:13,234 INFO L85 PathProgramCache]: Analyzing trace with hash 167620667, now seen corresponding path program 9 times [2024-06-20 15:44:13,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:44:13,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449392542] [2024-06-20 15:44:13,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:44:13,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:44:13,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:44:14,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:44:14,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:44:14,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449392542] [2024-06-20 15:44:14,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449392542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:44:14,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:44:14,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:44:14,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555883772] [2024-06-20 15:44:14,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:44:14,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:44:14,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:44:14,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:44:14,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:44:14,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:44:14,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 778 transitions, 13051 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:44:14,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:44:14,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:44:14,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:44:16,897 INFO L124 PetriNetUnfolderBase]: 5795/8913 cut-off events. [2024-06-20 15:44:16,897 INFO L125 PetriNetUnfolderBase]: For 777148/777211 co-relation queries the response was YES. [2024-06-20 15:44:16,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81192 conditions, 8913 events. 5795/8913 cut-off events. For 777148/777211 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 54926 event pairs, 1531 based on Foata normal form. 10/8871 useless extension candidates. Maximal degree in co-relation 81051. Up to 8095 conditions per place. [2024-06-20 15:44:17,033 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 682 selfloop transitions, 125 changer transitions 0/821 dead transitions. [2024-06-20 15:44:17,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 821 transitions, 14996 flow [2024-06-20 15:44:17,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:44:17,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:44:17,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-20 15:44:17,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-20 15:44:17,035 INFO L175 Difference]: Start difference. First operand has 318 places, 778 transitions, 13051 flow. Second operand 10 states and 196 transitions. [2024-06-20 15:44:17,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 821 transitions, 14996 flow [2024-06-20 15:44:18,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 821 transitions, 14863 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-20 15:44:18,438 INFO L231 Difference]: Finished difference. Result has 321 places, 782 transitions, 13253 flow [2024-06-20 15:44:18,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12918, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=778, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=653, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13253, PETRI_PLACES=321, PETRI_TRANSITIONS=782} [2024-06-20 15:44:18,438 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 277 predicate places. [2024-06-20 15:44:18,439 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 782 transitions, 13253 flow [2024-06-20 15:44:18,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:44:18,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:44:18,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:44:18,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-20 15:44:18,439 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:44:18,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:44:18,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1420275261, now seen corresponding path program 1 times [2024-06-20 15:44:18,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:44:18,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223664439] [2024-06-20 15:44:18,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:44:18,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:44:18,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:44:19,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:44:19,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:44:19,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223664439] [2024-06-20 15:44:19,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223664439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:44:19,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:44:19,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:44:19,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322170005] [2024-06-20 15:44:19,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:44:19,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:44:19,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:44:19,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:44:19,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:44:19,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:44:19,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 782 transitions, 13253 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:44:19,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:44:19,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:44:19,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:44:22,056 INFO L124 PetriNetUnfolderBase]: 5774/8876 cut-off events. [2024-06-20 15:44:22,056 INFO L125 PetriNetUnfolderBase]: For 770104/770165 co-relation queries the response was YES. [2024-06-20 15:44:22,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80681 conditions, 8876 events. 5774/8876 cut-off events. For 770104/770165 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 54524 event pairs, 1530 based on Foata normal form. 22/8849 useless extension candidates. Maximal degree in co-relation 80539. Up to 8107 conditions per place. [2024-06-20 15:44:22,207 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 715 selfloop transitions, 90 changer transitions 0/819 dead transitions. [2024-06-20 15:44:22,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 819 transitions, 15100 flow [2024-06-20 15:44:22,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:44:22,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:44:22,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-20 15:44:22,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45813953488372094 [2024-06-20 15:44:22,209 INFO L175 Difference]: Start difference. First operand has 321 places, 782 transitions, 13253 flow. Second operand 10 states and 197 transitions. [2024-06-20 15:44:22,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 819 transitions, 15100 flow [2024-06-20 15:44:23,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 819 transitions, 14741 flow, removed 58 selfloop flow, removed 8 redundant places. [2024-06-20 15:44:23,955 INFO L231 Difference]: Finished difference. Result has 323 places, 782 transitions, 13096 flow [2024-06-20 15:44:23,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12894, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=782, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=692, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13096, PETRI_PLACES=323, PETRI_TRANSITIONS=782} [2024-06-20 15:44:23,955 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 279 predicate places. [2024-06-20 15:44:23,956 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 782 transitions, 13096 flow [2024-06-20 15:44:23,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:44:23,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:44:23,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:44:23,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-20 15:44:23,956 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:44:23,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:44:23,957 INFO L85 PathProgramCache]: Analyzing trace with hash -185868811, now seen corresponding path program 10 times [2024-06-20 15:44:23,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:44:23,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639089999] [2024-06-20 15:44:23,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:44:23,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:44:23,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:44:25,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:44:25,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:44:25,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639089999] [2024-06-20 15:44:25,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639089999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:44:25,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:44:25,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:44:25,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698884271] [2024-06-20 15:44:25,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:44:25,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:44:25,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:44:25,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:44:25,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:44:25,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:44:25,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 782 transitions, 13096 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:44:25,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:44:25,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:44:25,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:44:27,785 INFO L124 PetriNetUnfolderBase]: 5791/8894 cut-off events. [2024-06-20 15:44:27,785 INFO L125 PetriNetUnfolderBase]: For 784689/784750 co-relation queries the response was YES. [2024-06-20 15:44:27,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81025 conditions, 8894 events. 5791/8894 cut-off events. For 784689/784750 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 54514 event pairs, 1574 based on Foata normal form. 10/8858 useless extension candidates. Maximal degree in co-relation 80882. Up to 8295 conditions per place. [2024-06-20 15:44:27,918 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 755 selfloop transitions, 49 changer transitions 0/818 dead transitions. [2024-06-20 15:44:27,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 818 transitions, 14954 flow [2024-06-20 15:44:27,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:44:27,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:44:27,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-20 15:44:27,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-20 15:44:27,938 INFO L175 Difference]: Start difference. First operand has 323 places, 782 transitions, 13096 flow. Second operand 10 states and 190 transitions. [2024-06-20 15:44:27,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 818 transitions, 14954 flow [2024-06-20 15:44:29,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 818 transitions, 14700 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-20 15:44:29,484 INFO L231 Difference]: Finished difference. Result has 323 places, 784 transitions, 13014 flow [2024-06-20 15:44:29,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12842, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=782, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=733, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13014, PETRI_PLACES=323, PETRI_TRANSITIONS=784} [2024-06-20 15:44:29,485 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 279 predicate places. [2024-06-20 15:44:29,485 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 784 transitions, 13014 flow [2024-06-20 15:44:29,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:44:29,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:44:29,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:44:29,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-20 15:44:29,485 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:44:29,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:44:29,486 INFO L85 PathProgramCache]: Analyzing trace with hash -179188683, now seen corresponding path program 1 times [2024-06-20 15:44:29,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:44:29,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040352656] [2024-06-20 15:44:29,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:44:29,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:44:29,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:44:30,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:44:30,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:44:30,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040352656] [2024-06-20 15:44:30,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040352656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:44:30,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:44:30,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:44:30,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538363902] [2024-06-20 15:44:30,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:44:30,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:44:30,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:44:30,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:44:30,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:44:30,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 15:44:30,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 784 transitions, 13014 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:44:30,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:44:30,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 15:44:30,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:44:33,645 INFO L124 PetriNetUnfolderBase]: 6800/10205 cut-off events. [2024-06-20 15:44:33,646 INFO L125 PetriNetUnfolderBase]: For 843620/843663 co-relation queries the response was YES. [2024-06-20 15:44:33,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90177 conditions, 10205 events. 6800/10205 cut-off events. For 843620/843663 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 60002 event pairs, 1894 based on Foata normal form. 8/10167 useless extension candidates. Maximal degree in co-relation 90033. Up to 9594 conditions per place. [2024-06-20 15:44:33,788 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 731 selfloop transitions, 95 changer transitions 0/838 dead transitions. [2024-06-20 15:44:33,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 838 transitions, 15140 flow [2024-06-20 15:44:33,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:44:33,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:44:33,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-20 15:44:33,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43953488372093025 [2024-06-20 15:44:33,790 INFO L175 Difference]: Start difference. First operand has 323 places, 784 transitions, 13014 flow. Second operand 10 states and 189 transitions. [2024-06-20 15:44:33,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 838 transitions, 15140 flow [2024-06-20 15:44:35,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 838 transitions, 15009 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-20 15:44:35,575 INFO L231 Difference]: Finished difference. Result has 329 places, 802 transitions, 13404 flow [2024-06-20 15:44:35,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12883, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=784, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=703, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13404, PETRI_PLACES=329, PETRI_TRANSITIONS=802} [2024-06-20 15:44:35,576 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 285 predicate places. [2024-06-20 15:44:35,576 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 802 transitions, 13404 flow [2024-06-20 15:44:35,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:44:35,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:44:35,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:44:35,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-20 15:44:35,577 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)] === [2024-06-20 15:44:35,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:44:35,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1023613193, now seen corresponding path program 1 times [2024-06-20 15:44:35,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:44:35,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548775583] [2024-06-20 15:44:35,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:44:35,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:44:35,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:44:36,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:44:36,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:44:36,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548775583] [2024-06-20 15:44:36,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548775583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:44:36,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:44:36,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:44:36,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004956023] [2024-06-20 15:44:36,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:44:36,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:44:36,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:44:36,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:44:36,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:44:36,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:44:36,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 802 transitions, 13404 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) [2024-06-20 15:44:36,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:44:36,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:44:36,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:44:39,279 INFO L124 PetriNetUnfolderBase]: 6306/9648 cut-off events. [2024-06-20 15:44:39,280 INFO L125 PetriNetUnfolderBase]: For 911302/911713 co-relation queries the response was YES. [2024-06-20 15:44:39,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87234 conditions, 9648 events. 6306/9648 cut-off events. For 911302/911713 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 58784 event pairs, 1883 based on Foata normal form. 224/9752 useless extension candidates. Maximal degree in co-relation 87087. Up to 8582 conditions per place. [2024-06-20 15:44:39,435 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 640 selfloop transitions, 64 changer transitions 0/860 dead transitions. [2024-06-20 15:44:39,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 860 transitions, 15628 flow [2024-06-20 15:44:39,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:44:39,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:44:39,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-20 15:44:39,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46770025839793283 [2024-06-20 15:44:39,437 INFO L175 Difference]: Start difference. First operand has 329 places, 802 transitions, 13404 flow. Second operand 9 states and 181 transitions. [2024-06-20 15:44:39,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 860 transitions, 15628 flow [2024-06-20 15:44:41,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 860 transitions, 15445 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-20 15:44:41,452 INFO L231 Difference]: Finished difference. Result has 337 places, 826 transitions, 13678 flow [2024-06-20 15:44:41,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13221, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=802, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=746, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13678, PETRI_PLACES=337, PETRI_TRANSITIONS=826} [2024-06-20 15:44:41,453 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 293 predicate places. [2024-06-20 15:44:41,453 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 826 transitions, 13678 flow [2024-06-20 15:44:41,454 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) [2024-06-20 15:44:41,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:44:41,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:44:41,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-20 15:44:41,454 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:44:41,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:44:41,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1955544702, now seen corresponding path program 1 times [2024-06-20 15:44:41,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:44:41,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057593005] [2024-06-20 15:44:41,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:44:41,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:44:41,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:44:42,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:44:42,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:44:42,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057593005] [2024-06-20 15:44:42,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057593005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:44:42,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:44:42,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:44:42,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364605099] [2024-06-20 15:44:42,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:44:42,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:44:42,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:44:42,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:44:42,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:44:42,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:44:42,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 826 transitions, 13678 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:44:42,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:44:42,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:44:42,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:44:45,290 INFO L124 PetriNetUnfolderBase]: 6193/9528 cut-off events. [2024-06-20 15:44:45,291 INFO L125 PetriNetUnfolderBase]: For 978351/978372 co-relation queries the response was YES. [2024-06-20 15:44:45,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90683 conditions, 9528 events. 6193/9528 cut-off events. For 978351/978372 co-relation queries the response was YES. Maximal size of possible extension queue 606. Compared 59215 event pairs, 1496 based on Foata normal form. 22/9502 useless extension candidates. Maximal degree in co-relation 90531. Up to 7786 conditions per place. [2024-06-20 15:44:45,474 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 731 selfloop transitions, 151 changer transitions 0/899 dead transitions. [2024-06-20 15:44:45,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 899 transitions, 16239 flow [2024-06-20 15:44:45,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 15:44:45,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 15:44:45,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 262 transitions. [2024-06-20 15:44:45,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46869409660107336 [2024-06-20 15:44:45,476 INFO L175 Difference]: Start difference. First operand has 337 places, 826 transitions, 13678 flow. Second operand 13 states and 262 transitions. [2024-06-20 15:44:45,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 899 transitions, 16239 flow [2024-06-20 15:44:47,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 899 transitions, 16176 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-20 15:44:47,309 INFO L231 Difference]: Finished difference. Result has 348 places, 828 transitions, 14025 flow [2024-06-20 15:44:47,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13615, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=826, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=676, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=14025, PETRI_PLACES=348, PETRI_TRANSITIONS=828} [2024-06-20 15:44:47,309 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 304 predicate places. [2024-06-20 15:44:47,309 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 828 transitions, 14025 flow [2024-06-20 15:44:47,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:44:47,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:44:47,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:44:47,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-20 15:44:47,310 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)] === [2024-06-20 15:44:47,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:44:47,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1075358825, now seen corresponding path program 2 times [2024-06-20 15:44:47,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:44:47,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947069704] [2024-06-20 15:44:47,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:44:47,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:44:47,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:44:48,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:44:48,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:44:48,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947069704] [2024-06-20 15:44:48,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947069704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:44:48,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:44:48,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:44:48,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300978516] [2024-06-20 15:44:48,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:44:48,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:44:48,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:44:48,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:44:48,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:44:48,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:44:48,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 828 transitions, 14025 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:44:48,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:44:48,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:44:48,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:44:50,967 INFO L124 PetriNetUnfolderBase]: 6526/10002 cut-off events. [2024-06-20 15:44:50,968 INFO L125 PetriNetUnfolderBase]: For 1029915/1030326 co-relation queries the response was YES. [2024-06-20 15:44:51,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93640 conditions, 10002 events. 6526/10002 cut-off events. For 1029915/1030326 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 61518 event pairs, 2099 based on Foata normal form. 223/10097 useless extension candidates. Maximal degree in co-relation 93486. Up to 9071 conditions per place. [2024-06-20 15:44:51,108 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 660 selfloop transitions, 44 changer transitions 0/860 dead transitions. [2024-06-20 15:44:51,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 860 transitions, 15804 flow [2024-06-20 15:44:51,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:44:51,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:44:51,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-20 15:44:51,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-20 15:44:51,109 INFO L175 Difference]: Start difference. First operand has 348 places, 828 transitions, 14025 flow. Second operand 8 states and 154 transitions. [2024-06-20 15:44:51,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 860 transitions, 15804 flow [2024-06-20 15:44:52,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 860 transitions, 15644 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-20 15:44:52,813 INFO L231 Difference]: Finished difference. Result has 350 places, 836 transitions, 14103 flow [2024-06-20 15:44:52,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13866, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=828, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=785, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14103, PETRI_PLACES=350, PETRI_TRANSITIONS=836} [2024-06-20 15:44:52,814 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 306 predicate places. [2024-06-20 15:44:52,814 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 836 transitions, 14103 flow [2024-06-20 15:44:52,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:44:52,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:44:52,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:44:52,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-20 15:44:52,814 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:44:52,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:44:52,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1187746080, now seen corresponding path program 2 times [2024-06-20 15:44:52,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:44:52,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370303313] [2024-06-20 15:44:52,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:44:52,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:44:52,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:44:54,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:44:54,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:44:54,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370303313] [2024-06-20 15:44:54,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370303313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:44:54,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:44:54,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:44:54,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23726490] [2024-06-20 15:44:54,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:44:54,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:44:54,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:44:54,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:44:54,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:44:54,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:44:54,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 836 transitions, 14103 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:44:54,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:44:54,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:44:54,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:44:57,367 INFO L124 PetriNetUnfolderBase]: 6493/10044 cut-off events. [2024-06-20 15:44:57,367 INFO L125 PetriNetUnfolderBase]: For 1099103/1099152 co-relation queries the response was YES. [2024-06-20 15:44:57,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97928 conditions, 10044 events. 6493/10044 cut-off events. For 1099103/1099152 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 63431 event pairs, 1748 based on Foata normal form. 24/10021 useless extension candidates. Maximal degree in co-relation 97771. Up to 8503 conditions per place. [2024-06-20 15:44:57,531 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 781 selfloop transitions, 112 changer transitions 0/913 dead transitions. [2024-06-20 15:44:57,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 913 transitions, 16769 flow [2024-06-20 15:44:57,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 15:44:57,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 15:44:57,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 260 transitions. [2024-06-20 15:44:57,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-20 15:44:57,533 INFO L175 Difference]: Start difference. First operand has 350 places, 836 transitions, 14103 flow. Second operand 13 states and 260 transitions. [2024-06-20 15:44:57,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 913 transitions, 16769 flow [2024-06-20 15:44:59,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 913 transitions, 16701 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-20 15:44:59,560 INFO L231 Difference]: Finished difference. Result has 360 places, 848 transitions, 14590 flow [2024-06-20 15:44:59,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14035, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=836, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=731, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=14590, PETRI_PLACES=360, PETRI_TRANSITIONS=848} [2024-06-20 15:44:59,561 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 316 predicate places. [2024-06-20 15:44:59,561 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 848 transitions, 14590 flow [2024-06-20 15:44:59,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:44:59,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:44:59,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:44:59,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-20 15:44:59,561 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:44:59,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:44:59,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1075716875, now seen corresponding path program 3 times [2024-06-20 15:44:59,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:44:59,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843222318] [2024-06-20 15:44:59,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:44:59,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:44:59,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:45:00,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:45:00,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:45:00,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843222318] [2024-06-20 15:45:00,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843222318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:45:00,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:45:00,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:45:00,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614316884] [2024-06-20 15:45:00,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:45:00,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:45:00,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:45:00,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:45:00,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:45:00,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:45:00,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 848 transitions, 14590 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:45:00,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:45:00,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:45:00,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:45:03,237 INFO L124 PetriNetUnfolderBase]: 6896/10603 cut-off events. [2024-06-20 15:45:03,238 INFO L125 PetriNetUnfolderBase]: For 1195143/1195525 co-relation queries the response was YES. [2024-06-20 15:45:03,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103430 conditions, 10603 events. 6896/10603 cut-off events. For 1195143/1195525 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 66205 event pairs, 2349 based on Foata normal form. 207/10666 useless extension candidates. Maximal degree in co-relation 103269. Up to 9697 conditions per place. [2024-06-20 15:45:03,437 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 682 selfloop transitions, 29 changer transitions 0/867 dead transitions. [2024-06-20 15:45:03,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 867 transitions, 16106 flow [2024-06-20 15:45:03,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:45:03,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:45:03,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-20 15:45:03,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-20 15:45:03,439 INFO L175 Difference]: Start difference. First operand has 360 places, 848 transitions, 14590 flow. Second operand 8 states and 148 transitions. [2024-06-20 15:45:03,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 867 transitions, 16106 flow [2024-06-20 15:45:06,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 867 transitions, 15989 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-20 15:45:06,114 INFO L231 Difference]: Finished difference. Result has 362 places, 849 transitions, 14551 flow [2024-06-20 15:45:06,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14473, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=848, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=819, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14551, PETRI_PLACES=362, PETRI_TRANSITIONS=849} [2024-06-20 15:45:06,116 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 318 predicate places. [2024-06-20 15:45:06,116 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 849 transitions, 14551 flow [2024-06-20 15:45:06,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:45:06,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:45:06,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:45:06,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-20 15:45:06,117 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:45:06,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:45:06,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1767076478, now seen corresponding path program 3 times [2024-06-20 15:45:06,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:45:06,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75794081] [2024-06-20 15:45:06,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:45:06,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:45:06,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:45:07,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:45:07,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:45:07,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75794081] [2024-06-20 15:45:07,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75794081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:45:07,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:45:07,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:45:07,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442521516] [2024-06-20 15:45:07,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:45:07,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:45:07,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:45:07,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:45:07,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:45:07,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:45:07,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 849 transitions, 14551 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:45:07,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:45:07,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:45:07,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:45:11,181 INFO L124 PetriNetUnfolderBase]: 6688/10369 cut-off events. [2024-06-20 15:45:11,181 INFO L125 PetriNetUnfolderBase]: For 1227289/1227341 co-relation queries the response was YES. [2024-06-20 15:45:11,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103640 conditions, 10369 events. 6688/10369 cut-off events. For 1227289/1227341 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 66131 event pairs, 1351 based on Foata normal form. 20/10339 useless extension candidates. Maximal degree in co-relation 103477. Up to 6853 conditions per place. [2024-06-20 15:45:11,325 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 515 selfloop transitions, 407 changer transitions 0/943 dead transitions. [2024-06-20 15:45:11,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 943 transitions, 17866 flow [2024-06-20 15:45:11,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:45:11,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:45:11,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 239 transitions. [2024-06-20 15:45:11,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5052854122621564 [2024-06-20 15:45:11,327 INFO L175 Difference]: Start difference. First operand has 362 places, 849 transitions, 14551 flow. Second operand 11 states and 239 transitions. [2024-06-20 15:45:11,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 943 transitions, 17866 flow [2024-06-20 15:45:13,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 943 transitions, 17788 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-20 15:45:13,900 INFO L231 Difference]: Finished difference. Result has 367 places, 851 transitions, 15400 flow [2024-06-20 15:45:13,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14473, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=849, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=406, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15400, PETRI_PLACES=367, PETRI_TRANSITIONS=851} [2024-06-20 15:45:13,901 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 323 predicate places. [2024-06-20 15:45:13,901 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 851 transitions, 15400 flow [2024-06-20 15:45:13,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:45:13,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:45:13,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:45:13,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-20 15:45:13,902 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:45:13,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:45:13,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1914149405, now seen corresponding path program 11 times [2024-06-20 15:45:13,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:45:13,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600827470] [2024-06-20 15:45:13,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:45:13,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:45:13,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:45:15,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:45:15,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:45:15,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600827470] [2024-06-20 15:45:15,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600827470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:45:15,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:45:15,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:45:15,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499192292] [2024-06-20 15:45:15,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:45:15,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:45:15,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:45:15,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:45:15,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:45:15,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:45:15,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 851 transitions, 15400 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:45:15,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:45:15,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:45:15,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:45:18,487 INFO L124 PetriNetUnfolderBase]: 6767/10456 cut-off events. [2024-06-20 15:45:18,487 INFO L125 PetriNetUnfolderBase]: For 1299293/1299371 co-relation queries the response was YES. [2024-06-20 15:45:18,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107457 conditions, 10456 events. 6767/10456 cut-off events. For 1299293/1299371 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 66880 event pairs, 1703 based on Foata normal form. 14/10392 useless extension candidates. Maximal degree in co-relation 107293. Up to 9071 conditions per place. [2024-06-20 15:45:18,665 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 692 selfloop transitions, 192 changer transitions 0/905 dead transitions. [2024-06-20 15:45:18,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 905 transitions, 17809 flow [2024-06-20 15:45:18,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:45:18,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:45:18,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 215 transitions. [2024-06-20 15:45:18,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-20 15:45:18,666 INFO L175 Difference]: Start difference. First operand has 367 places, 851 transitions, 15400 flow. Second operand 11 states and 215 transitions. [2024-06-20 15:45:18,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 905 transitions, 17809 flow [2024-06-20 15:45:21,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 905 transitions, 17486 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-20 15:45:21,715 INFO L231 Difference]: Finished difference. Result has 372 places, 855 transitions, 15591 flow [2024-06-20 15:45:21,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15078, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=851, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=663, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15591, PETRI_PLACES=372, PETRI_TRANSITIONS=855} [2024-06-20 15:45:21,716 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 328 predicate places. [2024-06-20 15:45:21,716 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 855 transitions, 15591 flow [2024-06-20 15:45:21,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:45:21,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:45:21,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:45:21,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-20 15:45:21,717 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:45:21,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:45:21,717 INFO L85 PathProgramCache]: Analyzing trace with hash 2027713565, now seen corresponding path program 12 times [2024-06-20 15:45:21,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:45:21,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306199778] [2024-06-20 15:45:21,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:45:21,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:45:21,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:45:23,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:45:23,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:45:23,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306199778] [2024-06-20 15:45:23,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306199778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:45:23,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:45:23,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:45:23,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251366685] [2024-06-20 15:45:23,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:45:23,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:45:23,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:45:23,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:45:23,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:45:23,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:45:23,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 855 transitions, 15591 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:45:23,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:45:23,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:45:23,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:45:26,437 INFO L124 PetriNetUnfolderBase]: 6704/10386 cut-off events. [2024-06-20 15:45:26,438 INFO L125 PetriNetUnfolderBase]: For 1274232/1274294 co-relation queries the response was YES. [2024-06-20 15:45:26,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106630 conditions, 10386 events. 6704/10386 cut-off events. For 1274232/1274294 co-relation queries the response was YES. Maximal size of possible extension queue 653. Compared 66420 event pairs, 2039 based on Foata normal form. 16/10339 useless extension candidates. Maximal degree in co-relation 106464. Up to 9373 conditions per place. [2024-06-20 15:45:26,646 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 733 selfloop transitions, 147 changer transitions 0/901 dead transitions. [2024-06-20 15:45:26,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 901 transitions, 17627 flow [2024-06-20 15:45:26,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:45:26,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:45:26,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 211 transitions. [2024-06-20 15:45:26,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44608879492600423 [2024-06-20 15:45:26,647 INFO L175 Difference]: Start difference. First operand has 372 places, 855 transitions, 15591 flow. Second operand 11 states and 211 transitions. [2024-06-20 15:45:26,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 901 transitions, 17627 flow [2024-06-20 15:45:29,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 901 transitions, 17257 flow, removed 61 selfloop flow, removed 9 redundant places. [2024-06-20 15:45:29,888 INFO L231 Difference]: Finished difference. Result has 374 places, 855 transitions, 15557 flow [2024-06-20 15:45:29,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15221, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=855, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=708, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15557, PETRI_PLACES=374, PETRI_TRANSITIONS=855} [2024-06-20 15:45:29,889 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 330 predicate places. [2024-06-20 15:45:29,889 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 855 transitions, 15557 flow [2024-06-20 15:45:29,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:45:29,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:45:29,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:45:29,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-20 15:45:29,890 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:45:29,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:45:29,890 INFO L85 PathProgramCache]: Analyzing trace with hash 2032297535, now seen corresponding path program 13 times [2024-06-20 15:45:29,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:45:29,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813520246] [2024-06-20 15:45:29,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:45:29,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:45:29,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:45:31,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:45:31,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:45:31,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813520246] [2024-06-20 15:45:31,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813520246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:45:31,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:45:31,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:45:31,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408959076] [2024-06-20 15:45:31,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:45:31,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:45:31,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:45:31,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:45:31,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:45:31,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:45:31,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 855 transitions, 15557 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:45:31,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:45:31,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:45:31,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:45:34,456 INFO L124 PetriNetUnfolderBase]: 6705/10376 cut-off events. [2024-06-20 15:45:34,457 INFO L125 PetriNetUnfolderBase]: For 1146029/1146081 co-relation queries the response was YES. [2024-06-20 15:45:34,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104762 conditions, 10376 events. 6705/10376 cut-off events. For 1146029/1146081 co-relation queries the response was YES. Maximal size of possible extension queue 635. Compared 65955 event pairs, 1801 based on Foata normal form. 14/10338 useless extension candidates. Maximal degree in co-relation 104597. Up to 9369 conditions per place. [2024-06-20 15:45:34,648 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 705 selfloop transitions, 173 changer transitions 0/899 dead transitions. [2024-06-20 15:45:34,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 899 transitions, 17706 flow [2024-06-20 15:45:34,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:45:34,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:45:34,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-20 15:45:34,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44883720930232557 [2024-06-20 15:45:34,649 INFO L175 Difference]: Start difference. First operand has 374 places, 855 transitions, 15557 flow. Second operand 10 states and 193 transitions. [2024-06-20 15:45:34,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 899 transitions, 17706 flow [2024-06-20 15:45:37,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 899 transitions, 17375 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-20 15:45:37,489 INFO L231 Difference]: Finished difference. Result has 374 places, 857 transitions, 15668 flow [2024-06-20 15:45:37,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15226, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=855, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=682, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15668, PETRI_PLACES=374, PETRI_TRANSITIONS=857} [2024-06-20 15:45:37,489 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 330 predicate places. [2024-06-20 15:45:37,490 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 857 transitions, 15668 flow [2024-06-20 15:45:37,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:45:37,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:45:37,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:45:37,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-20 15:45:37,490 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)] === [2024-06-20 15:45:37,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:45:37,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1753138703, now seen corresponding path program 2 times [2024-06-20 15:45:37,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:45:37,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943973364] [2024-06-20 15:45:37,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:45:37,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:45:37,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:45:38,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:45:38,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:45:38,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943973364] [2024-06-20 15:45:38,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943973364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:45:38,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:45:38,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:45:38,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58803059] [2024-06-20 15:45:38,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:45:38,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:45:38,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:45:38,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:45:38,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:45:38,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:45:38,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 857 transitions, 15668 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) [2024-06-20 15:45:38,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:45:38,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:45:38,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:45:41,892 INFO L124 PetriNetUnfolderBase]: 7203/11122 cut-off events. [2024-06-20 15:45:41,892 INFO L125 PetriNetUnfolderBase]: For 1206743/1207144 co-relation queries the response was YES. [2024-06-20 15:45:42,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109830 conditions, 11122 events. 7203/11122 cut-off events. For 1206743/1207144 co-relation queries the response was YES. Maximal size of possible extension queue 670. Compared 70636 event pairs, 2478 based on Foata normal form. 234/11202 useless extension candidates. Maximal degree in co-relation 109666. Up to 9836 conditions per place. [2024-06-20 15:45:42,088 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 625 selfloop transitions, 111 changer transitions 0/895 dead transitions. [2024-06-20 15:45:42,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 895 transitions, 17846 flow [2024-06-20 15:45:42,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:45:42,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:45:42,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-20 15:45:42,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738372093023256 [2024-06-20 15:45:42,089 INFO L175 Difference]: Start difference. First operand has 374 places, 857 transitions, 15668 flow. Second operand 8 states and 163 transitions. [2024-06-20 15:45:42,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 895 transitions, 17846 flow [2024-06-20 15:45:44,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 895 transitions, 17437 flow, removed 30 selfloop flow, removed 9 redundant places. [2024-06-20 15:45:44,663 INFO L231 Difference]: Finished difference. Result has 375 places, 867 transitions, 15745 flow [2024-06-20 15:45:44,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15259, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=857, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=751, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15745, PETRI_PLACES=375, PETRI_TRANSITIONS=867} [2024-06-20 15:45:44,664 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 331 predicate places. [2024-06-20 15:45:44,664 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 867 transitions, 15745 flow [2024-06-20 15:45:44,664 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) [2024-06-20 15:45:44,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:45:44,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:45:44,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-20 15:45:44,665 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:45:44,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:45:44,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1533649730, now seen corresponding path program 4 times [2024-06-20 15:45:44,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:45:44,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693617402] [2024-06-20 15:45:44,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:45:44,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:45:44,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:45:46,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:45:46,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:45:46,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693617402] [2024-06-20 15:45:46,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693617402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:45:46,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:45:46,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:45:46,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582389109] [2024-06-20 15:45:46,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:45:46,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:45:46,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:45:46,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:45:46,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:45:46,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:45:46,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 867 transitions, 15745 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:45:46,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:45:46,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:45:46,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:45:50,483 INFO L124 PetriNetUnfolderBase]: 7296/11344 cut-off events. [2024-06-20 15:45:50,484 INFO L125 PetriNetUnfolderBase]: For 1277047/1277096 co-relation queries the response was YES. [2024-06-20 15:45:50,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116417 conditions, 11344 events. 7296/11344 cut-off events. For 1277047/1277096 co-relation queries the response was YES. Maximal size of possible extension queue 680. Compared 73822 event pairs, 2235 based on Foata normal form. 20/11311 useless extension candidates. Maximal degree in co-relation 116250. Up to 9662 conditions per place. [2024-06-20 15:45:50,685 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 827 selfloop transitions, 96 changer transitions 0/945 dead transitions. [2024-06-20 15:45:50,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 945 transitions, 18650 flow [2024-06-20 15:45:50,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:45:50,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:45:50,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 237 transitions. [2024-06-20 15:45:50,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-20 15:45:50,686 INFO L175 Difference]: Start difference. First operand has 375 places, 867 transitions, 15745 flow. Second operand 12 states and 237 transitions. [2024-06-20 15:45:50,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 945 transitions, 18650 flow [2024-06-20 15:45:54,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 945 transitions, 18539 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-20 15:45:54,251 INFO L231 Difference]: Finished difference. Result has 385 places, 885 transitions, 16366 flow [2024-06-20 15:45:54,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15638, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=867, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=772, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=16366, PETRI_PLACES=385, PETRI_TRANSITIONS=885} [2024-06-20 15:45:54,252 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 341 predicate places. [2024-06-20 15:45:54,252 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 885 transitions, 16366 flow [2024-06-20 15:45:54,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:45:54,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:45:54,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:45:54,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-20 15:45:54,253 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)] === [2024-06-20 15:45:54,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:45:54,253 INFO L85 PathProgramCache]: Analyzing trace with hash -140992645, now seen corresponding path program 4 times [2024-06-20 15:45:54,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:45:54,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304139274] [2024-06-20 15:45:54,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:45:54,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:45:54,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:45:55,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:45:55,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:45:55,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304139274] [2024-06-20 15:45:55,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304139274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:45:55,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:45:55,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:45:55,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902180953] [2024-06-20 15:45:55,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:45:55,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:45:55,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:45:55,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:45:55,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:45:55,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:45:55,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 885 transitions, 16366 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:45:55,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:45:55,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:45:55,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:45:59,226 INFO L124 PetriNetUnfolderBase]: 7789/12051 cut-off events. [2024-06-20 15:45:59,227 INFO L125 PetriNetUnfolderBase]: For 1387208/1387597 co-relation queries the response was YES. [2024-06-20 15:45:59,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123083 conditions, 12051 events. 7789/12051 cut-off events. For 1387208/1387597 co-relation queries the response was YES. Maximal size of possible extension queue 695. Compared 77686 event pairs, 2797 based on Foata normal form. 222/12115 useless extension candidates. Maximal degree in co-relation 122913. Up to 11045 conditions per place. [2024-06-20 15:45:59,420 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 690 selfloop transitions, 65 changer transitions 0/914 dead transitions. [2024-06-20 15:45:59,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 914 transitions, 18251 flow [2024-06-20 15:45:59,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:45:59,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:45:59,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-20 15:45:59,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45514950166112955 [2024-06-20 15:45:59,421 INFO L175 Difference]: Start difference. First operand has 385 places, 885 transitions, 16366 flow. Second operand 7 states and 137 transitions. [2024-06-20 15:45:59,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 914 transitions, 18251 flow [2024-06-20 15:46:02,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 914 transitions, 18129 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-20 15:46:03,008 INFO L231 Difference]: Finished difference. Result has 385 places, 893 transitions, 16579 flow [2024-06-20 15:46:03,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16244, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=885, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=821, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=16579, PETRI_PLACES=385, PETRI_TRANSITIONS=893} [2024-06-20 15:46:03,010 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 341 predicate places. [2024-06-20 15:46:03,010 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 893 transitions, 16579 flow [2024-06-20 15:46:03,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:03,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:03,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:03,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-20 15:46:03,010 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:46:03,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:03,011 INFO L85 PathProgramCache]: Analyzing trace with hash 906784714, now seen corresponding path program 5 times [2024-06-20 15:46:03,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:03,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351521013] [2024-06-20 15:46:03,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:03,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:03,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:05,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:46:05,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:05,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351521013] [2024-06-20 15:46:05,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351521013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:05,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:05,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:46:05,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575125182] [2024-06-20 15:46:05,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:05,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:46:05,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:05,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:46:05,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:46:05,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:46:05,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 893 transitions, 16579 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:05,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:05,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:46:05,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:09,782 INFO L124 PetriNetUnfolderBase]: 7490/11662 cut-off events. [2024-06-20 15:46:09,782 INFO L125 PetriNetUnfolderBase]: For 1368155/1368207 co-relation queries the response was YES. [2024-06-20 15:46:09,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119841 conditions, 11662 events. 7490/11662 cut-off events. For 1368155/1368207 co-relation queries the response was YES. Maximal size of possible extension queue 703. Compared 76553 event pairs, 2314 based on Foata normal form. 40/11642 useless extension candidates. Maximal degree in co-relation 119668. Up to 9965 conditions per place. [2024-06-20 15:46:09,965 INFO L140 encePairwiseOnDemand]: 27/43 looper letters, 717 selfloop transitions, 223 changer transitions 0/965 dead transitions. [2024-06-20 15:46:09,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 965 transitions, 19166 flow [2024-06-20 15:46:09,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:46:09,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:46:09,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 241 transitions. [2024-06-20 15:46:09,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46705426356589147 [2024-06-20 15:46:09,967 INFO L175 Difference]: Start difference. First operand has 385 places, 893 transitions, 16579 flow. Second operand 12 states and 241 transitions. [2024-06-20 15:46:09,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 965 transitions, 19166 flow [2024-06-20 15:46:13,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 965 transitions, 19097 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-20 15:46:13,500 INFO L231 Difference]: Finished difference. Result has 395 places, 904 transitions, 17188 flow [2024-06-20 15:46:13,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16512, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=893, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=670, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=17188, PETRI_PLACES=395, PETRI_TRANSITIONS=904} [2024-06-20 15:46:13,501 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 351 predicate places. [2024-06-20 15:46:13,501 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 904 transitions, 17188 flow [2024-06-20 15:46:13,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:13,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:13,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:13,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-20 15:46:13,502 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:46:13,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:13,502 INFO L85 PathProgramCache]: Analyzing trace with hash -2090350499, now seen corresponding path program 2 times [2024-06-20 15:46:13,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:13,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145520579] [2024-06-20 15:46:13,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:13,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:13,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:14,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:46:14,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:14,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145520579] [2024-06-20 15:46:14,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145520579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:14,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:14,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:46:14,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987120027] [2024-06-20 15:46:14,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:14,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:46:14,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:14,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:46:14,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:46:14,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 15:46:14,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 904 transitions, 17188 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:14,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:14,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 15:46:14,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:19,025 INFO L124 PetriNetUnfolderBase]: 8816/13400 cut-off events. [2024-06-20 15:46:19,025 INFO L125 PetriNetUnfolderBase]: For 1452739/1452787 co-relation queries the response was YES. [2024-06-20 15:46:19,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135920 conditions, 13400 events. 8816/13400 cut-off events. For 1452739/1452787 co-relation queries the response was YES. Maximal size of possible extension queue 706. Compared 84400 event pairs, 3070 based on Foata normal form. 8/13351 useless extension candidates. Maximal degree in co-relation 135744. Up to 12719 conditions per place. [2024-06-20 15:46:19,237 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 825 selfloop transitions, 100 changer transitions 0/947 dead transitions. [2024-06-20 15:46:19,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 947 transitions, 19485 flow [2024-06-20 15:46:19,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:46:19,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:46:19,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-20 15:46:19,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-20 15:46:19,239 INFO L175 Difference]: Start difference. First operand has 395 places, 904 transitions, 17188 flow. Second operand 9 states and 168 transitions. [2024-06-20 15:46:19,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 947 transitions, 19485 flow [2024-06-20 15:46:23,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 947 transitions, 18982 flow, removed 31 selfloop flow, removed 9 redundant places. [2024-06-20 15:46:23,247 INFO L231 Difference]: Finished difference. Result has 396 places, 911 transitions, 17107 flow [2024-06-20 15:46:23,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16701, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=904, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=808, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17107, PETRI_PLACES=396, PETRI_TRANSITIONS=911} [2024-06-20 15:46:23,248 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 352 predicate places. [2024-06-20 15:46:23,248 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 911 transitions, 17107 flow [2024-06-20 15:46:23,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:23,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:23,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:23,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-20 15:46:23,264 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:46:23,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:23,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1289289045, now seen corresponding path program 2 times [2024-06-20 15:46:23,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:23,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325187200] [2024-06-20 15:46:23,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:23,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:23,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:24,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:46:24,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:24,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325187200] [2024-06-20 15:46:24,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325187200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:24,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:24,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:46:24,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292647861] [2024-06-20 15:46:24,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:24,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:46:24,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:24,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:46:24,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:46:24,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:46:24,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 911 transitions, 17107 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:24,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:24,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:46:24,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:46:28,940 INFO L124 PetriNetUnfolderBase]: 7636/11883 cut-off events. [2024-06-20 15:46:28,941 INFO L125 PetriNetUnfolderBase]: For 1384670/1384734 co-relation queries the response was YES. [2024-06-20 15:46:29,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123007 conditions, 11883 events. 7636/11883 cut-off events. For 1384670/1384734 co-relation queries the response was YES. Maximal size of possible extension queue 710. Compared 78189 event pairs, 2436 based on Foata normal form. 15/11834 useless extension candidates. Maximal degree in co-relation 122829. Up to 10704 conditions per place. [2024-06-20 15:46:29,133 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 779 selfloop transitions, 155 changer transitions 0/960 dead transitions. [2024-06-20 15:46:29,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 960 transitions, 19471 flow [2024-06-20 15:46:29,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:46:29,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:46:29,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-20 15:46:29,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511627906976744 [2024-06-20 15:46:29,135 INFO L175 Difference]: Start difference. First operand has 396 places, 911 transitions, 17107 flow. Second operand 10 states and 194 transitions. [2024-06-20 15:46:29,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 960 transitions, 19471 flow [2024-06-20 15:46:32,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 960 transitions, 19211 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-20 15:46:32,203 INFO L231 Difference]: Finished difference. Result has 400 places, 917 transitions, 17348 flow [2024-06-20 15:46:32,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16847, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=911, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=756, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17348, PETRI_PLACES=400, PETRI_TRANSITIONS=917} [2024-06-20 15:46:32,213 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 356 predicate places. [2024-06-20 15:46:32,213 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 917 transitions, 17348 flow [2024-06-20 15:46:32,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:32,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:46:32,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:46:32,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-20 15:46:32,213 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:46:32,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:46:32,214 INFO L85 PathProgramCache]: Analyzing trace with hash 472347401, now seen corresponding path program 14 times [2024-06-20 15:46:32,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:46:32,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229632630] [2024-06-20 15:46:32,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:46:32,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:46:32,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:46:33,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:46:33,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:46:33,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229632630] [2024-06-20 15:46:33,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229632630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:46:33,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:46:33,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:46:33,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685851219] [2024-06-20 15:46:33,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:46:33,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:46:33,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:46:33,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:46:33,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:46:34,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 15:46:34,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 917 transitions, 17348 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:46:34,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:46:34,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 15:46:34,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand