./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe020_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe020_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f 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/safe020_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe020_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-04 16:13:11,147 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 16:13:11,227 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 16:13:11,230 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 16:13:11,230 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 16:13:11,254 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 16:13:11,254 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 16:13:11,255 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 16:13:11,255 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 16:13:11,258 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 16:13:11,258 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 16:13:11,258 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 16:13:11,259 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 16:13:11,260 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 16:13:11,260 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 16:13:11,260 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 16:13:11,260 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 16:13:11,260 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 16:13:11,260 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 16:13:11,260 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 16:13:11,261 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 16:13:11,262 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 16:13:11,262 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 16:13:11,262 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 16:13:11,262 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 16:13:11,262 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 16:13:11,262 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 16:13:11,262 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 16:13:11,263 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 16:13:11,263 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 16:13:11,264 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 16:13:11,264 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 16:13:11,264 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 16:13:11,264 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 16:13:11,264 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 16:13:11,264 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 16:13:11,264 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 16:13:11,264 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 16:13:11,264 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 16:13:11,265 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 16:13:11,265 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 16:13:11,265 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 16:13:11,265 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 16:13:11,265 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 16:13:11,469 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 16:13:11,487 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 16:13:11,489 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 16:13:11,489 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 16:13:11,490 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 16:13:11,491 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/safe020_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-04 16:13:11,613 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 16:13:11,614 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 16:13:11,614 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe020_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-04 16:13:12,520 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 16:13:12,760 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 16:13:12,761 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe020_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-04 16:13:12,775 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/864098081/018877b68df045e393f868a629dcee4d/FLAG81cc012d4 [2024-06-04 16:13:12,788 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/864098081/018877b68df045e393f868a629dcee4d [2024-06-04 16:13:12,788 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 16:13:12,789 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 16:13:12,791 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 16:13:12,792 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 16:13:12,795 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 16:13:12,796 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 04:13:11" (1/2) ... [2024-06-04 16:13:12,797 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b62322b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:13:12, skipping insertion in model container [2024-06-04 16:13:12,797 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 04:13:11" (1/2) ... [2024-06-04 16:13:12,798 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4c85674a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:13:12, skipping insertion in model container [2024-06-04 16:13:12,799 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 04:13:12" (2/2) ... [2024-06-04 16:13:12,799 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b62322b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:13:12, skipping insertion in model container [2024-06-04 16:13:12,799 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 04:13:12" (2/2) ... [2024-06-04 16:13:12,799 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 16:13:12,835 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 16:13:12,837 INFO L97 edCorrectnessWitness]: Location invariant before [L778-L778] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p0_EAX) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p2_EAX) - (long long )y >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )y >= 0LL) && (2LL + (long long )x) - (long long )y >= 0LL))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || (((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EAX <= 1) && __unbuffered_p2_EAX <= 1) && x <= 1) && y <= 2) && y <= 127) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-06-04 16:13:12,837 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p0_EAX) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p2_EAX) - (long long )y >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )y >= 0LL) && (2LL + (long long )x) - (long long )y >= 0LL))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || (((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EAX <= 1) && __unbuffered_p2_EAX <= 1) && x <= 1) && y <= 2) && y <= 127) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-06-04 16:13:12,837 INFO L97 edCorrectnessWitness]: Location invariant before [L780-L780] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p0_EAX) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p2_EAX) - (long long )y >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )y >= 0LL) && (2LL + (long long )x) - (long long )y >= 0LL))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || (((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EAX <= 1) && __unbuffered_p2_EAX <= 1) && x <= 1) && y <= 2) && y <= 127) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-06-04 16:13:12,837 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 16:13:12,837 INFO L106 edCorrectnessWitness]: ghost_update [L776-L776] multithreaded = 1; [2024-06-04 16:13:12,871 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 16:13:13,157 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 16:13:13,164 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 16:13:13,243 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 16:13:13,268 INFO L206 MainTranslator]: Completed translation [2024-06-04 16:13:13,269 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:13:13 WrapperNode [2024-06-04 16:13:13,269 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 16:13:13,270 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 16:13:13,270 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 16:13:13,270 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 16:13:13,275 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:13:13" (1/1) ... [2024-06-04 16:13:13,288 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:13:13" (1/1) ... [2024-06-04 16:13:13,318 INFO L138 Inliner]: procedures = 175, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 65 [2024-06-04 16:13:13,319 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 16:13:13,319 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 16:13:13,320 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 16:13:13,320 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 16:13:13,330 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:13:13" (1/1) ... [2024-06-04 16:13:13,331 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:13:13" (1/1) ... [2024-06-04 16:13:13,333 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:13:13" (1/1) ... [2024-06-04 16:13:13,343 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]. [2024-06-04 16:13:13,343 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:13:13" (1/1) ... [2024-06-04 16:13:13,343 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:13:13" (1/1) ... [2024-06-04 16:13:13,353 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:13:13" (1/1) ... [2024-06-04 16:13:13,354 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:13:13" (1/1) ... [2024-06-04 16:13:13,356 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:13:13" (1/1) ... [2024-06-04 16:13:13,356 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:13:13" (1/1) ... [2024-06-04 16:13:13,359 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 16:13:13,359 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 16:13:13,359 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 16:13:13,359 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 16:13:13,360 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:13:13" (1/1) ... [2024-06-04 16:13:13,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 16:13:13,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 16:13:13,389 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) [2024-06-04 16:13:13,412 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 [2024-06-04 16:13:13,420 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-04 16:13:13,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 16:13:13,420 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-04 16:13:13,420 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-04 16:13:13,421 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-04 16:13:13,421 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-04 16:13:13,421 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-04 16:13:13,421 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-04 16:13:13,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 16:13:13,422 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-04 16:13:13,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 16:13:13,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 16:13:13,423 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-04 16:13:13,527 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 16:13:13,529 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 16:13:13,768 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 16:13:13,769 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 16:13:13,853 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 16:13:13,854 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-04 16:13:13,854 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 04:13:13 BoogieIcfgContainer [2024-06-04 16:13:13,854 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 16:13:13,856 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 16:13:13,857 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 16:13:13,859 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 16:13:13,859 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 04:13:11" (1/4) ... [2024-06-04 16:13:13,860 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dac66a3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 04:13:13, skipping insertion in model container [2024-06-04 16:13:13,860 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 04:13:12" (2/4) ... [2024-06-04 16:13:13,860 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dac66a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 04:13:13, skipping insertion in model container [2024-06-04 16:13:13,860 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:13:13" (3/4) ... [2024-06-04 16:13:13,861 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dac66a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 04:13:13, skipping insertion in model container [2024-06-04 16:13:13,861 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 04:13:13" (4/4) ... [2024-06-04 16:13:13,861 INFO L112 eAbstractionObserver]: Analyzing ICFG safe020_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-04 16:13:13,873 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 16:13:13,874 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-04 16:13:13,874 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 16:13:13,911 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-04 16:13:13,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-04 16:13:13,968 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-04 16:13:13,969 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 16:13:13,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 66 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-04 16:13:13,970 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-04 16:13:13,973 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-04 16:13:13,983 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 16:13:13,989 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;@4dd3ebf7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 16:13:13,989 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-04 16:13:14,018 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 16:13:14,018 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-04 16:13:14,019 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 16:13:14,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:14,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 16:13:14,020 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)] === [2024-06-04 16:13:14,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:14,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1844257348, now seen corresponding path program 1 times [2024-06-04 16:13:14,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:14,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779776306] [2024-06-04 16:13:14,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:14,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:14,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:14,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:14,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:14,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779776306] [2024-06-04 16:13:14,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779776306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:14,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:14,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 16:13:14,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707985997] [2024-06-04 16:13:14,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:14,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 16:13:14,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:14,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 16:13:14,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 16:13:14,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-04 16:13:14,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:14,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:14,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-04 16:13:14,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:14,770 INFO L124 PetriNetUnfolderBase]: 471/817 cut-off events. [2024-06-04 16:13:14,770 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-06-04 16:13:14,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1607 conditions, 817 events. 471/817 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4087 event pairs, 288 based on Foata normal form. 1/772 useless extension candidates. Maximal degree in co-relation 1592. Up to 733 conditions per place. [2024-06-04 16:13:14,782 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 29 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-04 16:13:14,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 165 flow [2024-06-04 16:13:14,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 16:13:14,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 16:13:14,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2024-06-04 16:13:14,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6829268292682927 [2024-06-04 16:13:14,792 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 84 transitions. [2024-06-04 16:13:14,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 165 flow [2024-06-04 16:13:14,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 160 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-04 16:13:14,797 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-04 16:13:14,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-04 16:13:14,801 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-04 16:13:14,801 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-04 16:13:14,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:14,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:14,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:14,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 16:13:14,802 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)] === [2024-06-04 16:13:14,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:14,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1490211355, now seen corresponding path program 1 times [2024-06-04 16:13:14,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:14,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820870879] [2024-06-04 16:13:14,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:14,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:14,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:14,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:14,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:14,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820870879] [2024-06-04 16:13:14,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820870879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:14,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:14,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 16:13:14,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809576737] [2024-06-04 16:13:14,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:14,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 16:13:14,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:14,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 16:13:14,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-04 16:13:15,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-04 16:13:15,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:15,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:15,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-04 16:13:15,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:15,151 INFO L124 PetriNetUnfolderBase]: 472/821 cut-off events. [2024-06-04 16:13:15,151 INFO L125 PetriNetUnfolderBase]: For 164/172 co-relation queries the response was YES. [2024-06-04 16:13:15,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1879 conditions, 821 events. 472/821 cut-off events. For 164/172 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4009 event pairs, 232 based on Foata normal form. 7/809 useless extension candidates. Maximal degree in co-relation 1864. Up to 707 conditions per place. [2024-06-04 16:13:15,157 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 38 selfloop transitions, 11 changer transitions 0/58 dead transitions. [2024-06-04 16:13:15,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 58 transitions, 262 flow [2024-06-04 16:13:15,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:13:15,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:13:15,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 114 transitions. [2024-06-04 16:13:15,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6951219512195121 [2024-06-04 16:13:15,161 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 114 transitions. [2024-06-04 16:13:15,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 58 transitions, 262 flow [2024-06-04 16:13:15,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 58 transitions, 258 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 16:13:15,164 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 172 flow [2024-06-04 16:13:15,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=172, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2024-06-04 16:13:15,165 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2024-06-04 16:13:15,165 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 172 flow [2024-06-04 16:13:15,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:15,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:15,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:15,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 16:13:15,169 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:15,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:15,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1463752783, now seen corresponding path program 1 times [2024-06-04 16:13:15,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:15,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679230847] [2024-06-04 16:13:15,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:15,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:15,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:15,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:15,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:15,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679230847] [2024-06-04 16:13:15,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679230847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:15,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:15,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 16:13:15,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868434007] [2024-06-04 16:13:15,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:15,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 16:13:15,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:15,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 16:13:15,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-04 16:13:15,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:15,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 172 flow. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:15,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:15,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:15,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:15,618 INFO L124 PetriNetUnfolderBase]: 728/1203 cut-off events. [2024-06-04 16:13:15,619 INFO L125 PetriNetUnfolderBase]: For 812/812 co-relation queries the response was YES. [2024-06-04 16:13:15,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3281 conditions, 1203 events. 728/1203 cut-off events. For 812/812 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5842 event pairs, 392 based on Foata normal form. 2/1203 useless extension candidates. Maximal degree in co-relation 3263. Up to 1104 conditions per place. [2024-06-04 16:13:15,626 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 46 selfloop transitions, 7 changer transitions 0/60 dead transitions. [2024-06-04 16:13:15,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 60 transitions, 333 flow [2024-06-04 16:13:15,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:13:15,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:13:15,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-06-04 16:13:15,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-04 16:13:15,630 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 172 flow. Second operand 4 states and 100 transitions. [2024-06-04 16:13:15,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 60 transitions, 333 flow [2024-06-04 16:13:15,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 60 transitions, 329 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-04 16:13:15,633 INFO L231 Difference]: Finished difference. Result has 51 places, 49 transitions, 231 flow [2024-06-04 16:13:15,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=231, PETRI_PLACES=51, PETRI_TRANSITIONS=49} [2024-06-04 16:13:15,634 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2024-06-04 16:13:15,634 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 49 transitions, 231 flow [2024-06-04 16:13:15,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:15,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:15,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:15,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 16:13:15,636 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:15,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:15,636 INFO L85 PathProgramCache]: Analyzing trace with hash 845479641, now seen corresponding path program 1 times [2024-06-04 16:13:15,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:15,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280065799] [2024-06-04 16:13:15,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:15,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:15,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:15,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:15,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:15,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280065799] [2024-06-04 16:13:15,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280065799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:15,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:15,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:13:15,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598644734] [2024-06-04 16:13:15,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:15,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:13:15,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:15,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:13:15,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:13:15,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-04 16:13:15,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 49 transitions, 231 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:15,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:15,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-04 16:13:15,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:16,058 INFO L124 PetriNetUnfolderBase]: 722/1213 cut-off events. [2024-06-04 16:13:16,059 INFO L125 PetriNetUnfolderBase]: For 1438/1450 co-relation queries the response was YES. [2024-06-04 16:13:16,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3638 conditions, 1213 events. 722/1213 cut-off events. For 1438/1450 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 6048 event pairs, 189 based on Foata normal form. 20/1220 useless extension candidates. Maximal degree in co-relation 3616. Up to 978 conditions per place. [2024-06-04 16:13:16,066 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 56 selfloop transitions, 19 changer transitions 0/85 dead transitions. [2024-06-04 16:13:16,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 85 transitions, 491 flow [2024-06-04 16:13:16,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:13:16,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:13:16,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-06-04 16:13:16,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6585365853658537 [2024-06-04 16:13:16,067 INFO L175 Difference]: Start difference. First operand has 51 places, 49 transitions, 231 flow. Second operand 6 states and 162 transitions. [2024-06-04 16:13:16,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 85 transitions, 491 flow [2024-06-04 16:13:16,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 85 transitions, 487 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-04 16:13:16,070 INFO L231 Difference]: Finished difference. Result has 57 places, 54 transitions, 310 flow [2024-06-04 16:13:16,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=310, PETRI_PLACES=57, PETRI_TRANSITIONS=54} [2024-06-04 16:13:16,071 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 15 predicate places. [2024-06-04 16:13:16,071 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 54 transitions, 310 flow [2024-06-04 16:13:16,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:16,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:16,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:16,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 16:13:16,072 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:16,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:16,073 INFO L85 PathProgramCache]: Analyzing trace with hash -644341626, now seen corresponding path program 1 times [2024-06-04 16:13:16,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:16,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367293829] [2024-06-04 16:13:16,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:16,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:16,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:16,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:16,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:16,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367293829] [2024-06-04 16:13:16,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367293829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:16,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:16,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:13:16,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625717303] [2024-06-04 16:13:16,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:16,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:13:16,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:16,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:13:16,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:13:16,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:16,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 54 transitions, 310 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:16,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:16,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:16,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:16,441 INFO L124 PetriNetUnfolderBase]: 763/1271 cut-off events. [2024-06-04 16:13:16,442 INFO L125 PetriNetUnfolderBase]: For 2183/2183 co-relation queries the response was YES. [2024-06-04 16:13:16,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4235 conditions, 1271 events. 763/1271 cut-off events. For 2183/2183 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6255 event pairs, 266 based on Foata normal form. 2/1270 useless extension candidates. Maximal degree in co-relation 4209. Up to 1125 conditions per place. [2024-06-04 16:13:16,449 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 61 selfloop transitions, 14 changer transitions 0/82 dead transitions. [2024-06-04 16:13:16,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 82 transitions, 563 flow [2024-06-04 16:13:16,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:13:16,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:13:16,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-04 16:13:16,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195121951219512 [2024-06-04 16:13:16,450 INFO L175 Difference]: Start difference. First operand has 57 places, 54 transitions, 310 flow. Second operand 5 states and 127 transitions. [2024-06-04 16:13:16,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 82 transitions, 563 flow [2024-06-04 16:13:16,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 82 transitions, 523 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-04 16:13:16,458 INFO L231 Difference]: Finished difference. Result has 60 places, 62 transitions, 360 flow [2024-06-04 16:13:16,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=360, PETRI_PLACES=60, PETRI_TRANSITIONS=62} [2024-06-04 16:13:16,460 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 18 predicate places. [2024-06-04 16:13:16,460 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 62 transitions, 360 flow [2024-06-04 16:13:16,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:16,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:16,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:16,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 16:13:16,461 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)] === [2024-06-04 16:13:16,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:16,462 INFO L85 PathProgramCache]: Analyzing trace with hash -609076026, now seen corresponding path program 2 times [2024-06-04 16:13:16,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:16,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536372826] [2024-06-04 16:13:16,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:16,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:16,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:16,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:16,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:16,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536372826] [2024-06-04 16:13:16,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536372826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:16,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:16,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:13:16,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603103775] [2024-06-04 16:13:16,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:16,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:13:16,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:16,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:13:16,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:13:16,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:16,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 62 transitions, 360 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:16,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:16,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:16,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:16,828 INFO L124 PetriNetUnfolderBase]: 758/1262 cut-off events. [2024-06-04 16:13:16,828 INFO L125 PetriNetUnfolderBase]: For 2825/2825 co-relation queries the response was YES. [2024-06-04 16:13:16,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4448 conditions, 1262 events. 758/1262 cut-off events. For 2825/2825 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6223 event pairs, 269 based on Foata normal form. 2/1260 useless extension candidates. Maximal degree in co-relation 4420. Up to 1120 conditions per place. [2024-06-04 16:13:16,836 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 56 selfloop transitions, 15 changer transitions 0/78 dead transitions. [2024-06-04 16:13:16,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 78 transitions, 547 flow [2024-06-04 16:13:16,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:13:16,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:13:16,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-04 16:13:16,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5951219512195122 [2024-06-04 16:13:16,837 INFO L175 Difference]: Start difference. First operand has 60 places, 62 transitions, 360 flow. Second operand 5 states and 122 transitions. [2024-06-04 16:13:16,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 78 transitions, 547 flow [2024-06-04 16:13:16,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 78 transitions, 521 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-04 16:13:16,841 INFO L231 Difference]: Finished difference. Result has 63 places, 63 transitions, 379 flow [2024-06-04 16:13:16,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=379, PETRI_PLACES=63, PETRI_TRANSITIONS=63} [2024-06-04 16:13:16,842 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 21 predicate places. [2024-06-04 16:13:16,842 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 63 transitions, 379 flow [2024-06-04 16:13:16,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:16,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:16,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:16,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-04 16:13:16,843 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)] === [2024-06-04 16:13:16,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:16,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1159353754, now seen corresponding path program 1 times [2024-06-04 16:13:16,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:16,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849137682] [2024-06-04 16:13:16,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:16,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:16,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:17,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:17,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:17,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849137682] [2024-06-04 16:13:17,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849137682] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:17,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:17,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:13:17,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707770907] [2024-06-04 16:13:17,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:17,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:13:17,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:17,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:13:17,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:13:17,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:17,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 63 transitions, 379 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:17,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:17,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:17,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:17,200 INFO L124 PetriNetUnfolderBase]: 750/1255 cut-off events. [2024-06-04 16:13:17,200 INFO L125 PetriNetUnfolderBase]: For 3254/3254 co-relation queries the response was YES. [2024-06-04 16:13:17,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4475 conditions, 1255 events. 750/1255 cut-off events. For 3254/3254 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6154 event pairs, 246 based on Foata normal form. 4/1257 useless extension candidates. Maximal degree in co-relation 4446. Up to 1123 conditions per place. [2024-06-04 16:13:17,208 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 65 selfloop transitions, 9 changer transitions 0/81 dead transitions. [2024-06-04 16:13:17,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 81 transitions, 579 flow [2024-06-04 16:13:17,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:13:17,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:13:17,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-04 16:13:17,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-04 16:13:17,209 INFO L175 Difference]: Start difference. First operand has 63 places, 63 transitions, 379 flow. Second operand 5 states and 120 transitions. [2024-06-04 16:13:17,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 81 transitions, 579 flow [2024-06-04 16:13:17,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 81 transitions, 557 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-04 16:13:17,214 INFO L231 Difference]: Finished difference. Result has 66 places, 65 transitions, 398 flow [2024-06-04 16:13:17,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=398, PETRI_PLACES=66, PETRI_TRANSITIONS=65} [2024-06-04 16:13:17,214 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 24 predicate places. [2024-06-04 16:13:17,215 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 65 transitions, 398 flow [2024-06-04 16:13:17,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:17,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:17,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:17,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-04 16:13:17,215 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)] === [2024-06-04 16:13:17,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:17,216 INFO L85 PathProgramCache]: Analyzing trace with hash -382160743, now seen corresponding path program 1 times [2024-06-04 16:13:17,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:17,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886918778] [2024-06-04 16:13:17,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:17,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:17,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:17,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:17,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:17,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886918778] [2024-06-04 16:13:17,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886918778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:17,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:17,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:13:17,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788902757] [2024-06-04 16:13:17,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:17,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:13:17,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:17,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:13:17,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:13:17,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:17,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 65 transitions, 398 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:17,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:17,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:17,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:17,615 INFO L124 PetriNetUnfolderBase]: 773/1298 cut-off events. [2024-06-04 16:13:17,615 INFO L125 PetriNetUnfolderBase]: For 4190/4190 co-relation queries the response was YES. [2024-06-04 16:13:17,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4773 conditions, 1298 events. 773/1298 cut-off events. For 4190/4190 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6488 event pairs, 216 based on Foata normal form. 4/1298 useless extension candidates. Maximal degree in co-relation 4742. Up to 1101 conditions per place. [2024-06-04 16:13:17,624 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 67 selfloop transitions, 24 changer transitions 0/98 dead transitions. [2024-06-04 16:13:17,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 98 transitions, 700 flow [2024-06-04 16:13:17,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:13:17,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:13:17,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-04 16:13:17,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6422764227642277 [2024-06-04 16:13:17,625 INFO L175 Difference]: Start difference. First operand has 66 places, 65 transitions, 398 flow. Second operand 6 states and 158 transitions. [2024-06-04 16:13:17,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 98 transitions, 700 flow [2024-06-04 16:13:17,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 98 transitions, 677 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-04 16:13:17,631 INFO L231 Difference]: Finished difference. Result has 69 places, 70 transitions, 471 flow [2024-06-04 16:13:17,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=471, PETRI_PLACES=69, PETRI_TRANSITIONS=70} [2024-06-04 16:13:17,631 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 27 predicate places. [2024-06-04 16:13:17,631 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 70 transitions, 471 flow [2024-06-04 16:13:17,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:17,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:17,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:17,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-04 16:13:17,632 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)] === [2024-06-04 16:13:17,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:17,632 INFO L85 PathProgramCache]: Analyzing trace with hash 503210189, now seen corresponding path program 2 times [2024-06-04 16:13:17,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:17,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775280765] [2024-06-04 16:13:17,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:17,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:17,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:17,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:17,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:17,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775280765] [2024-06-04 16:13:17,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775280765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:17,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:17,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:13:17,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960180310] [2024-06-04 16:13:17,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:17,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:13:17,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:17,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:13:17,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:13:17,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:17,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 70 transitions, 471 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:17,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:17,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:17,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:17,998 INFO L124 PetriNetUnfolderBase]: 784/1326 cut-off events. [2024-06-04 16:13:17,998 INFO L125 PetriNetUnfolderBase]: For 4939/4939 co-relation queries the response was YES. [2024-06-04 16:13:18,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5320 conditions, 1326 events. 784/1326 cut-off events. For 4939/4939 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6618 event pairs, 243 based on Foata normal form. 2/1325 useless extension candidates. Maximal degree in co-relation 5288. Up to 1113 conditions per place. [2024-06-04 16:13:18,007 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 73 selfloop transitions, 24 changer transitions 0/104 dead transitions. [2024-06-04 16:13:18,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 104 transitions, 834 flow [2024-06-04 16:13:18,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:13:18,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:13:18,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-04 16:13:18,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-04 16:13:18,008 INFO L175 Difference]: Start difference. First operand has 69 places, 70 transitions, 471 flow. Second operand 6 states and 150 transitions. [2024-06-04 16:13:18,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 104 transitions, 834 flow [2024-06-04 16:13:18,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 104 transitions, 763 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-04 16:13:18,014 INFO L231 Difference]: Finished difference. Result has 73 places, 80 transitions, 566 flow [2024-06-04 16:13:18,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=411, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=566, PETRI_PLACES=73, PETRI_TRANSITIONS=80} [2024-06-04 16:13:18,015 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 31 predicate places. [2024-06-04 16:13:18,015 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 80 transitions, 566 flow [2024-06-04 16:13:18,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:18,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:18,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:18,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-04 16:13:18,016 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)] === [2024-06-04 16:13:18,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:18,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1505995995, now seen corresponding path program 1 times [2024-06-04 16:13:18,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:18,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100580666] [2024-06-04 16:13:18,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:18,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:18,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:18,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:18,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:18,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100580666] [2024-06-04 16:13:18,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100580666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:18,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:18,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:13:18,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134936336] [2024-06-04 16:13:18,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:18,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:13:18,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:18,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:13:18,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:13:18,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:18,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 80 transitions, 566 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:18,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:18,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:18,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:18,378 INFO L124 PetriNetUnfolderBase]: 801/1351 cut-off events. [2024-06-04 16:13:18,379 INFO L125 PetriNetUnfolderBase]: For 6350/6350 co-relation queries the response was YES. [2024-06-04 16:13:18,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5731 conditions, 1351 events. 801/1351 cut-off events. For 6350/6350 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6771 event pairs, 239 based on Foata normal form. 4/1352 useless extension candidates. Maximal degree in co-relation 5696. Up to 1166 conditions per place. [2024-06-04 16:13:18,388 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 81 selfloop transitions, 17 changer transitions 0/105 dead transitions. [2024-06-04 16:13:18,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 105 transitions, 836 flow [2024-06-04 16:13:18,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:13:18,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:13:18,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-04 16:13:18,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-04 16:13:18,389 INFO L175 Difference]: Start difference. First operand has 73 places, 80 transitions, 566 flow. Second operand 6 states and 146 transitions. [2024-06-04 16:13:18,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 105 transitions, 836 flow [2024-06-04 16:13:18,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 105 transitions, 814 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-04 16:13:18,397 INFO L231 Difference]: Finished difference. Result has 78 places, 82 transitions, 605 flow [2024-06-04 16:13:18,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=544, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=605, PETRI_PLACES=78, PETRI_TRANSITIONS=82} [2024-06-04 16:13:18,398 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 36 predicate places. [2024-06-04 16:13:18,398 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 82 transitions, 605 flow [2024-06-04 16:13:18,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:18,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:18,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:18,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-04 16:13:18,399 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)] === [2024-06-04 16:13:18,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:18,399 INFO L85 PathProgramCache]: Analyzing trace with hash -987827013, now seen corresponding path program 3 times [2024-06-04 16:13:18,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:18,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377952822] [2024-06-04 16:13:18,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:18,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:18,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:18,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:18,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:18,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377952822] [2024-06-04 16:13:18,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377952822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:18,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:18,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:13:18,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349705385] [2024-06-04 16:13:18,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:18,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:13:18,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:18,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:13:18,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:13:18,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:18,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 82 transitions, 605 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:18,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:18,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:18,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:18,748 INFO L124 PetriNetUnfolderBase]: 796/1337 cut-off events. [2024-06-04 16:13:18,748 INFO L125 PetriNetUnfolderBase]: For 7305/7305 co-relation queries the response was YES. [2024-06-04 16:13:18,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5917 conditions, 1337 events. 796/1337 cut-off events. For 7305/7305 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6688 event pairs, 251 based on Foata normal form. 2/1333 useless extension candidates. Maximal degree in co-relation 5880. Up to 1135 conditions per place. [2024-06-04 16:13:18,757 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 70 selfloop transitions, 25 changer transitions 0/102 dead transitions. [2024-06-04 16:13:18,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 102 transitions, 854 flow [2024-06-04 16:13:18,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:13:18,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:13:18,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-04 16:13:18,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5894308943089431 [2024-06-04 16:13:18,759 INFO L175 Difference]: Start difference. First operand has 78 places, 82 transitions, 605 flow. Second operand 6 states and 145 transitions. [2024-06-04 16:13:18,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 102 transitions, 854 flow [2024-06-04 16:13:18,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 102 transitions, 797 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-04 16:13:18,772 INFO L231 Difference]: Finished difference. Result has 80 places, 83 transitions, 617 flow [2024-06-04 16:13:18,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=552, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=617, PETRI_PLACES=80, PETRI_TRANSITIONS=83} [2024-06-04 16:13:18,772 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 38 predicate places. [2024-06-04 16:13:18,773 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 83 transitions, 617 flow [2024-06-04 16:13:18,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:18,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:18,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:18,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-04 16:13:18,773 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)] === [2024-06-04 16:13:18,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:18,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1733897145, now seen corresponding path program 2 times [2024-06-04 16:13:18,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:18,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236397413] [2024-06-04 16:13:18,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:18,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:18,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:18,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:18,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:18,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236397413] [2024-06-04 16:13:18,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236397413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:18,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:18,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:13:18,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477531201] [2024-06-04 16:13:18,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:18,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:13:18,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:18,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:13:18,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:13:18,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:18,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 83 transitions, 617 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:18,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:18,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:18,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:19,129 INFO L124 PetriNetUnfolderBase]: 813/1374 cut-off events. [2024-06-04 16:13:19,129 INFO L125 PetriNetUnfolderBase]: For 8424/8424 co-relation queries the response was YES. [2024-06-04 16:13:19,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6110 conditions, 1374 events. 813/1374 cut-off events. For 8424/8424 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6932 event pairs, 249 based on Foata normal form. 4/1374 useless extension candidates. Maximal degree in co-relation 6072. Up to 1186 conditions per place. [2024-06-04 16:13:19,138 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 81 selfloop transitions, 17 changer transitions 0/105 dead transitions. [2024-06-04 16:13:19,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 105 transitions, 883 flow [2024-06-04 16:13:19,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:13:19,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:13:19,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-04 16:13:19,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813008130081301 [2024-06-04 16:13:19,139 INFO L175 Difference]: Start difference. First operand has 80 places, 83 transitions, 617 flow. Second operand 6 states and 143 transitions. [2024-06-04 16:13:19,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 105 transitions, 883 flow [2024-06-04 16:13:19,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 105 transitions, 839 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-04 16:13:19,148 INFO L231 Difference]: Finished difference. Result has 83 places, 85 transitions, 638 flow [2024-06-04 16:13:19,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=573, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=638, PETRI_PLACES=83, PETRI_TRANSITIONS=85} [2024-06-04 16:13:19,149 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 41 predicate places. [2024-06-04 16:13:19,149 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 85 transitions, 638 flow [2024-06-04 16:13:19,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:19,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:19,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:19,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-04 16:13:19,150 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)] === [2024-06-04 16:13:19,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:19,150 INFO L85 PathProgramCache]: Analyzing trace with hash -564234039, now seen corresponding path program 3 times [2024-06-04 16:13:19,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:19,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384327964] [2024-06-04 16:13:19,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:19,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:19,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:19,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:19,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:19,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384327964] [2024-06-04 16:13:19,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384327964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:19,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:19,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:13:19,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063372118] [2024-06-04 16:13:19,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:19,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:13:19,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:19,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:13:19,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:13:19,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:19,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 85 transitions, 638 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:19,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:19,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:19,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:19,528 INFO L124 PetriNetUnfolderBase]: 805/1367 cut-off events. [2024-06-04 16:13:19,528 INFO L125 PetriNetUnfolderBase]: For 9531/9531 co-relation queries the response was YES. [2024-06-04 16:13:19,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6188 conditions, 1367 events. 805/1367 cut-off events. For 9531/9531 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 6928 event pairs, 218 based on Foata normal form. 4/1367 useless extension candidates. Maximal degree in co-relation 6148. Up to 1115 conditions per place. [2024-06-04 16:13:19,537 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 79 selfloop transitions, 22 changer transitions 0/108 dead transitions. [2024-06-04 16:13:19,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 108 transitions, 916 flow [2024-06-04 16:13:19,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:13:19,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:13:19,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-04 16:13:19,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-04 16:13:19,538 INFO L175 Difference]: Start difference. First operand has 83 places, 85 transitions, 638 flow. Second operand 6 states and 144 transitions. [2024-06-04 16:13:19,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 108 transitions, 916 flow [2024-06-04 16:13:19,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 108 transitions, 869 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-04 16:13:19,548 INFO L231 Difference]: Finished difference. Result has 85 places, 87 transitions, 670 flow [2024-06-04 16:13:19,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=670, PETRI_PLACES=85, PETRI_TRANSITIONS=87} [2024-06-04 16:13:19,549 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 43 predicate places. [2024-06-04 16:13:19,549 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 87 transitions, 670 flow [2024-06-04 16:13:19,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:19,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:19,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:19,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-04 16:13:19,549 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:19,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:19,550 INFO L85 PathProgramCache]: Analyzing trace with hash 146180405, now seen corresponding path program 1 times [2024-06-04 16:13:19,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:19,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436743576] [2024-06-04 16:13:19,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:19,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:19,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:19,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:19,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:19,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436743576] [2024-06-04 16:13:19,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436743576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:19,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:19,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:13:19,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856416997] [2024-06-04 16:13:19,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:19,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:13:19,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:19,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:13:19,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:13:19,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-04 16:13:19,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 87 transitions, 670 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 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) [2024-06-04 16:13:19,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:19,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-04 16:13:19,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:19,915 INFO L124 PetriNetUnfolderBase]: 727/1258 cut-off events. [2024-06-04 16:13:19,916 INFO L125 PetriNetUnfolderBase]: For 9943/9948 co-relation queries the response was YES. [2024-06-04 16:13:19,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5787 conditions, 1258 events. 727/1258 cut-off events. For 9943/9948 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 6416 event pairs, 246 based on Foata normal form. 7/1258 useless extension candidates. Maximal degree in co-relation 5746. Up to 1045 conditions per place. [2024-06-04 16:13:19,923 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 62 selfloop transitions, 18 changer transitions 0/95 dead transitions. [2024-06-04 16:13:19,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 95 transitions, 850 flow [2024-06-04 16:13:19,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:13:19,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:13:19,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-04 16:13:19,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-04 16:13:19,925 INFO L175 Difference]: Start difference. First operand has 85 places, 87 transitions, 670 flow. Second operand 4 states and 102 transitions. [2024-06-04 16:13:19,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 95 transitions, 850 flow [2024-06-04 16:13:19,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 95 transitions, 789 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-04 16:13:19,935 INFO L231 Difference]: Finished difference. Result has 85 places, 87 transitions, 654 flow [2024-06-04 16:13:19,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=609, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=654, PETRI_PLACES=85, PETRI_TRANSITIONS=87} [2024-06-04 16:13:19,935 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 43 predicate places. [2024-06-04 16:13:19,935 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 87 transitions, 654 flow [2024-06-04 16:13:19,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 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) [2024-06-04 16:13:19,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:19,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:19,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-04 16:13:19,936 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)] === [2024-06-04 16:13:19,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:19,937 INFO L85 PathProgramCache]: Analyzing trace with hash -377666298, now seen corresponding path program 1 times [2024-06-04 16:13:19,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:19,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310807365] [2024-06-04 16:13:19,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:19,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:19,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:20,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:20,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:20,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310807365] [2024-06-04 16:13:20,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310807365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:20,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:20,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:13:20,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372769879] [2024-06-04 16:13:20,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:20,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:13:20,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:20,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:13:20,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:13:20,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:20,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 87 transitions, 654 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:20,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:20,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:20,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:20,315 INFO L124 PetriNetUnfolderBase]: 785/1326 cut-off events. [2024-06-04 16:13:20,315 INFO L125 PetriNetUnfolderBase]: For 10728/10728 co-relation queries the response was YES. [2024-06-04 16:13:20,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6191 conditions, 1326 events. 785/1326 cut-off events. For 10728/10728 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 6591 event pairs, 234 based on Foata normal form. 1/1325 useless extension candidates. Maximal degree in co-relation 6149. Up to 1183 conditions per place. [2024-06-04 16:13:20,323 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 85 selfloop transitions, 16 changer transitions 0/108 dead transitions. [2024-06-04 16:13:20,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 108 transitions, 980 flow [2024-06-04 16:13:20,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:13:20,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:13:20,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-06-04 16:13:20,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5331010452961672 [2024-06-04 16:13:20,324 INFO L175 Difference]: Start difference. First operand has 85 places, 87 transitions, 654 flow. Second operand 7 states and 153 transitions. [2024-06-04 16:13:20,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 108 transitions, 980 flow [2024-06-04 16:13:20,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 108 transitions, 936 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-04 16:13:20,336 INFO L231 Difference]: Finished difference. Result has 89 places, 93 transitions, 714 flow [2024-06-04 16:13:20,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=610, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=714, PETRI_PLACES=89, PETRI_TRANSITIONS=93} [2024-06-04 16:13:20,336 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2024-06-04 16:13:20,337 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 93 transitions, 714 flow [2024-06-04 16:13:20,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:20,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:20,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:20,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-04 16:13:20,337 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:20,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:20,338 INFO L85 PathProgramCache]: Analyzing trace with hash -372904698, now seen corresponding path program 2 times [2024-06-04 16:13:20,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:20,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042827100] [2024-06-04 16:13:20,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:20,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:20,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:20,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:20,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:20,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042827100] [2024-06-04 16:13:20,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042827100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:20,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:20,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:13:20,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517570870] [2024-06-04 16:13:20,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:20,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:13:20,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:20,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:13:20,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:13:20,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:20,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 93 transitions, 714 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:20,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:20,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:20,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:20,754 INFO L124 PetriNetUnfolderBase]: 782/1322 cut-off events. [2024-06-04 16:13:20,754 INFO L125 PetriNetUnfolderBase]: For 11980/11980 co-relation queries the response was YES. [2024-06-04 16:13:20,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6370 conditions, 1322 events. 782/1322 cut-off events. For 11980/11980 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 6551 event pairs, 235 based on Foata normal form. 1/1321 useless extension candidates. Maximal degree in co-relation 6328. Up to 1183 conditions per place. [2024-06-04 16:13:20,761 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 85 selfloop transitions, 12 changer transitions 0/104 dead transitions. [2024-06-04 16:13:20,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 104 transitions, 936 flow [2024-06-04 16:13:20,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:13:20,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:13:20,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-06-04 16:13:20,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-04 16:13:20,763 INFO L175 Difference]: Start difference. First operand has 89 places, 93 transitions, 714 flow. Second operand 4 states and 100 transitions. [2024-06-04 16:13:20,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 104 transitions, 936 flow [2024-06-04 16:13:20,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 104 transitions, 866 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-04 16:13:20,779 INFO L231 Difference]: Finished difference. Result has 89 places, 93 transitions, 678 flow [2024-06-04 16:13:20,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=644, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=678, PETRI_PLACES=89, PETRI_TRANSITIONS=93} [2024-06-04 16:13:20,779 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2024-06-04 16:13:20,780 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 93 transitions, 678 flow [2024-06-04 16:13:20,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:20,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:20,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:20,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-04 16:13:20,781 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)] === [2024-06-04 16:13:20,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:20,782 INFO L85 PathProgramCache]: Analyzing trace with hash 2107900536, now seen corresponding path program 1 times [2024-06-04 16:13:20,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:20,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530755898] [2024-06-04 16:13:20,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:20,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:20,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:20,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:20,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:20,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530755898] [2024-06-04 16:13:20,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530755898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:20,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:20,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:13:20,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227761069] [2024-06-04 16:13:20,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:20,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:13:20,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:20,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:13:20,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:13:21,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:21,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 93 transitions, 678 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:21,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:21,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:21,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:21,328 INFO L124 PetriNetUnfolderBase]: 1178/1988 cut-off events. [2024-06-04 16:13:21,328 INFO L125 PetriNetUnfolderBase]: For 26321/26321 co-relation queries the response was YES. [2024-06-04 16:13:21,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9604 conditions, 1988 events. 1178/1988 cut-off events. For 26321/26321 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10850 event pairs, 279 based on Foata normal form. 42/2026 useless extension candidates. Maximal degree in co-relation 9562. Up to 1089 conditions per place. [2024-06-04 16:13:21,341 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 103 selfloop transitions, 33 changer transitions 4/147 dead transitions. [2024-06-04 16:13:21,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 147 transitions, 1246 flow [2024-06-04 16:13:21,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:13:21,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:13:21,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-04 16:13:21,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6463414634146342 [2024-06-04 16:13:21,342 INFO L175 Difference]: Start difference. First operand has 89 places, 93 transitions, 678 flow. Second operand 8 states and 212 transitions. [2024-06-04 16:13:21,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 147 transitions, 1246 flow [2024-06-04 16:13:21,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 147 transitions, 1222 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-04 16:13:21,367 INFO L231 Difference]: Finished difference. Result has 95 places, 98 transitions, 805 flow [2024-06-04 16:13:21,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=654, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=805, PETRI_PLACES=95, PETRI_TRANSITIONS=98} [2024-06-04 16:13:21,368 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 53 predicate places. [2024-06-04 16:13:21,368 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 98 transitions, 805 flow [2024-06-04 16:13:21,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:21,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:21,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:21,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-04 16:13:21,369 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)] === [2024-06-04 16:13:21,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:21,369 INFO L85 PathProgramCache]: Analyzing trace with hash 160660036, now seen corresponding path program 2 times [2024-06-04 16:13:21,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:21,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973355878] [2024-06-04 16:13:21,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:21,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:21,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:21,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:21,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:21,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973355878] [2024-06-04 16:13:21,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973355878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:21,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:21,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:13:21,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805090673] [2024-06-04 16:13:21,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:21,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:13:21,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:21,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:13:21,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:13:21,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:21,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 98 transitions, 805 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:21,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:21,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:21,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:21,868 INFO L124 PetriNetUnfolderBase]: 1051/1783 cut-off events. [2024-06-04 16:13:21,868 INFO L125 PetriNetUnfolderBase]: For 24034/24034 co-relation queries the response was YES. [2024-06-04 16:13:21,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8535 conditions, 1783 events. 1051/1783 cut-off events. For 24034/24034 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 9532 event pairs, 332 based on Foata normal form. 50/1829 useless extension candidates. Maximal degree in co-relation 8491. Up to 1320 conditions per place. [2024-06-04 16:13:21,878 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 97 selfloop transitions, 28 changer transitions 3/135 dead transitions. [2024-06-04 16:13:21,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 135 transitions, 1198 flow [2024-06-04 16:13:21,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:13:21,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:13:21,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-04 16:13:21,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-04 16:13:21,879 INFO L175 Difference]: Start difference. First operand has 95 places, 98 transitions, 805 flow. Second operand 7 states and 182 transitions. [2024-06-04 16:13:21,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 135 transitions, 1198 flow [2024-06-04 16:13:21,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 135 transitions, 1128 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-04 16:13:21,905 INFO L231 Difference]: Finished difference. Result has 98 places, 98 transitions, 816 flow [2024-06-04 16:13:21,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=743, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=816, PETRI_PLACES=98, PETRI_TRANSITIONS=98} [2024-06-04 16:13:21,905 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 56 predicate places. [2024-06-04 16:13:21,906 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 98 transitions, 816 flow [2024-06-04 16:13:21,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:21,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:21,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:21,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-04 16:13:21,906 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)] === [2024-06-04 16:13:21,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:21,907 INFO L85 PathProgramCache]: Analyzing trace with hash 937757582, now seen corresponding path program 3 times [2024-06-04 16:13:21,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:21,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105724937] [2024-06-04 16:13:21,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:21,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:21,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:22,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:22,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:22,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105724937] [2024-06-04 16:13:22,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105724937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:22,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:22,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:13:22,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562665177] [2024-06-04 16:13:22,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:22,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:13:22,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:22,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:13:22,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:13:22,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:22,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 98 transitions, 816 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:22,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:22,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:22,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:22,392 INFO L124 PetriNetUnfolderBase]: 1099/1876 cut-off events. [2024-06-04 16:13:22,393 INFO L125 PetriNetUnfolderBase]: For 20818/20818 co-relation queries the response was YES. [2024-06-04 16:13:22,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8927 conditions, 1876 events. 1099/1876 cut-off events. For 20818/20818 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 10137 event pairs, 349 based on Foata normal form. 16/1889 useless extension candidates. Maximal degree in co-relation 8881. Up to 1561 conditions per place. [2024-06-04 16:13:22,403 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 96 selfloop transitions, 26 changer transitions 0/129 dead transitions. [2024-06-04 16:13:22,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 129 transitions, 1168 flow [2024-06-04 16:13:22,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:13:22,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:13:22,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-04 16:13:22,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-04 16:13:22,404 INFO L175 Difference]: Start difference. First operand has 98 places, 98 transitions, 816 flow. Second operand 7 states and 171 transitions. [2024-06-04 16:13:22,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 129 transitions, 1168 flow [2024-06-04 16:13:22,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 129 transitions, 1116 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-04 16:13:22,425 INFO L231 Difference]: Finished difference. Result has 100 places, 99 transitions, 843 flow [2024-06-04 16:13:22,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=764, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=843, PETRI_PLACES=100, PETRI_TRANSITIONS=99} [2024-06-04 16:13:22,426 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 58 predicate places. [2024-06-04 16:13:22,426 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 99 transitions, 843 flow [2024-06-04 16:13:22,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:22,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:22,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:22,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-04 16:13:22,426 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)] === [2024-06-04 16:13:22,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:22,426 INFO L85 PathProgramCache]: Analyzing trace with hash 448261540, now seen corresponding path program 1 times [2024-06-04 16:13:22,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:22,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792721053] [2024-06-04 16:13:22,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:22,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:22,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:22,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:22,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:22,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792721053] [2024-06-04 16:13:22,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792721053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:22,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:22,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:13:22,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838571981] [2024-06-04 16:13:22,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:22,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:13:22,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:22,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:13:22,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:13:22,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:22,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 99 transitions, 843 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:22,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:22,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:22,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:22,909 INFO L124 PetriNetUnfolderBase]: 1140/1957 cut-off events. [2024-06-04 16:13:22,909 INFO L125 PetriNetUnfolderBase]: For 22702/22702 co-relation queries the response was YES. [2024-06-04 16:13:22,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9339 conditions, 1957 events. 1140/1957 cut-off events. For 22702/22702 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 10804 event pairs, 345 based on Foata normal form. 12/1966 useless extension candidates. Maximal degree in co-relation 9292. Up to 1453 conditions per place. [2024-06-04 16:13:22,920 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 97 selfloop transitions, 29 changer transitions 0/133 dead transitions. [2024-06-04 16:13:22,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 133 transitions, 1217 flow [2024-06-04 16:13:22,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:13:22,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:13:22,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-04 16:13:22,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-04 16:13:22,921 INFO L175 Difference]: Start difference. First operand has 100 places, 99 transitions, 843 flow. Second operand 7 states and 173 transitions. [2024-06-04 16:13:22,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 133 transitions, 1217 flow [2024-06-04 16:13:22,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 133 transitions, 1158 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-04 16:13:22,944 INFO L231 Difference]: Finished difference. Result has 102 places, 100 transitions, 870 flow [2024-06-04 16:13:22,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=784, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=870, PETRI_PLACES=102, PETRI_TRANSITIONS=100} [2024-06-04 16:13:22,945 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 60 predicate places. [2024-06-04 16:13:22,945 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 100 transitions, 870 flow [2024-06-04 16:13:22,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:22,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:22,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:22,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-04 16:13:22,946 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)] === [2024-06-04 16:13:22,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:22,946 INFO L85 PathProgramCache]: Analyzing trace with hash 630759484, now seen corresponding path program 4 times [2024-06-04 16:13:22,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:22,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843344347] [2024-06-04 16:13:22,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:22,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:22,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:23,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:23,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:23,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843344347] [2024-06-04 16:13:23,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843344347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:23,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:23,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:13:23,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606865740] [2024-06-04 16:13:23,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:23,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:13:23,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:23,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:13:23,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:13:23,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:23,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 100 transitions, 870 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:23,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:23,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:23,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:23,416 INFO L124 PetriNetUnfolderBase]: 1173/2009 cut-off events. [2024-06-04 16:13:23,416 INFO L125 PetriNetUnfolderBase]: For 25126/25126 co-relation queries the response was YES. [2024-06-04 16:13:23,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9589 conditions, 2009 events. 1173/2009 cut-off events. For 25126/25126 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 11193 event pairs, 382 based on Foata normal form. 16/2019 useless extension candidates. Maximal degree in co-relation 9541. Up to 1691 conditions per place. [2024-06-04 16:13:23,429 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 95 selfloop transitions, 26 changer transitions 0/128 dead transitions. [2024-06-04 16:13:23,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 128 transitions, 1216 flow [2024-06-04 16:13:23,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:13:23,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:13:23,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-04 16:13:23,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-04 16:13:23,430 INFO L175 Difference]: Start difference. First operand has 102 places, 100 transitions, 870 flow. Second operand 7 states and 168 transitions. [2024-06-04 16:13:23,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 128 transitions, 1216 flow [2024-06-04 16:13:23,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 128 transitions, 1155 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-04 16:13:23,459 INFO L231 Difference]: Finished difference. Result has 105 places, 101 transitions, 892 flow [2024-06-04 16:13:23,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=809, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=892, PETRI_PLACES=105, PETRI_TRANSITIONS=101} [2024-06-04 16:13:23,459 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 63 predicate places. [2024-06-04 16:13:23,459 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 101 transitions, 892 flow [2024-06-04 16:13:23,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:23,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:23,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:23,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-04 16:13:23,460 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)] === [2024-06-04 16:13:23,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:23,460 INFO L85 PathProgramCache]: Analyzing trace with hash -178599174, now seen corresponding path program 2 times [2024-06-04 16:13:23,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:23,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319722699] [2024-06-04 16:13:23,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:23,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:23,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:23,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:23,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:23,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319722699] [2024-06-04 16:13:23,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319722699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:23,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:23,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:13:23,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66594576] [2024-06-04 16:13:23,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:23,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:13:23,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:23,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:13:23,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:13:23,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:23,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 101 transitions, 892 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:23,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:23,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:23,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:23,893 INFO L124 PetriNetUnfolderBase]: 1214/2085 cut-off events. [2024-06-04 16:13:23,894 INFO L125 PetriNetUnfolderBase]: For 26803/26803 co-relation queries the response was YES. [2024-06-04 16:13:23,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9939 conditions, 2085 events. 1214/2085 cut-off events. For 26803/26803 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 11709 event pairs, 382 based on Foata normal form. 12/2091 useless extension candidates. Maximal degree in co-relation 9890. Up to 1675 conditions per place. [2024-06-04 16:13:23,908 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 97 selfloop transitions, 28 changer transitions 0/132 dead transitions. [2024-06-04 16:13:23,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 132 transitions, 1260 flow [2024-06-04 16:13:23,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:13:23,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:13:23,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-04 16:13:23,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-04 16:13:23,911 INFO L175 Difference]: Start difference. First operand has 105 places, 101 transitions, 892 flow. Second operand 7 states and 171 transitions. [2024-06-04 16:13:23,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 132 transitions, 1260 flow [2024-06-04 16:13:23,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 132 transitions, 1197 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-04 16:13:23,943 INFO L231 Difference]: Finished difference. Result has 107 places, 102 transitions, 917 flow [2024-06-04 16:13:23,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=829, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=917, PETRI_PLACES=107, PETRI_TRANSITIONS=102} [2024-06-04 16:13:23,944 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 65 predicate places. [2024-06-04 16:13:23,944 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 102 transitions, 917 flow [2024-06-04 16:13:23,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:23,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:23,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:23,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-04 16:13:23,946 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)] === [2024-06-04 16:13:23,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:23,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1465901044, now seen corresponding path program 3 times [2024-06-04 16:13:23,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:23,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336964679] [2024-06-04 16:13:23,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:23,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:23,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:24,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:24,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:24,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336964679] [2024-06-04 16:13:24,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336964679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:24,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:24,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:13:24,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503951571] [2024-06-04 16:13:24,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:24,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:13:24,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:24,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:13:24,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:13:24,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:24,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 102 transitions, 917 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:24,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:24,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:24,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:24,373 INFO L124 PetriNetUnfolderBase]: 1194/2063 cut-off events. [2024-06-04 16:13:24,373 INFO L125 PetriNetUnfolderBase]: For 25605/25605 co-relation queries the response was YES. [2024-06-04 16:13:24,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9588 conditions, 2063 events. 1194/2063 cut-off events. For 25605/25605 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 11609 event pairs, 327 based on Foata normal form. 12/2069 useless extension candidates. Maximal degree in co-relation 9538. Up to 1262 conditions per place. [2024-06-04 16:13:24,387 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 90 selfloop transitions, 35 changer transitions 0/132 dead transitions. [2024-06-04 16:13:24,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 132 transitions, 1223 flow [2024-06-04 16:13:24,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:13:24,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:13:24,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-04 16:13:24,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-04 16:13:24,389 INFO L175 Difference]: Start difference. First operand has 107 places, 102 transitions, 917 flow. Second operand 7 states and 170 transitions. [2024-06-04 16:13:24,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 132 transitions, 1223 flow [2024-06-04 16:13:24,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 132 transitions, 1151 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-04 16:13:24,425 INFO L231 Difference]: Finished difference. Result has 108 places, 101 transitions, 879 flow [2024-06-04 16:13:24,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=879, PETRI_PLACES=108, PETRI_TRANSITIONS=101} [2024-06-04 16:13:24,426 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 66 predicate places. [2024-06-04 16:13:24,426 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 101 transitions, 879 flow [2024-06-04 16:13:24,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:24,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:24,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:24,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-04 16:13:24,427 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:24,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:24,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1177247466, now seen corresponding path program 1 times [2024-06-04 16:13:24,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:24,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430468647] [2024-06-04 16:13:24,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:24,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:24,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:24,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:24,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:24,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430468647] [2024-06-04 16:13:24,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430468647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:24,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:24,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:13:24,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277489029] [2024-06-04 16:13:24,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:24,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:13:24,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:24,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:13:24,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:13:24,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:24,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 101 transitions, 879 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:24,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:24,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:24,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:24,884 INFO L124 PetriNetUnfolderBase]: 1222/2106 cut-off events. [2024-06-04 16:13:24,885 INFO L125 PetriNetUnfolderBase]: For 25592/25592 co-relation queries the response was YES. [2024-06-04 16:13:24,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9919 conditions, 2106 events. 1222/2106 cut-off events. For 25592/25592 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11861 event pairs, 373 based on Foata normal form. 2/2104 useless extension candidates. Maximal degree in co-relation 9868. Up to 1837 conditions per place. [2024-06-04 16:13:24,898 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 92 selfloop transitions, 35 changer transitions 0/134 dead transitions. [2024-06-04 16:13:24,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 134 transitions, 1433 flow [2024-06-04 16:13:24,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:13:24,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:13:24,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-04 16:13:24,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-04 16:13:24,899 INFO L175 Difference]: Start difference. First operand has 108 places, 101 transitions, 879 flow. Second operand 8 states and 180 transitions. [2024-06-04 16:13:24,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 134 transitions, 1433 flow [2024-06-04 16:13:24,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 134 transitions, 1345 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-04 16:13:24,934 INFO L231 Difference]: Finished difference. Result has 113 places, 115 transitions, 1044 flow [2024-06-04 16:13:24,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=791, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1044, PETRI_PLACES=113, PETRI_TRANSITIONS=115} [2024-06-04 16:13:24,934 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 71 predicate places. [2024-06-04 16:13:24,934 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 115 transitions, 1044 flow [2024-06-04 16:13:24,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:24,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:24,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:24,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-04 16:13:24,935 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:24,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:24,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1254532364, now seen corresponding path program 2 times [2024-06-04 16:13:24,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:24,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550318782] [2024-06-04 16:13:24,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:24,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:24,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:25,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:25,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:25,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550318782] [2024-06-04 16:13:25,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550318782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:25,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:25,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:13:25,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182006390] [2024-06-04 16:13:25,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:25,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:13:25,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:25,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:13:25,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:13:25,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:25,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 115 transitions, 1044 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:25,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:25,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:25,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:25,442 INFO L124 PetriNetUnfolderBase]: 1253/2154 cut-off events. [2024-06-04 16:13:25,442 INFO L125 PetriNetUnfolderBase]: For 28411/28411 co-relation queries the response was YES. [2024-06-04 16:13:25,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10495 conditions, 2154 events. 1253/2154 cut-off events. For 28411/28411 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 12231 event pairs, 386 based on Foata normal form. 3/2151 useless extension candidates. Maximal degree in co-relation 10441. Up to 1846 conditions per place. [2024-06-04 16:13:25,456 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 86 selfloop transitions, 53 changer transitions 0/146 dead transitions. [2024-06-04 16:13:25,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 146 transitions, 1632 flow [2024-06-04 16:13:25,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:13:25,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:13:25,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-04 16:13:25,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818815331010453 [2024-06-04 16:13:25,457 INFO L175 Difference]: Start difference. First operand has 113 places, 115 transitions, 1044 flow. Second operand 7 states and 167 transitions. [2024-06-04 16:13:25,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 146 transitions, 1632 flow [2024-06-04 16:13:25,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 146 transitions, 1518 flow, removed 45 selfloop flow, removed 3 redundant places. [2024-06-04 16:13:25,493 INFO L231 Difference]: Finished difference. Result has 118 places, 130 transitions, 1261 flow [2024-06-04 16:13:25,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=950, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1261, PETRI_PLACES=118, PETRI_TRANSITIONS=130} [2024-06-04 16:13:25,493 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 76 predicate places. [2024-06-04 16:13:25,493 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 130 transitions, 1261 flow [2024-06-04 16:13:25,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:25,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:25,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:25,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-04 16:13:25,494 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:25,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:25,494 INFO L85 PathProgramCache]: Analyzing trace with hash -602316854, now seen corresponding path program 3 times [2024-06-04 16:13:25,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:25,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954273452] [2024-06-04 16:13:25,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:25,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:25,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:25,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:25,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:25,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954273452] [2024-06-04 16:13:25,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954273452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:25,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:25,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:13:25,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392361044] [2024-06-04 16:13:25,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:25,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:13:25,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:25,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:13:25,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:13:25,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:25,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 130 transitions, 1261 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:25,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:25,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:25,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:25,988 INFO L124 PetriNetUnfolderBase]: 1246/2146 cut-off events. [2024-06-04 16:13:25,988 INFO L125 PetriNetUnfolderBase]: For 30623/30623 co-relation queries the response was YES. [2024-06-04 16:13:25,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10868 conditions, 2146 events. 1246/2146 cut-off events. For 30623/30623 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 12224 event pairs, 389 based on Foata normal form. 3/2143 useless extension candidates. Maximal degree in co-relation 10812. Up to 1841 conditions per place. [2024-06-04 16:13:26,002 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 88 selfloop transitions, 48 changer transitions 0/143 dead transitions. [2024-06-04 16:13:26,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 143 transitions, 1615 flow [2024-06-04 16:13:26,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:13:26,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:13:26,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-04 16:13:26,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6146341463414634 [2024-06-04 16:13:26,004 INFO L175 Difference]: Start difference. First operand has 118 places, 130 transitions, 1261 flow. Second operand 5 states and 126 transitions. [2024-06-04 16:13:26,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 143 transitions, 1615 flow [2024-06-04 16:13:26,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 143 transitions, 1483 flow, removed 48 selfloop flow, removed 3 redundant places. [2024-06-04 16:13:26,052 INFO L231 Difference]: Finished difference. Result has 120 places, 130 transitions, 1237 flow [2024-06-04 16:13:26,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1129, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1237, PETRI_PLACES=120, PETRI_TRANSITIONS=130} [2024-06-04 16:13:26,052 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 78 predicate places. [2024-06-04 16:13:26,053 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 130 transitions, 1237 flow [2024-06-04 16:13:26,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:26,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:26,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:26,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-04 16:13:26,053 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:26,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:26,054 INFO L85 PathProgramCache]: Analyzing trace with hash -617294938, now seen corresponding path program 1 times [2024-06-04 16:13:26,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:26,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236086721] [2024-06-04 16:13:26,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:26,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:26,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:26,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:26,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:26,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236086721] [2024-06-04 16:13:26,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236086721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:26,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:26,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:13:26,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529141992] [2024-06-04 16:13:26,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:26,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:13:26,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:26,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:13:26,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:13:26,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-04 16:13:26,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 130 transitions, 1237 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:26,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:26,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-04 16:13:26,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:26,535 INFO L124 PetriNetUnfolderBase]: 1196/2081 cut-off events. [2024-06-04 16:13:26,536 INFO L125 PetriNetUnfolderBase]: For 34792/34792 co-relation queries the response was YES. [2024-06-04 16:13:26,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10597 conditions, 2081 events. 1196/2081 cut-off events. For 34792/34792 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 11935 event pairs, 367 based on Foata normal form. 12/2061 useless extension candidates. Maximal degree in co-relation 10540. Up to 1768 conditions per place. [2024-06-04 16:13:26,547 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 103 selfloop transitions, 21 changer transitions 0/145 dead transitions. [2024-06-04 16:13:26,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 145 transitions, 1553 flow [2024-06-04 16:13:26,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:13:26,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:13:26,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-04 16:13:26,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-04 16:13:26,549 INFO L175 Difference]: Start difference. First operand has 120 places, 130 transitions, 1237 flow. Second operand 5 states and 123 transitions. [2024-06-04 16:13:26,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 145 transitions, 1553 flow [2024-06-04 16:13:26,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 145 transitions, 1457 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-04 16:13:26,586 INFO L231 Difference]: Finished difference. Result has 121 places, 132 transitions, 1216 flow [2024-06-04 16:13:26,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1141, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1216, PETRI_PLACES=121, PETRI_TRANSITIONS=132} [2024-06-04 16:13:26,587 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 79 predicate places. [2024-06-04 16:13:26,587 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 132 transitions, 1216 flow [2024-06-04 16:13:26,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:26,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:26,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:26,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-04 16:13:26,588 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:26,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:26,588 INFO L85 PathProgramCache]: Analyzing trace with hash 2015498119, now seen corresponding path program 1 times [2024-06-04 16:13:26,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:26,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382486142] [2024-06-04 16:13:26,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:26,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:26,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:26,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:26,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:26,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382486142] [2024-06-04 16:13:26,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382486142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:26,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:26,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:13:26,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549310812] [2024-06-04 16:13:26,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:26,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:13:26,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:26,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:13:26,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:13:26,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:26,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 132 transitions, 1216 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:26,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:26,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:26,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:27,140 INFO L124 PetriNetUnfolderBase]: 1303/2248 cut-off events. [2024-06-04 16:13:27,140 INFO L125 PetriNetUnfolderBase]: For 33760/33760 co-relation queries the response was YES. [2024-06-04 16:13:27,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11475 conditions, 2248 events. 1303/2248 cut-off events. For 33760/33760 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 12864 event pairs, 377 based on Foata normal form. 1/2246 useless extension candidates. Maximal degree in co-relation 11417. Up to 2008 conditions per place. [2024-06-04 16:13:27,157 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 133 selfloop transitions, 27 changer transitions 0/167 dead transitions. [2024-06-04 16:13:27,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 167 transitions, 1851 flow [2024-06-04 16:13:27,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:13:27,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:13:27,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-04 16:13:27,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-04 16:13:27,161 INFO L175 Difference]: Start difference. First operand has 121 places, 132 transitions, 1216 flow. Second operand 8 states and 180 transitions. [2024-06-04 16:13:27,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 167 transitions, 1851 flow [2024-06-04 16:13:27,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 167 transitions, 1796 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-04 16:13:27,208 INFO L231 Difference]: Finished difference. Result has 128 places, 144 transitions, 1402 flow [2024-06-04 16:13:27,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1165, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1402, PETRI_PLACES=128, PETRI_TRANSITIONS=144} [2024-06-04 16:13:27,212 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 86 predicate places. [2024-06-04 16:13:27,212 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 144 transitions, 1402 flow [2024-06-04 16:13:27,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:27,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:27,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:27,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-04 16:13:27,213 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:27,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:27,214 INFO L85 PathProgramCache]: Analyzing trace with hash 16964453, now seen corresponding path program 2 times [2024-06-04 16:13:27,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:27,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546758927] [2024-06-04 16:13:27,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:27,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:27,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:27,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:27,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:27,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546758927] [2024-06-04 16:13:27,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546758927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:27,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:27,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:13:27,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040252742] [2024-06-04 16:13:27,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:27,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:13:27,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:27,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:13:27,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:13:27,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:27,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 144 transitions, 1402 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:27,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:27,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:27,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:27,761 INFO L124 PetriNetUnfolderBase]: 1310/2263 cut-off events. [2024-06-04 16:13:27,761 INFO L125 PetriNetUnfolderBase]: For 36201/36201 co-relation queries the response was YES. [2024-06-04 16:13:27,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11611 conditions, 2263 events. 1310/2263 cut-off events. For 36201/36201 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 12968 event pairs, 377 based on Foata normal form. 3/2262 useless extension candidates. Maximal degree in co-relation 11550. Up to 1976 conditions per place. [2024-06-04 16:13:27,775 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 121 selfloop transitions, 38 changer transitions 0/166 dead transitions. [2024-06-04 16:13:27,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 166 transitions, 1825 flow [2024-06-04 16:13:27,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:13:27,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:13:27,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-04 16:13:27,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6390243902439025 [2024-06-04 16:13:27,776 INFO L175 Difference]: Start difference. First operand has 128 places, 144 transitions, 1402 flow. Second operand 5 states and 131 transitions. [2024-06-04 16:13:27,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 166 transitions, 1825 flow [2024-06-04 16:13:27,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 166 transitions, 1757 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-04 16:13:27,841 INFO L231 Difference]: Finished difference. Result has 130 places, 148 transitions, 1500 flow [2024-06-04 16:13:27,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1334, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1500, PETRI_PLACES=130, PETRI_TRANSITIONS=148} [2024-06-04 16:13:27,841 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 88 predicate places. [2024-06-04 16:13:27,842 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 148 transitions, 1500 flow [2024-06-04 16:13:27,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:27,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:27,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:27,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-04 16:13:27,842 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:27,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:27,842 INFO L85 PathProgramCache]: Analyzing trace with hash 2123492197, now seen corresponding path program 3 times [2024-06-04 16:13:27,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:27,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711682310] [2024-06-04 16:13:27,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:27,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:27,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:28,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:28,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:28,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711682310] [2024-06-04 16:13:28,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711682310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:28,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:28,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:13:28,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47772301] [2024-06-04 16:13:28,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:28,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:13:28,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:28,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:13:28,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:13:28,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:28,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 148 transitions, 1500 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:28,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:28,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:28,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:28,335 INFO L124 PetriNetUnfolderBase]: 1307/2256 cut-off events. [2024-06-04 16:13:28,335 INFO L125 PetriNetUnfolderBase]: For 37388/37388 co-relation queries the response was YES. [2024-06-04 16:13:28,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11748 conditions, 2256 events. 1307/2256 cut-off events. For 37388/37388 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 12931 event pairs, 380 based on Foata normal form. 1/2253 useless extension candidates. Maximal degree in co-relation 11685. Up to 1941 conditions per place. [2024-06-04 16:13:28,348 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 103 selfloop transitions, 58 changer transitions 0/168 dead transitions. [2024-06-04 16:13:28,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 168 transitions, 1928 flow [2024-06-04 16:13:28,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:13:28,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:13:28,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-04 16:13:28,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-04 16:13:28,349 INFO L175 Difference]: Start difference. First operand has 130 places, 148 transitions, 1500 flow. Second operand 9 states and 198 transitions. [2024-06-04 16:13:28,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 168 transitions, 1928 flow [2024-06-04 16:13:28,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 168 transitions, 1825 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-04 16:13:28,414 INFO L231 Difference]: Finished difference. Result has 135 places, 148 transitions, 1521 flow [2024-06-04 16:13:28,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1399, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1521, PETRI_PLACES=135, PETRI_TRANSITIONS=148} [2024-06-04 16:13:28,415 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 93 predicate places. [2024-06-04 16:13:28,415 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 148 transitions, 1521 flow [2024-06-04 16:13:28,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:28,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:28,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:28,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-04 16:13:28,415 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:28,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:28,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1186196681, now seen corresponding path program 4 times [2024-06-04 16:13:28,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:28,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985635439] [2024-06-04 16:13:28,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:28,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:28,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:28,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:28,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:28,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985635439] [2024-06-04 16:13:28,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985635439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:28,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:28,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:13:28,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616277677] [2024-06-04 16:13:28,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:28,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:13:28,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:28,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:13:28,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:13:28,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:28,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 148 transitions, 1521 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:28,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:28,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:28,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:28,905 INFO L124 PetriNetUnfolderBase]: 1299/2244 cut-off events. [2024-06-04 16:13:28,905 INFO L125 PetriNetUnfolderBase]: For 36820/36820 co-relation queries the response was YES. [2024-06-04 16:13:28,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11641 conditions, 2244 events. 1299/2244 cut-off events. For 36820/36820 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 12876 event pairs, 380 based on Foata normal form. 2/2242 useless extension candidates. Maximal degree in co-relation 11578. Up to 1933 conditions per place. [2024-06-04 16:13:28,918 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 105 selfloop transitions, 52 changer transitions 0/164 dead transitions. [2024-06-04 16:13:28,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 164 transitions, 1931 flow [2024-06-04 16:13:28,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:13:28,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:13:28,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-04 16:13:28,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5457317073170732 [2024-06-04 16:13:28,919 INFO L175 Difference]: Start difference. First operand has 135 places, 148 transitions, 1521 flow. Second operand 8 states and 179 transitions. [2024-06-04 16:13:28,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 164 transitions, 1931 flow [2024-06-04 16:13:28,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 164 transitions, 1806 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-04 16:13:28,972 INFO L231 Difference]: Finished difference. Result has 137 places, 148 transitions, 1508 flow [2024-06-04 16:13:28,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1396, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1508, PETRI_PLACES=137, PETRI_TRANSITIONS=148} [2024-06-04 16:13:28,972 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 95 predicate places. [2024-06-04 16:13:28,972 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 148 transitions, 1508 flow [2024-06-04 16:13:28,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:28,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:28,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:28,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-04 16:13:28,973 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:28,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:28,973 INFO L85 PathProgramCache]: Analyzing trace with hash 676783395, now seen corresponding path program 5 times [2024-06-04 16:13:28,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:28,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707931892] [2024-06-04 16:13:28,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:28,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:28,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:29,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:29,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:29,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707931892] [2024-06-04 16:13:29,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707931892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:29,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:29,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:13:29,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210608138] [2024-06-04 16:13:29,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:29,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:13:29,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:29,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:13:29,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:13:29,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:29,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 148 transitions, 1508 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:29,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:29,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:29,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:29,418 INFO L124 PetriNetUnfolderBase]: 1291/2227 cut-off events. [2024-06-04 16:13:29,419 INFO L125 PetriNetUnfolderBase]: For 38037/38037 co-relation queries the response was YES. [2024-06-04 16:13:29,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11477 conditions, 2227 events. 1291/2227 cut-off events. For 38037/38037 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 12780 event pairs, 396 based on Foata normal form. 2/2223 useless extension candidates. Maximal degree in co-relation 11414. Up to 1899 conditions per place. [2024-06-04 16:13:29,432 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 101 selfloop transitions, 55 changer transitions 0/163 dead transitions. [2024-06-04 16:13:29,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 163 transitions, 1858 flow [2024-06-04 16:13:29,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:13:29,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:13:29,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-04 16:13:29,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.624390243902439 [2024-06-04 16:13:29,434 INFO L175 Difference]: Start difference. First operand has 137 places, 148 transitions, 1508 flow. Second operand 5 states and 128 transitions. [2024-06-04 16:13:29,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 163 transitions, 1858 flow [2024-06-04 16:13:29,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 163 transitions, 1716 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-04 16:13:29,492 INFO L231 Difference]: Finished difference. Result has 135 places, 148 transitions, 1489 flow [2024-06-04 16:13:29,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1366, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1489, PETRI_PLACES=135, PETRI_TRANSITIONS=148} [2024-06-04 16:13:29,492 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 93 predicate places. [2024-06-04 16:13:29,493 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 148 transitions, 1489 flow [2024-06-04 16:13:29,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:29,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:29,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:29,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-04 16:13:29,493 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:29,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:29,493 INFO L85 PathProgramCache]: Analyzing trace with hash 2132072005, now seen corresponding path program 1 times [2024-06-04 16:13:29,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:29,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691967056] [2024-06-04 16:13:29,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:29,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:29,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:29,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:29,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:29,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691967056] [2024-06-04 16:13:29,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691967056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:29,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:29,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:13:29,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272215101] [2024-06-04 16:13:29,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:29,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:13:29,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:29,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:13:29,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:13:29,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:29,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 148 transitions, 1489 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:29,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:29,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:29,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:29,990 INFO L124 PetriNetUnfolderBase]: 1299/2259 cut-off events. [2024-06-04 16:13:29,990 INFO L125 PetriNetUnfolderBase]: For 39906/39906 co-relation queries the response was YES. [2024-06-04 16:13:29,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11642 conditions, 2259 events. 1299/2259 cut-off events. For 39906/39906 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 12981 event pairs, 340 based on Foata normal form. 2/2259 useless extension candidates. Maximal degree in co-relation 11578. Up to 2005 conditions per place. [2024-06-04 16:13:30,004 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 144 selfloop transitions, 22 changer transitions 0/173 dead transitions. [2024-06-04 16:13:30,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 173 transitions, 2001 flow [2024-06-04 16:13:30,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:13:30,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:13:30,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-04 16:13:30,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304878048780488 [2024-06-04 16:13:30,005 INFO L175 Difference]: Start difference. First operand has 135 places, 148 transitions, 1489 flow. Second operand 8 states and 174 transitions. [2024-06-04 16:13:30,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 173 transitions, 2001 flow [2024-06-04 16:13:30,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 173 transitions, 1858 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-04 16:13:30,071 INFO L231 Difference]: Finished difference. Result has 138 places, 152 transitions, 1469 flow [2024-06-04 16:13:30,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1348, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1469, PETRI_PLACES=138, PETRI_TRANSITIONS=152} [2024-06-04 16:13:30,071 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 96 predicate places. [2024-06-04 16:13:30,071 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 152 transitions, 1469 flow [2024-06-04 16:13:30,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:30,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:30,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:30,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-04 16:13:30,072 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:30,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:30,072 INFO L85 PathProgramCache]: Analyzing trace with hash 2134928965, now seen corresponding path program 2 times [2024-06-04 16:13:30,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:30,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800445234] [2024-06-04 16:13:30,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:30,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:30,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:30,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:30,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:30,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800445234] [2024-06-04 16:13:30,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800445234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:30,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:30,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:13:30,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288840554] [2024-06-04 16:13:30,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:30,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:13:30,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:30,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:13:30,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:13:30,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:30,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 152 transitions, 1469 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:30,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:30,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:30,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:30,559 INFO L124 PetriNetUnfolderBase]: 1307/2272 cut-off events. [2024-06-04 16:13:30,559 INFO L125 PetriNetUnfolderBase]: For 40027/40027 co-relation queries the response was YES. [2024-06-04 16:13:30,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11670 conditions, 2272 events. 1307/2272 cut-off events. For 40027/40027 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 13099 event pairs, 371 based on Foata normal form. 2/2272 useless extension candidates. Maximal degree in co-relation 11606. Up to 2048 conditions per place. [2024-06-04 16:13:30,572 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 145 selfloop transitions, 18 changer transitions 0/170 dead transitions. [2024-06-04 16:13:30,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 170 transitions, 1871 flow [2024-06-04 16:13:30,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:13:30,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:13:30,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-04 16:13:30,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5152439024390244 [2024-06-04 16:13:30,573 INFO L175 Difference]: Start difference. First operand has 138 places, 152 transitions, 1469 flow. Second operand 8 states and 169 transitions. [2024-06-04 16:13:30,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 170 transitions, 1871 flow [2024-06-04 16:13:30,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 170 transitions, 1797 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-04 16:13:30,635 INFO L231 Difference]: Finished difference. Result has 142 places, 154 transitions, 1478 flow [2024-06-04 16:13:30,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1407, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1478, PETRI_PLACES=142, PETRI_TRANSITIONS=154} [2024-06-04 16:13:30,635 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 100 predicate places. [2024-06-04 16:13:30,635 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 154 transitions, 1478 flow [2024-06-04 16:13:30,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:30,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:30,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:30,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-04 16:13:30,636 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:30,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:30,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1062397301, now seen corresponding path program 3 times [2024-06-04 16:13:30,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:30,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94945678] [2024-06-04 16:13:30,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:30,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:30,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:30,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:30,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:30,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94945678] [2024-06-04 16:13:30,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94945678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:30,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:30,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:13:30,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669357896] [2024-06-04 16:13:30,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:30,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:13:30,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:30,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:13:30,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:13:30,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:30,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 154 transitions, 1478 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:30,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:30,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:30,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:31,148 INFO L124 PetriNetUnfolderBase]: 1302/2264 cut-off events. [2024-06-04 16:13:31,148 INFO L125 PetriNetUnfolderBase]: For 40847/40847 co-relation queries the response was YES. [2024-06-04 16:13:31,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11575 conditions, 2264 events. 1302/2264 cut-off events. For 40847/40847 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 12979 event pairs, 340 based on Foata normal form. 2/2264 useless extension candidates. Maximal degree in co-relation 11509. Up to 2026 conditions per place. [2024-06-04 16:13:31,161 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 147 selfloop transitions, 16 changer transitions 0/170 dead transitions. [2024-06-04 16:13:31,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 170 transitions, 1844 flow [2024-06-04 16:13:31,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:13:31,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:13:31,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-04 16:13:31,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5902439024390244 [2024-06-04 16:13:31,162 INFO L175 Difference]: Start difference. First operand has 142 places, 154 transitions, 1478 flow. Second operand 5 states and 121 transitions. [2024-06-04 16:13:31,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 170 transitions, 1844 flow [2024-06-04 16:13:31,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 170 transitions, 1777 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-04 16:13:31,225 INFO L231 Difference]: Finished difference. Result has 141 places, 154 transitions, 1451 flow [2024-06-04 16:13:31,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1411, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1451, PETRI_PLACES=141, PETRI_TRANSITIONS=154} [2024-06-04 16:13:31,226 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 99 predicate places. [2024-06-04 16:13:31,226 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 154 transitions, 1451 flow [2024-06-04 16:13:31,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:31,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:31,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:31,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-04 16:13:31,227 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:31,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:31,227 INFO L85 PathProgramCache]: Analyzing trace with hash -529221115, now seen corresponding path program 1 times [2024-06-04 16:13:31,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:31,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397538808] [2024-06-04 16:13:31,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:31,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:31,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:31,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:31,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:31,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397538808] [2024-06-04 16:13:31,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397538808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:31,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:31,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:13:31,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279655865] [2024-06-04 16:13:31,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:31,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:13:31,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:31,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:13:31,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:13:31,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-04 16:13:31,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 154 transitions, 1451 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:31,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:31,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-04 16:13:31,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:31,676 INFO L124 PetriNetUnfolderBase]: 1246/2200 cut-off events. [2024-06-04 16:13:31,676 INFO L125 PetriNetUnfolderBase]: For 45917/45917 co-relation queries the response was YES. [2024-06-04 16:13:31,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11332 conditions, 2200 events. 1246/2200 cut-off events. For 45917/45917 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 12806 event pairs, 271 based on Foata normal form. 7/2184 useless extension candidates. Maximal degree in co-relation 11265. Up to 1785 conditions per place. [2024-06-04 16:13:31,690 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 123 selfloop transitions, 27 changer transitions 1/177 dead transitions. [2024-06-04 16:13:31,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 177 transitions, 1833 flow [2024-06-04 16:13:31,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:13:31,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:13:31,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2024-06-04 16:13:31,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6536585365853659 [2024-06-04 16:13:31,691 INFO L175 Difference]: Start difference. First operand has 141 places, 154 transitions, 1451 flow. Second operand 5 states and 134 transitions. [2024-06-04 16:13:31,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 177 transitions, 1833 flow [2024-06-04 16:13:31,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 177 transitions, 1794 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-04 16:13:31,758 INFO L231 Difference]: Finished difference. Result has 142 places, 155 transitions, 1488 flow [2024-06-04 16:13:31,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1412, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1488, PETRI_PLACES=142, PETRI_TRANSITIONS=155} [2024-06-04 16:13:31,758 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 100 predicate places. [2024-06-04 16:13:31,759 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 155 transitions, 1488 flow [2024-06-04 16:13:31,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:31,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:31,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:31,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-04 16:13:31,759 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)] === [2024-06-04 16:13:31,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:31,759 INFO L85 PathProgramCache]: Analyzing trace with hash -514936315, now seen corresponding path program 2 times [2024-06-04 16:13:31,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:31,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943568510] [2024-06-04 16:13:31,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:31,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:31,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:31,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:31,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:31,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943568510] [2024-06-04 16:13:31,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943568510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:31,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:31,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:13:31,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956492865] [2024-06-04 16:13:31,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:31,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:13:31,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:31,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:13:31,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:13:31,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-04 16:13:31,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 155 transitions, 1488 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:31,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:31,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-04 16:13:31,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:32,226 INFO L124 PetriNetUnfolderBase]: 1248/2199 cut-off events. [2024-06-04 16:13:32,226 INFO L125 PetriNetUnfolderBase]: For 46541/46541 co-relation queries the response was YES. [2024-06-04 16:13:32,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11380 conditions, 2199 events. 1248/2199 cut-off events. For 46541/46541 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 12871 event pairs, 277 based on Foata normal form. 8/2184 useless extension candidates. Maximal degree in co-relation 11312. Up to 1684 conditions per place. [2024-06-04 16:13:32,240 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 127 selfloop transitions, 23 changer transitions 0/176 dead transitions. [2024-06-04 16:13:32,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 176 transitions, 1938 flow [2024-06-04 16:13:32,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:13:32,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:13:32,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-04 16:13:32,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.624390243902439 [2024-06-04 16:13:32,242 INFO L175 Difference]: Start difference. First operand has 142 places, 155 transitions, 1488 flow. Second operand 5 states and 128 transitions. [2024-06-04 16:13:32,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 176 transitions, 1938 flow [2024-06-04 16:13:32,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 176 transitions, 1888 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-04 16:13:32,306 INFO L231 Difference]: Finished difference. Result has 144 places, 156 transitions, 1500 flow [2024-06-04 16:13:32,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1438, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1500, PETRI_PLACES=144, PETRI_TRANSITIONS=156} [2024-06-04 16:13:32,306 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 102 predicate places. [2024-06-04 16:13:32,306 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 156 transitions, 1500 flow [2024-06-04 16:13:32,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:32,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:32,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:32,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-04 16:13:32,307 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:32,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:32,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1669723531, now seen corresponding path program 1 times [2024-06-04 16:13:32,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:32,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607424797] [2024-06-04 16:13:32,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:32,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:32,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:32,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:32,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:32,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607424797] [2024-06-04 16:13:32,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607424797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:32,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:32,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:13:32,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720767808] [2024-06-04 16:13:32,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:32,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:13:32,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:32,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:13:32,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:13:32,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:32,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 156 transitions, 1500 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:32,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:32,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:32,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:32,881 INFO L124 PetriNetUnfolderBase]: 1491/2580 cut-off events. [2024-06-04 16:13:32,881 INFO L125 PetriNetUnfolderBase]: For 65402/65402 co-relation queries the response was YES. [2024-06-04 16:13:32,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13927 conditions, 2580 events. 1491/2580 cut-off events. For 65402/65402 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 15225 event pairs, 356 based on Foata normal form. 12/2588 useless extension candidates. Maximal degree in co-relation 13858. Up to 1826 conditions per place. [2024-06-04 16:13:32,898 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 125 selfloop transitions, 62 changer transitions 0/194 dead transitions. [2024-06-04 16:13:32,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 194 transitions, 2234 flow [2024-06-04 16:13:32,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:13:32,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:13:32,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-04 16:13:32,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5636856368563685 [2024-06-04 16:13:32,899 INFO L175 Difference]: Start difference. First operand has 144 places, 156 transitions, 1500 flow. Second operand 9 states and 208 transitions. [2024-06-04 16:13:32,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 194 transitions, 2234 flow [2024-06-04 16:13:32,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 194 transitions, 2194 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-04 16:13:32,988 INFO L231 Difference]: Finished difference. Result has 152 places, 161 transitions, 1678 flow [2024-06-04 16:13:32,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1460, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1678, PETRI_PLACES=152, PETRI_TRANSITIONS=161} [2024-06-04 16:13:32,988 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 110 predicate places. [2024-06-04 16:13:32,988 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 161 transitions, 1678 flow [2024-06-04 16:13:32,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:32,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:32,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:32,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-04 16:13:32,989 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:32,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:32,989 INFO L85 PathProgramCache]: Analyzing trace with hash 84119731, now seen corresponding path program 2 times [2024-06-04 16:13:32,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:32,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040464407] [2024-06-04 16:13:32,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:32,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:32,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:33,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:33,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:33,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040464407] [2024-06-04 16:13:33,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040464407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:33,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:33,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:13:33,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187768208] [2024-06-04 16:13:33,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:33,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:13:33,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:33,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:13:33,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:13:33,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:33,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 161 transitions, 1678 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:33,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:33,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:33,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:33,594 INFO L124 PetriNetUnfolderBase]: 1547/2676 cut-off events. [2024-06-04 16:13:33,594 INFO L125 PetriNetUnfolderBase]: For 73250/73250 co-relation queries the response was YES. [2024-06-04 16:13:33,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14784 conditions, 2676 events. 1547/2676 cut-off events. For 73250/73250 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 15947 event pairs, 456 based on Foata normal form. 16/2688 useless extension candidates. Maximal degree in co-relation 14713. Up to 2265 conditions per place. [2024-06-04 16:13:33,614 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 120 selfloop transitions, 56 changer transitions 0/183 dead transitions. [2024-06-04 16:13:33,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 183 transitions, 2132 flow [2024-06-04 16:13:33,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:13:33,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:13:33,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-04 16:13:33,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5392953929539296 [2024-06-04 16:13:33,615 INFO L175 Difference]: Start difference. First operand has 152 places, 161 transitions, 1678 flow. Second operand 9 states and 199 transitions. [2024-06-04 16:13:33,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 183 transitions, 2132 flow [2024-06-04 16:13:33,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 183 transitions, 2040 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-04 16:13:33,718 INFO L231 Difference]: Finished difference. Result has 157 places, 163 transitions, 1742 flow [2024-06-04 16:13:33,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1586, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1742, PETRI_PLACES=157, PETRI_TRANSITIONS=163} [2024-06-04 16:13:33,720 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 115 predicate places. [2024-06-04 16:13:33,720 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 163 transitions, 1742 flow [2024-06-04 16:13:33,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:33,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:33,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:33,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-04 16:13:33,721 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:33,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:33,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1758289291, now seen corresponding path program 3 times [2024-06-04 16:13:33,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:33,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936331864] [2024-06-04 16:13:33,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:33,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:33,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:33,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:33,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:33,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936331864] [2024-06-04 16:13:33,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936331864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:33,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:33,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:13:33,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25248145] [2024-06-04 16:13:33,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:33,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:13:33,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:33,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:13:33,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:13:33,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:33,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 163 transitions, 1742 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:33,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:33,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:33,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:34,262 INFO L124 PetriNetUnfolderBase]: 1653/2848 cut-off events. [2024-06-04 16:13:34,262 INFO L125 PetriNetUnfolderBase]: For 82978/82978 co-relation queries the response was YES. [2024-06-04 16:13:34,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16261 conditions, 2848 events. 1653/2848 cut-off events. For 82978/82978 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 17235 event pairs, 465 based on Foata normal form. 12/2856 useless extension candidates. Maximal degree in co-relation 16188. Up to 2273 conditions per place. [2024-06-04 16:13:34,282 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 129 selfloop transitions, 55 changer transitions 0/191 dead transitions. [2024-06-04 16:13:34,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 191 transitions, 2344 flow [2024-06-04 16:13:34,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:13:34,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:13:34,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-04 16:13:34,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5474254742547425 [2024-06-04 16:13:34,293 INFO L175 Difference]: Start difference. First operand has 157 places, 163 transitions, 1742 flow. Second operand 9 states and 202 transitions. [2024-06-04 16:13:34,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 191 transitions, 2344 flow [2024-06-04 16:13:34,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 191 transitions, 2218 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-04 16:13:34,435 INFO L231 Difference]: Finished difference. Result has 160 places, 167 transitions, 1826 flow [2024-06-04 16:13:34,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1616, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1826, PETRI_PLACES=160, PETRI_TRANSITIONS=167} [2024-06-04 16:13:34,436 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 118 predicate places. [2024-06-04 16:13:34,436 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 167 transitions, 1826 flow [2024-06-04 16:13:34,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:34,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:34,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:34,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-04 16:13:34,436 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:34,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:34,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1877341993, now seen corresponding path program 4 times [2024-06-04 16:13:34,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:34,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942021333] [2024-06-04 16:13:34,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:34,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:34,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:34,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:34,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:34,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942021333] [2024-06-04 16:13:34,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942021333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:34,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:34,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:13:34,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352445113] [2024-06-04 16:13:34,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:34,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:13:34,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:34,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:13:34,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:13:34,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:34,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 167 transitions, 1826 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:34,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:34,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:34,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:35,068 INFO L124 PetriNetUnfolderBase]: 1785/3071 cut-off events. [2024-06-04 16:13:35,069 INFO L125 PetriNetUnfolderBase]: For 110537/110537 co-relation queries the response was YES. [2024-06-04 16:13:35,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17523 conditions, 3071 events. 1785/3071 cut-off events. For 110537/110537 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 18922 event pairs, 550 based on Foata normal form. 42/3107 useless extension candidates. Maximal degree in co-relation 17448. Up to 2487 conditions per place. [2024-06-04 16:13:35,090 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 121 selfloop transitions, 54 changer transitions 6/188 dead transitions. [2024-06-04 16:13:35,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 188 transitions, 2304 flow [2024-06-04 16:13:35,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:13:35,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:13:35,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-04 16:13:35,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-04 16:13:35,091 INFO L175 Difference]: Start difference. First operand has 160 places, 167 transitions, 1826 flow. Second operand 6 states and 148 transitions. [2024-06-04 16:13:35,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 188 transitions, 2304 flow [2024-06-04 16:13:35,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 188 transitions, 2208 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-04 16:13:35,217 INFO L231 Difference]: Finished difference. Result has 161 places, 165 transitions, 1861 flow [2024-06-04 16:13:35,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1730, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1861, PETRI_PLACES=161, PETRI_TRANSITIONS=165} [2024-06-04 16:13:35,217 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 119 predicate places. [2024-06-04 16:13:35,217 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 165 transitions, 1861 flow [2024-06-04 16:13:35,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:35,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:35,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:35,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-04 16:13:35,218 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:35,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:35,218 INFO L85 PathProgramCache]: Analyzing trace with hash 993961579, now seen corresponding path program 5 times [2024-06-04 16:13:35,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:35,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112519936] [2024-06-04 16:13:35,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:35,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:35,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:35,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:35,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:35,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112519936] [2024-06-04 16:13:35,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112519936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:35,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:35,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:13:35,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863937981] [2024-06-04 16:13:35,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:35,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:13:35,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:35,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:13:35,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:13:35,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:35,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 165 transitions, 1861 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:35,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:35,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:35,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:35,872 INFO L124 PetriNetUnfolderBase]: 1944/3352 cut-off events. [2024-06-04 16:13:35,872 INFO L125 PetriNetUnfolderBase]: For 133316/133316 co-relation queries the response was YES. [2024-06-04 16:13:35,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19857 conditions, 3352 events. 1944/3352 cut-off events. For 133316/133316 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 21081 event pairs, 503 based on Foata normal form. 36/3382 useless extension candidates. Maximal degree in co-relation 19780. Up to 1981 conditions per place. [2024-06-04 16:13:35,898 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 126 selfloop transitions, 58 changer transitions 7/198 dead transitions. [2024-06-04 16:13:35,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 198 transitions, 2543 flow [2024-06-04 16:13:35,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:13:35,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:13:35,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-04 16:13:35,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382113821138211 [2024-06-04 16:13:35,900 INFO L175 Difference]: Start difference. First operand has 161 places, 165 transitions, 1861 flow. Second operand 6 states and 157 transitions. [2024-06-04 16:13:35,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 198 transitions, 2543 flow [2024-06-04 16:13:36,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 198 transitions, 2413 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-04 16:13:36,162 INFO L231 Difference]: Finished difference. Result has 164 places, 164 transitions, 1907 flow [2024-06-04 16:13:36,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1731, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1907, PETRI_PLACES=164, PETRI_TRANSITIONS=164} [2024-06-04 16:13:36,162 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 122 predicate places. [2024-06-04 16:13:36,162 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 164 transitions, 1907 flow [2024-06-04 16:13:36,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:36,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:36,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:36,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-04 16:13:36,163 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:36,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:36,164 INFO L85 PathProgramCache]: Analyzing trace with hash -522553883, now seen corresponding path program 6 times [2024-06-04 16:13:36,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:36,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760435943] [2024-06-04 16:13:36,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:36,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:36,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:36,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:36,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:36,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760435943] [2024-06-04 16:13:36,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760435943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:36,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:36,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:13:36,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889505452] [2024-06-04 16:13:36,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:36,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:13:36,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:36,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:13:36,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:13:36,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:36,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 164 transitions, 1907 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:36,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:36,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:36,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:36,802 INFO L124 PetriNetUnfolderBase]: 1729/2983 cut-off events. [2024-06-04 16:13:36,802 INFO L125 PetriNetUnfolderBase]: For 117110/117110 co-relation queries the response was YES. [2024-06-04 16:13:36,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17390 conditions, 2983 events. 1729/2983 cut-off events. For 117110/117110 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 18382 event pairs, 516 based on Foata normal form. 42/3019 useless extension candidates. Maximal degree in co-relation 17311. Up to 2408 conditions per place. [2024-06-04 16:13:36,824 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 121 selfloop transitions, 53 changer transitions 6/187 dead transitions. [2024-06-04 16:13:36,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 187 transitions, 2396 flow [2024-06-04 16:13:36,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:13:36,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:13:36,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-04 16:13:36,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-04 16:13:36,825 INFO L175 Difference]: Start difference. First operand has 164 places, 164 transitions, 1907 flow. Second operand 8 states and 187 transitions. [2024-06-04 16:13:36,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 187 transitions, 2396 flow [2024-06-04 16:13:36,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 187 transitions, 2207 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-04 16:13:36,987 INFO L231 Difference]: Finished difference. Result has 165 places, 162 transitions, 1850 flow [2024-06-04 16:13:36,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1721, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1850, PETRI_PLACES=165, PETRI_TRANSITIONS=162} [2024-06-04 16:13:36,987 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 123 predicate places. [2024-06-04 16:13:36,987 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 162 transitions, 1850 flow [2024-06-04 16:13:36,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:36,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:36,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:36,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-04 16:13:36,988 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:36,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:36,988 INFO L85 PathProgramCache]: Analyzing trace with hash -514929371, now seen corresponding path program 1 times [2024-06-04 16:13:36,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:36,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46027996] [2024-06-04 16:13:36,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:36,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:36,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:37,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:37,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:37,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46027996] [2024-06-04 16:13:37,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46027996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:37,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:37,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:13:37,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080848381] [2024-06-04 16:13:37,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:37,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:13:37,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:37,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:13:37,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:13:37,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:37,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 162 transitions, 1850 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:37,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:37,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:37,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:37,585 INFO L124 PetriNetUnfolderBase]: 1741/3037 cut-off events. [2024-06-04 16:13:37,585 INFO L125 PetriNetUnfolderBase]: For 108966/108966 co-relation queries the response was YES. [2024-06-04 16:13:37,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16774 conditions, 3037 events. 1741/3037 cut-off events. For 108966/108966 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 18952 event pairs, 459 based on Foata normal form. 36/3067 useless extension candidates. Maximal degree in co-relation 16696. Up to 2281 conditions per place. [2024-06-04 16:13:37,606 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 119 selfloop transitions, 57 changer transitions 9/192 dead transitions. [2024-06-04 16:13:37,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 192 transitions, 2375 flow [2024-06-04 16:13:37,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:13:37,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:13:37,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-04 16:13:37,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-04 16:13:37,607 INFO L175 Difference]: Start difference. First operand has 165 places, 162 transitions, 1850 flow. Second operand 8 states and 191 transitions. [2024-06-04 16:13:37,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 192 transitions, 2375 flow [2024-06-04 16:13:37,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 192 transitions, 2243 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-04 16:13:37,768 INFO L231 Difference]: Finished difference. Result has 168 places, 161 transitions, 1852 flow [2024-06-04 16:13:37,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1718, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1852, PETRI_PLACES=168, PETRI_TRANSITIONS=161} [2024-06-04 16:13:37,769 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 126 predicate places. [2024-06-04 16:13:37,769 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 161 transitions, 1852 flow [2024-06-04 16:13:37,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:37,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:37,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:37,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-04 16:13:37,769 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:37,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:37,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1853891064, now seen corresponding path program 1 times [2024-06-04 16:13:37,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:37,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316964628] [2024-06-04 16:13:37,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:37,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:37,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:37,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:37,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:37,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316964628] [2024-06-04 16:13:37,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316964628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:37,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:37,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:13:37,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080745411] [2024-06-04 16:13:37,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:37,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:13:37,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:37,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:13:37,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:13:38,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:38,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 161 transitions, 1852 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:38,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:38,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:38,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:38,408 INFO L124 PetriNetUnfolderBase]: 1643/2866 cut-off events. [2024-06-04 16:13:38,408 INFO L125 PetriNetUnfolderBase]: For 81586/81586 co-relation queries the response was YES. [2024-06-04 16:13:38,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16231 conditions, 2866 events. 1643/2866 cut-off events. For 81586/81586 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 17615 event pairs, 463 based on Foata normal form. 1/2864 useless extension candidates. Maximal degree in co-relation 16151. Up to 2536 conditions per place. [2024-06-04 16:13:38,427 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 157 selfloop transitions, 26 changer transitions 0/190 dead transitions. [2024-06-04 16:13:38,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 190 transitions, 2336 flow [2024-06-04 16:13:38,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:13:38,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:13:38,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-04 16:13:38,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818815331010453 [2024-06-04 16:13:38,432 INFO L175 Difference]: Start difference. First operand has 168 places, 161 transitions, 1852 flow. Second operand 7 states and 167 transitions. [2024-06-04 16:13:38,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 190 transitions, 2336 flow [2024-06-04 16:13:38,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 190 transitions, 2213 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-04 16:13:38,606 INFO L231 Difference]: Finished difference. Result has 169 places, 164 transitions, 1845 flow [2024-06-04 16:13:38,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1729, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1845, PETRI_PLACES=169, PETRI_TRANSITIONS=164} [2024-06-04 16:13:38,606 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 127 predicate places. [2024-06-04 16:13:38,607 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 164 transitions, 1845 flow [2024-06-04 16:13:38,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:38,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:38,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:38,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-04 16:13:38,607 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:38,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:38,607 INFO L85 PathProgramCache]: Analyzing trace with hash -352732398, now seen corresponding path program 2 times [2024-06-04 16:13:38,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:38,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134405917] [2024-06-04 16:13:38,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:38,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:38,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:38,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:38,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:38,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134405917] [2024-06-04 16:13:38,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134405917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:38,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:38,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:13:38,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479880362] [2024-06-04 16:13:38,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:38,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:13:38,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:38,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:13:38,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:13:38,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:38,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 164 transitions, 1845 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:38,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:38,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:38,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:39,165 INFO L124 PetriNetUnfolderBase]: 1672/2918 cut-off events. [2024-06-04 16:13:39,165 INFO L125 PetriNetUnfolderBase]: For 87723/87723 co-relation queries the response was YES. [2024-06-04 16:13:39,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16842 conditions, 2918 events. 1672/2918 cut-off events. For 87723/87723 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 18045 event pairs, 463 based on Foata normal form. 1/2916 useless extension candidates. Maximal degree in co-relation 16762. Up to 2421 conditions per place. [2024-06-04 16:13:39,187 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 119 selfloop transitions, 82 changer transitions 0/208 dead transitions. [2024-06-04 16:13:39,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 208 transitions, 2811 flow [2024-06-04 16:13:39,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:13:39,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:13:39,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 249 transitions. [2024-06-04 16:13:39,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5521064301552107 [2024-06-04 16:13:39,188 INFO L175 Difference]: Start difference. First operand has 169 places, 164 transitions, 1845 flow. Second operand 11 states and 249 transitions. [2024-06-04 16:13:39,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 208 transitions, 2811 flow [2024-06-04 16:13:39,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 208 transitions, 2709 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-04 16:13:39,371 INFO L231 Difference]: Finished difference. Result has 175 places, 178 transitions, 2161 flow [2024-06-04 16:13:39,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1749, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2161, PETRI_PLACES=175, PETRI_TRANSITIONS=178} [2024-06-04 16:13:39,372 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 133 predicate places. [2024-06-04 16:13:39,372 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 178 transitions, 2161 flow [2024-06-04 16:13:39,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:39,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:39,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:39,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-04 16:13:39,372 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:39,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:39,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1996057574, now seen corresponding path program 3 times [2024-06-04 16:13:39,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:39,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816826924] [2024-06-04 16:13:39,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:39,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:39,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:39,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:39,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:39,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816826924] [2024-06-04 16:13:39,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816826924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:39,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:39,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:13:39,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162207194] [2024-06-04 16:13:39,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:39,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:13:39,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:39,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:13:39,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:13:39,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:39,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 178 transitions, 2161 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:39,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:39,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:39,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:40,043 INFO L124 PetriNetUnfolderBase]: 1677/2927 cut-off events. [2024-06-04 16:13:40,043 INFO L125 PetriNetUnfolderBase]: For 90328/90328 co-relation queries the response was YES. [2024-06-04 16:13:40,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17428 conditions, 2927 events. 1677/2927 cut-off events. For 90328/90328 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 18057 event pairs, 463 based on Foata normal form. 1/2925 useless extension candidates. Maximal degree in co-relation 17347. Up to 2425 conditions per place. [2024-06-04 16:13:40,068 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 118 selfloop transitions, 82 changer transitions 0/207 dead transitions. [2024-06-04 16:13:40,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 207 transitions, 2945 flow [2024-06-04 16:13:40,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:13:40,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:13:40,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 228 transitions. [2024-06-04 16:13:40,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5560975609756098 [2024-06-04 16:13:40,069 INFO L175 Difference]: Start difference. First operand has 175 places, 178 transitions, 2161 flow. Second operand 10 states and 228 transitions. [2024-06-04 16:13:40,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 207 transitions, 2945 flow [2024-06-04 16:13:40,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 207 transitions, 2743 flow, removed 80 selfloop flow, removed 5 redundant places. [2024-06-04 16:13:40,276 INFO L231 Difference]: Finished difference. Result has 180 places, 181 transitions, 2193 flow [2024-06-04 16:13:40,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1991, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2193, PETRI_PLACES=180, PETRI_TRANSITIONS=181} [2024-06-04 16:13:40,277 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 138 predicate places. [2024-06-04 16:13:40,277 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 181 transitions, 2193 flow [2024-06-04 16:13:40,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:40,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:40,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:40,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-04 16:13:40,277 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:40,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:40,277 INFO L85 PathProgramCache]: Analyzing trace with hash -62278894, now seen corresponding path program 4 times [2024-06-04 16:13:40,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:40,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181044066] [2024-06-04 16:13:40,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:40,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:40,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:40,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:40,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:40,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181044066] [2024-06-04 16:13:40,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181044066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:40,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:40,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:13:40,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258829989] [2024-06-04 16:13:40,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:40,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:13:40,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:40,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:13:40,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:13:40,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:40,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 181 transitions, 2193 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:40,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:40,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:40,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:40,865 INFO L124 PetriNetUnfolderBase]: 1671/2925 cut-off events. [2024-06-04 16:13:40,866 INFO L125 PetriNetUnfolderBase]: For 91475/91475 co-relation queries the response was YES. [2024-06-04 16:13:40,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17301 conditions, 2925 events. 1671/2925 cut-off events. For 91475/91475 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 18117 event pairs, 465 based on Foata normal form. 2/2924 useless extension candidates. Maximal degree in co-relation 17219. Up to 2543 conditions per place. [2024-06-04 16:13:40,931 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 159 selfloop transitions, 37 changer transitions 0/203 dead transitions. [2024-06-04 16:13:40,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 203 transitions, 2641 flow [2024-06-04 16:13:40,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:13:40,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:13:40,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-04 16:13:40,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-04 16:13:40,933 INFO L175 Difference]: Start difference. First operand has 180 places, 181 transitions, 2193 flow. Second operand 6 states and 152 transitions. [2024-06-04 16:13:40,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 203 transitions, 2641 flow [2024-06-04 16:13:41,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 203 transitions, 2450 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-04 16:13:41,087 INFO L231 Difference]: Finished difference. Result has 179 places, 181 transitions, 2088 flow [2024-06-04 16:13:41,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2002, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2088, PETRI_PLACES=179, PETRI_TRANSITIONS=181} [2024-06-04 16:13:41,087 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 137 predicate places. [2024-06-04 16:13:41,087 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 181 transitions, 2088 flow [2024-06-04 16:13:41,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:41,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:41,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:41,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-04 16:13:41,088 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)] === [2024-06-04 16:13:41,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:41,088 INFO L85 PathProgramCache]: Analyzing trace with hash -346059214, now seen corresponding path program 1 times [2024-06-04 16:13:41,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:41,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771471413] [2024-06-04 16:13:41,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:41,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:41,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:41,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:41,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:41,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771471413] [2024-06-04 16:13:41,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771471413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:41,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:41,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:13:41,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898466299] [2024-06-04 16:13:41,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:41,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:13:41,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:41,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:13:41,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:13:41,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:41,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 181 transitions, 2088 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:41,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:41,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:41,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:41,708 INFO L124 PetriNetUnfolderBase]: 1751/3026 cut-off events. [2024-06-04 16:13:41,708 INFO L125 PetriNetUnfolderBase]: For 108802/108802 co-relation queries the response was YES. [2024-06-04 16:13:41,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18582 conditions, 3026 events. 1751/3026 cut-off events. For 108802/108802 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 18695 event pairs, 465 based on Foata normal form. 2/3017 useless extension candidates. Maximal degree in co-relation 18499. Up to 2548 conditions per place. [2024-06-04 16:13:41,731 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 142 selfloop transitions, 70 changer transitions 0/219 dead transitions. [2024-06-04 16:13:41,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 219 transitions, 2813 flow [2024-06-04 16:13:41,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:13:41,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:13:41,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 227 transitions. [2024-06-04 16:13:41,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5536585365853659 [2024-06-04 16:13:41,732 INFO L175 Difference]: Start difference. First operand has 179 places, 181 transitions, 2088 flow. Second operand 10 states and 227 transitions. [2024-06-04 16:13:41,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 219 transitions, 2813 flow [2024-06-04 16:13:41,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 219 transitions, 2741 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-04 16:13:41,925 INFO L231 Difference]: Finished difference. Result has 185 places, 187 transitions, 2293 flow [2024-06-04 16:13:41,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2018, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2293, PETRI_PLACES=185, PETRI_TRANSITIONS=187} [2024-06-04 16:13:41,925 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 143 predicate places. [2024-06-04 16:13:41,926 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 187 transitions, 2293 flow [2024-06-04 16:13:41,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:41,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:41,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:41,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-04 16:13:41,926 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:41,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:41,926 INFO L85 PathProgramCache]: Analyzing trace with hash -343202254, now seen corresponding path program 2 times [2024-06-04 16:13:41,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:41,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724283530] [2024-06-04 16:13:41,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:41,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:41,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:42,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:42,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:42,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724283530] [2024-06-04 16:13:42,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724283530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:42,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:42,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:13:42,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040311598] [2024-06-04 16:13:42,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:42,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:13:42,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:42,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:13:42,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:13:42,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:42,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 187 transitions, 2293 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:42,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:42,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:42,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:42,550 INFO L124 PetriNetUnfolderBase]: 1746/3034 cut-off events. [2024-06-04 16:13:42,550 INFO L125 PetriNetUnfolderBase]: For 107602/107602 co-relation queries the response was YES. [2024-06-04 16:13:42,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18753 conditions, 3034 events. 1746/3034 cut-off events. For 107602/107602 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 18830 event pairs, 479 based on Foata normal form. 2/3031 useless extension candidates. Maximal degree in co-relation 18669. Up to 2631 conditions per place. [2024-06-04 16:13:42,573 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 140 selfloop transitions, 64 changer transitions 0/211 dead transitions. [2024-06-04 16:13:42,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 211 transitions, 2759 flow [2024-06-04 16:13:42,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:13:42,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:13:42,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-04 16:13:42,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341463414634147 [2024-06-04 16:13:42,574 INFO L175 Difference]: Start difference. First operand has 185 places, 187 transitions, 2293 flow. Second operand 10 states and 219 transitions. [2024-06-04 16:13:42,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 211 transitions, 2759 flow [2024-06-04 16:13:42,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 211 transitions, 2600 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-04 16:13:42,763 INFO L231 Difference]: Finished difference. Result has 188 places, 187 transitions, 2267 flow [2024-06-04 16:13:42,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2134, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2267, PETRI_PLACES=188, PETRI_TRANSITIONS=187} [2024-06-04 16:13:42,764 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 146 predicate places. [2024-06-04 16:13:42,764 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 187 transitions, 2267 flow [2024-06-04 16:13:42,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:42,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:42,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:42,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-04 16:13:42,764 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:42,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:42,764 INFO L85 PathProgramCache]: Analyzing trace with hash -877008668, now seen corresponding path program 3 times [2024-06-04 16:13:42,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:42,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980717147] [2024-06-04 16:13:42,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:42,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:42,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:42,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:42,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:42,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980717147] [2024-06-04 16:13:42,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980717147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:42,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:42,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:13:42,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353260346] [2024-06-04 16:13:42,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:42,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:13:42,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:42,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:13:42,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:13:43,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:43,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 187 transitions, 2267 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:43,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:43,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:43,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:43,382 INFO L124 PetriNetUnfolderBase]: 1723/2998 cut-off events. [2024-06-04 16:13:43,382 INFO L125 PetriNetUnfolderBase]: For 109183/109183 co-relation queries the response was YES. [2024-06-04 16:13:43,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18069 conditions, 2998 events. 1723/2998 cut-off events. For 109183/109183 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 18618 event pairs, 460 based on Foata normal form. 10/3003 useless extension candidates. Maximal degree in co-relation 17984. Up to 2490 conditions per place. [2024-06-04 16:13:43,405 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 173 selfloop transitions, 35 changer transitions 0/215 dead transitions. [2024-06-04 16:13:43,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 215 transitions, 2791 flow [2024-06-04 16:13:43,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:13:43,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:13:43,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-04 16:13:43,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-04 16:13:43,406 INFO L175 Difference]: Start difference. First operand has 188 places, 187 transitions, 2267 flow. Second operand 6 states and 156 transitions. [2024-06-04 16:13:43,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 215 transitions, 2791 flow [2024-06-04 16:13:43,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 215 transitions, 2607 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-04 16:13:43,595 INFO L231 Difference]: Finished difference. Result has 185 places, 187 transitions, 2166 flow [2024-06-04 16:13:43,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2083, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2166, PETRI_PLACES=185, PETRI_TRANSITIONS=187} [2024-06-04 16:13:43,595 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 143 predicate places. [2024-06-04 16:13:43,595 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 187 transitions, 2166 flow [2024-06-04 16:13:43,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:43,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:43,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:43,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-04 16:13:43,595 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:43,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:43,596 INFO L85 PathProgramCache]: Analyzing trace with hash -2084475882, now seen corresponding path program 5 times [2024-06-04 16:13:43,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:43,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738053449] [2024-06-04 16:13:43,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:43,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:43,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:43,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:43,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:43,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738053449] [2024-06-04 16:13:43,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738053449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:43,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:43,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:13:43,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984717977] [2024-06-04 16:13:43,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:43,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:13:43,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:43,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:13:43,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:13:43,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:43,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 187 transitions, 2166 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:43,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:43,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:43,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:44,170 INFO L124 PetriNetUnfolderBase]: 1728/3005 cut-off events. [2024-06-04 16:13:44,171 INFO L125 PetriNetUnfolderBase]: For 102244/102244 co-relation queries the response was YES. [2024-06-04 16:13:44,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18047 conditions, 3005 events. 1728/3005 cut-off events. For 102244/102244 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 18704 event pairs, 481 based on Foata normal form. 1/3000 useless extension candidates. Maximal degree in co-relation 17961. Up to 2504 conditions per place. [2024-06-04 16:13:44,194 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 130 selfloop transitions, 79 changer transitions 0/216 dead transitions. [2024-06-04 16:13:44,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 216 transitions, 2880 flow [2024-06-04 16:13:44,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:13:44,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:13:44,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 243 transitions. [2024-06-04 16:13:44,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5388026607538803 [2024-06-04 16:13:44,195 INFO L175 Difference]: Start difference. First operand has 185 places, 187 transitions, 2166 flow. Second operand 11 states and 243 transitions. [2024-06-04 16:13:44,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 216 transitions, 2880 flow [2024-06-04 16:13:44,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 216 transitions, 2821 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-04 16:13:44,451 INFO L231 Difference]: Finished difference. Result has 192 places, 190 transitions, 2317 flow [2024-06-04 16:13:44,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2107, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2317, PETRI_PLACES=192, PETRI_TRANSITIONS=190} [2024-06-04 16:13:44,451 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 150 predicate places. [2024-06-04 16:13:44,452 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 190 transitions, 2317 flow [2024-06-04 16:13:44,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:44,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:44,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:44,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-04 16:13:44,452 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:44,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:44,452 INFO L85 PathProgramCache]: Analyzing trace with hash 566549956, now seen corresponding path program 6 times [2024-06-04 16:13:44,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:44,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217415997] [2024-06-04 16:13:44,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:44,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:44,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:44,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:44,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:44,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217415997] [2024-06-04 16:13:44,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217415997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:44,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:44,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:13:44,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335908450] [2024-06-04 16:13:44,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:44,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:13:44,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:44,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:13:44,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:13:44,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:44,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 190 transitions, 2317 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:44,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:44,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:44,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:45,040 INFO L124 PetriNetUnfolderBase]: 1733/3014 cut-off events. [2024-06-04 16:13:45,040 INFO L125 PetriNetUnfolderBase]: For 106428/106428 co-relation queries the response was YES. [2024-06-04 16:13:45,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18310 conditions, 3014 events. 1733/3014 cut-off events. For 106428/106428 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 18768 event pairs, 481 based on Foata normal form. 1/3009 useless extension candidates. Maximal degree in co-relation 18223. Up to 2508 conditions per place. [2024-06-04 16:13:45,067 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 129 selfloop transitions, 79 changer transitions 0/215 dead transitions. [2024-06-04 16:13:45,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 215 transitions, 3029 flow [2024-06-04 16:13:45,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:13:45,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:13:45,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 224 transitions. [2024-06-04 16:13:45,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5463414634146342 [2024-06-04 16:13:45,068 INFO L175 Difference]: Start difference. First operand has 192 places, 190 transitions, 2317 flow. Second operand 10 states and 224 transitions. [2024-06-04 16:13:45,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 215 transitions, 3029 flow [2024-06-04 16:13:45,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 215 transitions, 2812 flow, removed 36 selfloop flow, removed 8 redundant places. [2024-06-04 16:13:45,343 INFO L231 Difference]: Finished difference. Result has 194 places, 193 transitions, 2316 flow [2024-06-04 16:13:45,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2116, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2316, PETRI_PLACES=194, PETRI_TRANSITIONS=193} [2024-06-04 16:13:45,343 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 152 predicate places. [2024-06-04 16:13:45,344 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 193 transitions, 2316 flow [2024-06-04 16:13:45,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:45,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:45,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:45,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-04 16:13:45,344 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:45,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:45,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1925389892, now seen corresponding path program 7 times [2024-06-04 16:13:45,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:45,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856084324] [2024-06-04 16:13:45,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:45,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:45,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:45,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:45,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:45,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856084324] [2024-06-04 16:13:45,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856084324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:45,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:45,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:13:45,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70438265] [2024-06-04 16:13:45,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:45,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:13:45,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:45,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:13:45,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:13:45,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:45,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 193 transitions, 2316 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:45,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:45,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:45,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:45,893 INFO L124 PetriNetUnfolderBase]: 1751/3029 cut-off events. [2024-06-04 16:13:45,893 INFO L125 PetriNetUnfolderBase]: For 112882/112882 co-relation queries the response was YES. [2024-06-04 16:13:45,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18430 conditions, 3029 events. 1751/3029 cut-off events. For 112882/112882 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 18769 event pairs, 469 based on Foata normal form. 2/3025 useless extension candidates. Maximal degree in co-relation 18344. Up to 2527 conditions per place. [2024-06-04 16:13:45,917 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 134 selfloop transitions, 77 changer transitions 0/218 dead transitions. [2024-06-04 16:13:45,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 218 transitions, 3072 flow [2024-06-04 16:13:45,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:13:45,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:13:45,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-04 16:13:45,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5528455284552846 [2024-06-04 16:13:45,918 INFO L175 Difference]: Start difference. First operand has 194 places, 193 transitions, 2316 flow. Second operand 9 states and 204 transitions. [2024-06-04 16:13:45,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 218 transitions, 3072 flow [2024-06-04 16:13:46,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 218 transitions, 2903 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-04 16:13:46,175 INFO L231 Difference]: Finished difference. Result has 196 places, 200 transitions, 2406 flow [2024-06-04 16:13:46,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2157, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2406, PETRI_PLACES=196, PETRI_TRANSITIONS=200} [2024-06-04 16:13:46,176 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 154 predicate places. [2024-06-04 16:13:46,176 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 200 transitions, 2406 flow [2024-06-04 16:13:46,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:46,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:46,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:46,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-04 16:13:46,177 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:46,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:46,177 INFO L85 PathProgramCache]: Analyzing trace with hash -864152488, now seen corresponding path program 8 times [2024-06-04 16:13:46,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:46,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540542505] [2024-06-04 16:13:46,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:46,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:46,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:46,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:46,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:46,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540542505] [2024-06-04 16:13:46,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540542505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:46,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:46,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:13:46,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006099534] [2024-06-04 16:13:46,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:46,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:13:46,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:46,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:13:46,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:13:46,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:46,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 200 transitions, 2406 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:46,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:46,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:46,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:46,782 INFO L124 PetriNetUnfolderBase]: 1745/3021 cut-off events. [2024-06-04 16:13:46,782 INFO L125 PetriNetUnfolderBase]: For 114488/114488 co-relation queries the response was YES. [2024-06-04 16:13:46,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18351 conditions, 3021 events. 1745/3021 cut-off events. For 114488/114488 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 18738 event pairs, 478 based on Foata normal form. 2/3017 useless extension candidates. Maximal degree in co-relation 18264. Up to 2584 conditions per place. [2024-06-04 16:13:46,807 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 159 selfloop transitions, 54 changer transitions 0/220 dead transitions. [2024-06-04 16:13:46,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 220 transitions, 2982 flow [2024-06-04 16:13:46,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:13:46,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:13:46,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-04 16:13:46,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-04 16:13:46,808 INFO L175 Difference]: Start difference. First operand has 196 places, 200 transitions, 2406 flow. Second operand 6 states and 152 transitions. [2024-06-04 16:13:46,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 220 transitions, 2982 flow [2024-06-04 16:13:47,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 220 transitions, 2834 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-04 16:13:47,095 INFO L231 Difference]: Finished difference. Result has 197 places, 200 transitions, 2377 flow [2024-06-04 16:13:47,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2258, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2377, PETRI_PLACES=197, PETRI_TRANSITIONS=200} [2024-06-04 16:13:47,096 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 155 predicate places. [2024-06-04 16:13:47,096 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 200 transitions, 2377 flow [2024-06-04 16:13:47,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:47,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:47,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:47,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-04 16:13:47,096 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:47,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:47,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1998568288, now seen corresponding path program 4 times [2024-06-04 16:13:47,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:47,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497920359] [2024-06-04 16:13:47,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:47,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:47,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:47,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:47,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:47,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497920359] [2024-06-04 16:13:47,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497920359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:47,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:47,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:13:47,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372387748] [2024-06-04 16:13:47,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:47,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:13:47,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:47,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:13:47,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:13:47,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:47,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 200 transitions, 2377 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:47,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:47,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:47,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:47,787 INFO L124 PetriNetUnfolderBase]: 1871/3249 cut-off events. [2024-06-04 16:13:47,787 INFO L125 PetriNetUnfolderBase]: For 146838/146838 co-relation queries the response was YES. [2024-06-04 16:13:47,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20738 conditions, 3249 events. 1871/3249 cut-off events. For 146838/146838 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 20477 event pairs, 510 based on Foata normal form. 2/3245 useless extension candidates. Maximal degree in co-relation 20650. Up to 2679 conditions per place. [2024-06-04 16:13:47,814 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 163 selfloop transitions, 65 changer transitions 0/235 dead transitions. [2024-06-04 16:13:47,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 235 transitions, 3150 flow [2024-06-04 16:13:47,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:13:47,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:13:47,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 223 transitions. [2024-06-04 16:13:47,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5439024390243903 [2024-06-04 16:13:47,815 INFO L175 Difference]: Start difference. First operand has 197 places, 200 transitions, 2377 flow. Second operand 10 states and 223 transitions. [2024-06-04 16:13:47,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 235 transitions, 3150 flow [2024-06-04 16:13:48,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 235 transitions, 3078 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-04 16:13:48,087 INFO L231 Difference]: Finished difference. Result has 204 places, 206 transitions, 2585 flow [2024-06-04 16:13:48,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2307, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2585, PETRI_PLACES=204, PETRI_TRANSITIONS=206} [2024-06-04 16:13:48,087 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 162 predicate places. [2024-06-04 16:13:48,088 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 206 transitions, 2585 flow [2024-06-04 16:13:48,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:48,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:48,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:48,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-04 16:13:48,088 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:48,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:48,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1707088698, now seen corresponding path program 5 times [2024-06-04 16:13:48,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:48,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755327543] [2024-06-04 16:13:48,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:48,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:48,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:48,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:48,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:48,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755327543] [2024-06-04 16:13:48,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755327543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:48,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:48,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:13:48,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082356839] [2024-06-04 16:13:48,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:48,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:13:48,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:48,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:13:48,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:13:48,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:48,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 206 transitions, 2585 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:48,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:48,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:48,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:48,751 INFO L124 PetriNetUnfolderBase]: 1879/3268 cut-off events. [2024-06-04 16:13:48,751 INFO L125 PetriNetUnfolderBase]: For 148648/148648 co-relation queries the response was YES. [2024-06-04 16:13:48,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21161 conditions, 3268 events. 1879/3268 cut-off events. For 148648/148648 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 20656 event pairs, 519 based on Foata normal form. 2/3266 useless extension candidates. Maximal degree in co-relation 21072. Up to 2831 conditions per place. [2024-06-04 16:13:48,775 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 163 selfloop transitions, 59 changer transitions 0/229 dead transitions. [2024-06-04 16:13:48,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 229 transitions, 3125 flow [2024-06-04 16:13:48,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:13:48,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:13:48,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 215 transitions. [2024-06-04 16:13:48,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-04 16:13:48,776 INFO L175 Difference]: Start difference. First operand has 204 places, 206 transitions, 2585 flow. Second operand 10 states and 215 transitions. [2024-06-04 16:13:48,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 229 transitions, 3125 flow [2024-06-04 16:13:49,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 229 transitions, 2966 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-04 16:13:49,065 INFO L231 Difference]: Finished difference. Result has 207 places, 208 transitions, 2599 flow [2024-06-04 16:13:49,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2434, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2599, PETRI_PLACES=207, PETRI_TRANSITIONS=208} [2024-06-04 16:13:49,066 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 165 predicate places. [2024-06-04 16:13:49,066 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 208 transitions, 2599 flow [2024-06-04 16:13:49,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:49,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:49,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:49,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-04 16:13:49,066 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)] === [2024-06-04 16:13:49,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:49,066 INFO L85 PathProgramCache]: Analyzing trace with hash 221422918, now seen corresponding path program 6 times [2024-06-04 16:13:49,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:49,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515604867] [2024-06-04 16:13:49,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:49,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:49,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:49,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:49,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:49,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515604867] [2024-06-04 16:13:49,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515604867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:49,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:49,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:13:49,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954963426] [2024-06-04 16:13:49,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:49,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:13:49,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:49,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:13:49,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:13:49,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:49,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 208 transitions, 2599 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:49,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:49,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:49,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:49,716 INFO L124 PetriNetUnfolderBase]: 1887/3276 cut-off events. [2024-06-04 16:13:49,716 INFO L125 PetriNetUnfolderBase]: For 153166/153166 co-relation queries the response was YES. [2024-06-04 16:13:49,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21173 conditions, 3276 events. 1887/3276 cut-off events. For 153166/153166 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 20633 event pairs, 391 based on Foata normal form. 2/3274 useless extension candidates. Maximal degree in co-relation 21083. Up to 1917 conditions per place. [2024-06-04 16:13:49,743 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 153 selfloop transitions, 83 changer transitions 0/243 dead transitions. [2024-06-04 16:13:49,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 243 transitions, 3448 flow [2024-06-04 16:13:49,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:13:49,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:13:49,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-04 16:13:49,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-04 16:13:49,744 INFO L175 Difference]: Start difference. First operand has 207 places, 208 transitions, 2599 flow. Second operand 9 states and 210 transitions. [2024-06-04 16:13:49,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 243 transitions, 3448 flow [2024-06-04 16:13:50,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 243 transitions, 3311 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-04 16:13:50,062 INFO L231 Difference]: Finished difference. Result has 208 places, 210 transitions, 2670 flow [2024-06-04 16:13:50,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2462, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2670, PETRI_PLACES=208, PETRI_TRANSITIONS=210} [2024-06-04 16:13:50,063 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 166 predicate places. [2024-06-04 16:13:50,063 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 210 transitions, 2670 flow [2024-06-04 16:13:50,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:50,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:50,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:50,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-04 16:13:50,063 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:50,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:50,063 INFO L85 PathProgramCache]: Analyzing trace with hash 163633436, now seen corresponding path program 7 times [2024-06-04 16:13:50,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:50,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415144563] [2024-06-04 16:13:50,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:50,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:50,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:50,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:50,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:50,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415144563] [2024-06-04 16:13:50,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415144563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:50,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:50,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:13:50,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030044202] [2024-06-04 16:13:50,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:50,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:13:50,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:50,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:13:50,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:13:50,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:50,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 210 transitions, 2670 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:50,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:50,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:50,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:50,737 INFO L124 PetriNetUnfolderBase]: 1862/3229 cut-off events. [2024-06-04 16:13:50,737 INFO L125 PetriNetUnfolderBase]: For 157639/157639 co-relation queries the response was YES. [2024-06-04 16:13:50,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21009 conditions, 3229 events. 1862/3229 cut-off events. For 157639/157639 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 20248 event pairs, 429 based on Foata normal form. 8/3233 useless extension candidates. Maximal degree in co-relation 20918. Up to 1903 conditions per place. [2024-06-04 16:13:50,765 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 158 selfloop transitions, 75 changer transitions 0/240 dead transitions. [2024-06-04 16:13:50,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 240 transitions, 3358 flow [2024-06-04 16:13:50,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:13:50,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:13:50,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 207 transitions. [2024-06-04 16:13:50,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-04 16:13:50,766 INFO L175 Difference]: Start difference. First operand has 208 places, 210 transitions, 2670 flow. Second operand 9 states and 207 transitions. [2024-06-04 16:13:50,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 240 transitions, 3358 flow [2024-06-04 16:13:51,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 240 transitions, 3126 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-04 16:13:51,088 INFO L231 Difference]: Finished difference. Result has 209 places, 210 transitions, 2594 flow [2024-06-04 16:13:51,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2438, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2594, PETRI_PLACES=209, PETRI_TRANSITIONS=210} [2024-06-04 16:13:51,088 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 167 predicate places. [2024-06-04 16:13:51,089 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 210 transitions, 2594 flow [2024-06-04 16:13:51,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:51,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:51,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:51,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-04 16:13:51,089 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)] === [2024-06-04 16:13:51,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:51,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1385795300, now seen corresponding path program 8 times [2024-06-04 16:13:51,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:51,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921567716] [2024-06-04 16:13:51,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:51,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:51,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:51,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:51,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:51,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921567716] [2024-06-04 16:13:51,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921567716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:51,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:51,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:13:51,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881729876] [2024-06-04 16:13:51,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:51,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:13:51,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:51,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:13:51,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:13:51,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:51,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 210 transitions, 2594 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:51,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:51,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:51,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:51,708 INFO L124 PetriNetUnfolderBase]: 1839/3210 cut-off events. [2024-06-04 16:13:51,708 INFO L125 PetriNetUnfolderBase]: For 149011/149011 co-relation queries the response was YES. [2024-06-04 16:13:51,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19990 conditions, 3210 events. 1839/3210 cut-off events. For 149011/149011 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 20307 event pairs, 483 based on Foata normal form. 10/3216 useless extension candidates. Maximal degree in co-relation 19900. Up to 2503 conditions per place. [2024-06-04 16:13:51,735 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 170 selfloop transitions, 58 changer transitions 0/235 dead transitions. [2024-06-04 16:13:51,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 235 transitions, 3270 flow [2024-06-04 16:13:51,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:13:51,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:13:51,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-04 16:13:51,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5501355013550135 [2024-06-04 16:13:51,736 INFO L175 Difference]: Start difference. First operand has 209 places, 210 transitions, 2594 flow. Second operand 9 states and 203 transitions. [2024-06-04 16:13:51,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 235 transitions, 3270 flow [2024-06-04 16:13:52,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 235 transitions, 3102 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-04 16:13:52,071 INFO L231 Difference]: Finished difference. Result has 210 places, 210 transitions, 2549 flow [2024-06-04 16:13:52,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2426, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2549, PETRI_PLACES=210, PETRI_TRANSITIONS=210} [2024-06-04 16:13:52,072 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 168 predicate places. [2024-06-04 16:13:52,072 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 210 transitions, 2549 flow [2024-06-04 16:13:52,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:52,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:52,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:52,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-04 16:13:52,073 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:52,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:52,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1700423526, now seen corresponding path program 9 times [2024-06-04 16:13:52,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:52,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722751165] [2024-06-04 16:13:52,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:52,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:52,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:52,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:52,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:52,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722751165] [2024-06-04 16:13:52,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722751165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:52,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:52,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:13:52,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831474360] [2024-06-04 16:13:52,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:52,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:13:52,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:52,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:13:52,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:13:52,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:52,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 210 transitions, 2549 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:52,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:52,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:52,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:52,699 INFO L124 PetriNetUnfolderBase]: 1809/3162 cut-off events. [2024-06-04 16:13:52,699 INFO L125 PetriNetUnfolderBase]: For 137452/137452 co-relation queries the response was YES. [2024-06-04 16:13:52,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19019 conditions, 3162 events. 1809/3162 cut-off events. For 137452/137452 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 19975 event pairs, 489 based on Foata normal form. 10/3168 useless extension candidates. Maximal degree in co-relation 18928. Up to 2693 conditions per place. [2024-06-04 16:13:52,725 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 170 selfloop transitions, 53 changer transitions 0/230 dead transitions. [2024-06-04 16:13:52,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 230 transitions, 3069 flow [2024-06-04 16:13:52,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:13:52,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:13:52,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-04 16:13:52,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5392953929539296 [2024-06-04 16:13:52,727 INFO L175 Difference]: Start difference. First operand has 210 places, 210 transitions, 2549 flow. Second operand 9 states and 199 transitions. [2024-06-04 16:13:52,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 230 transitions, 3069 flow [2024-06-04 16:13:53,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 230 transitions, 2948 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-04 16:13:53,122 INFO L231 Difference]: Finished difference. Result has 213 places, 210 transitions, 2540 flow [2024-06-04 16:13:53,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2428, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2540, PETRI_PLACES=213, PETRI_TRANSITIONS=210} [2024-06-04 16:13:53,123 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 171 predicate places. [2024-06-04 16:13:53,123 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 210 transitions, 2540 flow [2024-06-04 16:13:53,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:53,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:53,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:53,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-04 16:13:53,123 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:53,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:53,124 INFO L85 PathProgramCache]: Analyzing trace with hash -864145544, now seen corresponding path program 10 times [2024-06-04 16:13:53,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:53,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061753052] [2024-06-04 16:13:53,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:53,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:53,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:53,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:53,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:53,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061753052] [2024-06-04 16:13:53,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061753052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:53,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:53,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:13:53,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168964042] [2024-06-04 16:13:53,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:53,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:13:53,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:53,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:13:53,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:13:53,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:53,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 210 transitions, 2540 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:53,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:53,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:53,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:53,792 INFO L124 PetriNetUnfolderBase]: 1786/3119 cut-off events. [2024-06-04 16:13:53,792 INFO L125 PetriNetUnfolderBase]: For 124822/124822 co-relation queries the response was YES. [2024-06-04 16:13:53,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18144 conditions, 3119 events. 1786/3119 cut-off events. For 124822/124822 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 19713 event pairs, 488 based on Foata normal form. 10/3123 useless extension candidates. Maximal degree in co-relation 18052. Up to 2633 conditions per place. [2024-06-04 16:13:53,820 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 179 selfloop transitions, 47 changer transitions 0/233 dead transitions. [2024-06-04 16:13:53,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 233 transitions, 3076 flow [2024-06-04 16:13:53,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:13:53,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:13:53,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-04 16:13:53,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-04 16:13:53,821 INFO L175 Difference]: Start difference. First operand has 213 places, 210 transitions, 2540 flow. Second operand 6 states and 153 transitions. [2024-06-04 16:13:53,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 233 transitions, 3076 flow [2024-06-04 16:13:54,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 233 transitions, 2918 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-04 16:13:54,147 INFO L231 Difference]: Finished difference. Result has 210 places, 210 transitions, 2485 flow [2024-06-04 16:13:54,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2382, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2485, PETRI_PLACES=210, PETRI_TRANSITIONS=210} [2024-06-04 16:13:54,147 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 168 predicate places. [2024-06-04 16:13:54,148 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 210 transitions, 2485 flow [2024-06-04 16:13:54,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:54,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:54,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:54,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-04 16:13:54,148 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:54,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:54,148 INFO L85 PathProgramCache]: Analyzing trace with hash -907286394, now seen corresponding path program 11 times [2024-06-04 16:13:54,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:54,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662307643] [2024-06-04 16:13:54,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:54,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:54,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:54,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:54,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:54,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662307643] [2024-06-04 16:13:54,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662307643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:54,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:54,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:13:54,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311572764] [2024-06-04 16:13:54,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:54,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:13:54,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:54,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:13:54,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:13:54,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:54,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 210 transitions, 2485 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:54,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:54,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:54,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:54,772 INFO L124 PetriNetUnfolderBase]: 1756/3068 cut-off events. [2024-06-04 16:13:54,773 INFO L125 PetriNetUnfolderBase]: For 110415/110415 co-relation queries the response was YES. [2024-06-04 16:13:54,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17200 conditions, 3068 events. 1756/3068 cut-off events. For 110415/110415 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 19350 event pairs, 375 based on Foata normal form. 10/3072 useless extension candidates. Maximal degree in co-relation 17107. Up to 2126 conditions per place. [2024-06-04 16:13:54,799 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 174 selfloop transitions, 58 changer transitions 0/239 dead transitions. [2024-06-04 16:13:54,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 239 transitions, 3085 flow [2024-06-04 16:13:54,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:13:54,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:13:54,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-04 16:13:54,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6422764227642277 [2024-06-04 16:13:54,800 INFO L175 Difference]: Start difference. First operand has 210 places, 210 transitions, 2485 flow. Second operand 6 states and 158 transitions. [2024-06-04 16:13:54,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 239 transitions, 3085 flow [2024-06-04 16:13:55,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 239 transitions, 2968 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-04 16:13:55,148 INFO L231 Difference]: Finished difference. Result has 211 places, 210 transitions, 2495 flow [2024-06-04 16:13:55,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2368, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2495, PETRI_PLACES=211, PETRI_TRANSITIONS=210} [2024-06-04 16:13:55,149 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 169 predicate places. [2024-06-04 16:13:55,149 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 210 transitions, 2495 flow [2024-06-04 16:13:55,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:55,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:55,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:55,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-04 16:13:55,149 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:55,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:55,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1636047320, now seen corresponding path program 1 times [2024-06-04 16:13:55,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:55,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886699884] [2024-06-04 16:13:55,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:55,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:55,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:55,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:55,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:55,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886699884] [2024-06-04 16:13:55,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886699884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:55,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:55,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:13:55,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419631162] [2024-06-04 16:13:55,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:55,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:13:55,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:55,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:13:55,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:13:55,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:55,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 210 transitions, 2495 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:55,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:55,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:55,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:55,754 INFO L124 PetriNetUnfolderBase]: 1761/3077 cut-off events. [2024-06-04 16:13:55,754 INFO L125 PetriNetUnfolderBase]: For 99397/99397 co-relation queries the response was YES. [2024-06-04 16:13:55,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17384 conditions, 3077 events. 1761/3077 cut-off events. For 99397/99397 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 19425 event pairs, 482 based on Foata normal form. 1/3072 useless extension candidates. Maximal degree in co-relation 17290. Up to 2619 conditions per place. [2024-06-04 16:13:55,778 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 159 selfloop transitions, 60 changer transitions 0/226 dead transitions. [2024-06-04 16:13:55,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 226 transitions, 3001 flow [2024-06-04 16:13:55,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:13:55,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:13:55,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-04 16:13:55,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-04 16:13:55,780 INFO L175 Difference]: Start difference. First operand has 211 places, 210 transitions, 2495 flow. Second operand 6 states and 146 transitions. [2024-06-04 16:13:55,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 226 transitions, 3001 flow [2024-06-04 16:13:56,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 226 transitions, 2804 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-04 16:13:56,117 INFO L231 Difference]: Finished difference. Result has 210 places, 213 transitions, 2474 flow [2024-06-04 16:13:56,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2298, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2474, PETRI_PLACES=210, PETRI_TRANSITIONS=213} [2024-06-04 16:13:56,117 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 168 predicate places. [2024-06-04 16:13:56,117 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 213 transitions, 2474 flow [2024-06-04 16:13:56,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:56,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:56,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:56,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-04 16:13:56,118 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)] === [2024-06-04 16:13:56,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:56,118 INFO L85 PathProgramCache]: Analyzing trace with hash -233111926, now seen corresponding path program 2 times [2024-06-04 16:13:56,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:56,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383107309] [2024-06-04 16:13:56,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:56,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:56,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:56,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:56,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:56,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383107309] [2024-06-04 16:13:56,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383107309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:56,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:56,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:13:56,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057469658] [2024-06-04 16:13:56,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:56,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:13:56,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:56,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:13:56,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:13:56,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:56,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 213 transitions, 2474 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:56,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:56,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:56,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:56,697 INFO L124 PetriNetUnfolderBase]: 1766/3086 cut-off events. [2024-06-04 16:13:56,697 INFO L125 PetriNetUnfolderBase]: For 99619/99619 co-relation queries the response was YES. [2024-06-04 16:13:56,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17146 conditions, 3086 events. 1766/3086 cut-off events. For 99619/99619 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 19523 event pairs, 474 based on Foata normal form. 1/3081 useless extension candidates. Maximal degree in co-relation 17051. Up to 2551 conditions per place. [2024-06-04 16:13:56,724 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 139 selfloop transitions, 91 changer transitions 0/237 dead transitions. [2024-06-04 16:13:56,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 237 transitions, 3144 flow [2024-06-04 16:13:56,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:13:56,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:13:56,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 220 transitions. [2024-06-04 16:13:56,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-04 16:13:56,725 INFO L175 Difference]: Start difference. First operand has 210 places, 213 transitions, 2474 flow. Second operand 10 states and 220 transitions. [2024-06-04 16:13:56,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 237 transitions, 3144 flow [2024-06-04 16:13:57,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 237 transitions, 3010 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-04 16:13:57,147 INFO L231 Difference]: Finished difference. Result has 215 places, 216 transitions, 2573 flow [2024-06-04 16:13:57,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2342, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2573, PETRI_PLACES=215, PETRI_TRANSITIONS=216} [2024-06-04 16:13:57,148 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 173 predicate places. [2024-06-04 16:13:57,148 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 216 transitions, 2573 flow [2024-06-04 16:13:57,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:57,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:57,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:57,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-04 16:13:57,148 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)] === [2024-06-04 16:13:57,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:57,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1186339152, now seen corresponding path program 3 times [2024-06-04 16:13:57,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:57,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102893327] [2024-06-04 16:13:57,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:57,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:57,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:57,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:57,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:57,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102893327] [2024-06-04 16:13:57,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102893327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:57,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:57,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:13:57,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246684589] [2024-06-04 16:13:57,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:57,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:13:57,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:57,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:13:57,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:13:57,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:57,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 216 transitions, 2573 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:57,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:57,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:57,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:57,767 INFO L124 PetriNetUnfolderBase]: 1771/3095 cut-off events. [2024-06-04 16:13:57,767 INFO L125 PetriNetUnfolderBase]: For 100205/100205 co-relation queries the response was YES. [2024-06-04 16:13:57,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17280 conditions, 3095 events. 1771/3095 cut-off events. For 100205/100205 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 19551 event pairs, 474 based on Foata normal form. 1/3090 useless extension candidates. Maximal degree in co-relation 17185. Up to 2557 conditions per place. [2024-06-04 16:13:57,791 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 137 selfloop transitions, 93 changer transitions 0/237 dead transitions. [2024-06-04 16:13:57,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 237 transitions, 3359 flow [2024-06-04 16:13:57,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:13:57,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:13:57,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-04 16:13:57,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5528455284552846 [2024-06-04 16:13:57,792 INFO L175 Difference]: Start difference. First operand has 215 places, 216 transitions, 2573 flow. Second operand 9 states and 204 transitions. [2024-06-04 16:13:57,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 237 transitions, 3359 flow [2024-06-04 16:13:58,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 237 transitions, 3159 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-04 16:13:58,116 INFO L231 Difference]: Finished difference. Result has 217 places, 219 transitions, 2613 flow [2024-06-04 16:13:58,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2382, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2613, PETRI_PLACES=217, PETRI_TRANSITIONS=219} [2024-06-04 16:13:58,117 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 175 predicate places. [2024-06-04 16:13:58,117 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 219 transitions, 2613 flow [2024-06-04 16:13:58,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:58,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:58,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:58,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-04 16:13:58,117 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)] === [2024-06-04 16:13:58,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:58,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1186695342, now seen corresponding path program 4 times [2024-06-04 16:13:58,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:58,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55604423] [2024-06-04 16:13:58,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:58,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:58,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:58,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:58,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:58,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55604423] [2024-06-04 16:13:58,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55604423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:58,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:58,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:13:58,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802739795] [2024-06-04 16:13:58,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:58,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:13:58,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:58,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:13:58,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:13:58,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:58,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 219 transitions, 2613 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:58,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:58,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:58,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:58,658 INFO L124 PetriNetUnfolderBase]: 1768/3091 cut-off events. [2024-06-04 16:13:58,659 INFO L125 PetriNetUnfolderBase]: For 101214/101214 co-relation queries the response was YES. [2024-06-04 16:13:58,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17209 conditions, 3091 events. 1768/3091 cut-off events. For 101214/101214 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 19515 event pairs, 474 based on Foata normal form. 1/3086 useless extension candidates. Maximal degree in co-relation 17113. Up to 2554 conditions per place. [2024-06-04 16:13:58,684 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 141 selfloop transitions, 88 changer transitions 0/236 dead transitions. [2024-06-04 16:13:58,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 236 transitions, 3231 flow [2024-06-04 16:13:58,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:13:58,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:13:58,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-04 16:13:58,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5474254742547425 [2024-06-04 16:13:58,685 INFO L175 Difference]: Start difference. First operand has 217 places, 219 transitions, 2613 flow. Second operand 9 states and 202 transitions. [2024-06-04 16:13:58,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 236 transitions, 3231 flow [2024-06-04 16:13:59,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 236 transitions, 3005 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-04 16:13:59,010 INFO L231 Difference]: Finished difference. Result has 219 places, 219 transitions, 2571 flow [2024-06-04 16:13:59,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2387, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2571, PETRI_PLACES=219, PETRI_TRANSITIONS=219} [2024-06-04 16:13:59,010 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 177 predicate places. [2024-06-04 16:13:59,011 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 219 transitions, 2571 flow [2024-06-04 16:13:59,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:59,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:59,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:59,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-04 16:13:59,011 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:59,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:59,011 INFO L85 PathProgramCache]: Analyzing trace with hash -777256290, now seen corresponding path program 5 times [2024-06-04 16:13:59,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:59,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452349914] [2024-06-04 16:13:59,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:59,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:59,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:59,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:59,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:59,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452349914] [2024-06-04 16:13:59,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452349914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:59,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:59,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:13:59,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476114376] [2024-06-04 16:13:59,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:59,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:13:59,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:59,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:13:59,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:13:59,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:13:59,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 219 transitions, 2571 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:59,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:59,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:13:59,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:59,603 INFO L124 PetriNetUnfolderBase]: 1773/3100 cut-off events. [2024-06-04 16:13:59,603 INFO L125 PetriNetUnfolderBase]: For 104127/104127 co-relation queries the response was YES. [2024-06-04 16:13:59,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17271 conditions, 3100 events. 1773/3100 cut-off events. For 104127/104127 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 19614 event pairs, 480 based on Foata normal form. 1/3095 useless extension candidates. Maximal degree in co-relation 17174. Up to 2624 conditions per place. [2024-06-04 16:13:59,629 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 169 selfloop transitions, 62 changer transitions 0/238 dead transitions. [2024-06-04 16:13:59,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 238 transitions, 3235 flow [2024-06-04 16:13:59,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:13:59,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:13:59,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-04 16:13:59,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551829268292683 [2024-06-04 16:13:59,631 INFO L175 Difference]: Start difference. First operand has 219 places, 219 transitions, 2571 flow. Second operand 8 states and 181 transitions. [2024-06-04 16:13:59,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 238 transitions, 3235 flow [2024-06-04 16:13:59,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 238 transitions, 3030 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-04 16:13:59,921 INFO L231 Difference]: Finished difference. Result has 219 places, 222 transitions, 2538 flow [2024-06-04 16:13:59,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2372, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2538, PETRI_PLACES=219, PETRI_TRANSITIONS=222} [2024-06-04 16:13:59,921 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 177 predicate places. [2024-06-04 16:13:59,921 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 222 transitions, 2538 flow [2024-06-04 16:13:59,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:59,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:59,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:59,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-04 16:13:59,922 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:59,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:59,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1877137926, now seen corresponding path program 6 times [2024-06-04 16:13:59,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:59,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313961801] [2024-06-04 16:13:59,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:59,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:59,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:00,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:00,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:00,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313961801] [2024-06-04 16:14:00,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313961801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:00,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:00,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:14:00,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843345490] [2024-06-04 16:14:00,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:00,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:14:00,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:00,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:14:00,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:14:00,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:14:00,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 222 transitions, 2538 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:00,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:00,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:14:00,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:00,492 INFO L124 PetriNetUnfolderBase]: 1778/3109 cut-off events. [2024-06-04 16:14:00,492 INFO L125 PetriNetUnfolderBase]: For 106807/106807 co-relation queries the response was YES. [2024-06-04 16:14:00,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17275 conditions, 3109 events. 1778/3109 cut-off events. For 106807/106807 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 19653 event pairs, 482 based on Foata normal form. 1/3104 useless extension candidates. Maximal degree in co-relation 17177. Up to 2630 conditions per place. [2024-06-04 16:14:00,519 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 172 selfloop transitions, 60 changer transitions 0/239 dead transitions. [2024-06-04 16:14:00,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 239 transitions, 3202 flow [2024-06-04 16:14:00,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:14:00,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:14:00,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-04 16:14:00,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-04 16:14:00,520 INFO L175 Difference]: Start difference. First operand has 219 places, 222 transitions, 2538 flow. Second operand 6 states and 144 transitions. [2024-06-04 16:14:00,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 239 transitions, 3202 flow [2024-06-04 16:14:00,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 239 transitions, 2919 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-04 16:14:00,997 INFO L231 Difference]: Finished difference. Result has 217 places, 225 transitions, 2423 flow [2024-06-04 16:14:00,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2267, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2423, PETRI_PLACES=217, PETRI_TRANSITIONS=225} [2024-06-04 16:14:00,998 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 175 predicate places. [2024-06-04 16:14:00,998 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 225 transitions, 2423 flow [2024-06-04 16:14:00,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:01,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:01,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:01,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-04 16:14:01,001 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:01,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:01,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1876781736, now seen corresponding path program 7 times [2024-06-04 16:14:01,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:01,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866341864] [2024-06-04 16:14:01,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:01,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:01,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:01,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:01,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:01,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866341864] [2024-06-04 16:14:01,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866341864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:01,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:01,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:14:01,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521028887] [2024-06-04 16:14:01,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:01,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:14:01,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:01,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:14:01,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:14:01,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:14:01,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 225 transitions, 2423 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:01,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:01,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:14:01,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:01,575 INFO L124 PetriNetUnfolderBase]: 1775/3105 cut-off events. [2024-06-04 16:14:01,575 INFO L125 PetriNetUnfolderBase]: For 106536/106536 co-relation queries the response was YES. [2024-06-04 16:14:01,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17137 conditions, 3105 events. 1775/3105 cut-off events. For 106536/106536 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 19667 event pairs, 482 based on Foata normal form. 1/3100 useless extension candidates. Maximal degree in co-relation 17038. Up to 2627 conditions per place. [2024-06-04 16:14:01,601 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 173 selfloop transitions, 61 changer transitions 0/241 dead transitions. [2024-06-04 16:14:01,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 241 transitions, 2931 flow [2024-06-04 16:14:01,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:14:01,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:14:01,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-04 16:14:01,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-04 16:14:01,602 INFO L175 Difference]: Start difference. First operand has 217 places, 225 transitions, 2423 flow. Second operand 6 states and 146 transitions. [2024-06-04 16:14:01,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 241 transitions, 2931 flow [2024-06-04 16:14:02,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 241 transitions, 2789 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-04 16:14:02,046 INFO L231 Difference]: Finished difference. Result has 219 places, 225 transitions, 2410 flow [2024-06-04 16:14:02,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2281, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2410, PETRI_PLACES=219, PETRI_TRANSITIONS=225} [2024-06-04 16:14:02,046 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 177 predicate places. [2024-06-04 16:14:02,047 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 225 transitions, 2410 flow [2024-06-04 16:14:02,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:02,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:02,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:02,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-04 16:14:02,047 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:02,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:02,048 INFO L85 PathProgramCache]: Analyzing trace with hash 683711170, now seen corresponding path program 1 times [2024-06-04 16:14:02,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:02,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601217840] [2024-06-04 16:14:02,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:02,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:02,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:02,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:02,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:02,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601217840] [2024-06-04 16:14:02,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601217840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:02,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:02,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:14:02,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217886286] [2024-06-04 16:14:02,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:02,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:14:02,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:02,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:14:02,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:14:02,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:14:02,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 225 transitions, 2410 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:02,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:02,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:14:02,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:02,639 INFO L124 PetriNetUnfolderBase]: 1762/3080 cut-off events. [2024-06-04 16:14:02,640 INFO L125 PetriNetUnfolderBase]: For 107356/107356 co-relation queries the response was YES. [2024-06-04 16:14:02,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16712 conditions, 3080 events. 1762/3080 cut-off events. For 107356/107356 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 19363 event pairs, 357 based on Foata normal form. 6/3080 useless extension candidates. Maximal degree in co-relation 16612. Up to 2531 conditions per place. [2024-06-04 16:14:02,665 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 216 selfloop transitions, 21 changer transitions 1/245 dead transitions. [2024-06-04 16:14:02,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 245 transitions, 2978 flow [2024-06-04 16:14:02,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:14:02,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:14:02,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-04 16:14:02,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-04 16:14:02,666 INFO L175 Difference]: Start difference. First operand has 219 places, 225 transitions, 2410 flow. Second operand 5 states and 125 transitions. [2024-06-04 16:14:02,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 245 transitions, 2978 flow [2024-06-04 16:14:03,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 245 transitions, 2809 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-04 16:14:03,051 INFO L231 Difference]: Finished difference. Result has 218 places, 225 transitions, 2288 flow [2024-06-04 16:14:03,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2241, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2288, PETRI_PLACES=218, PETRI_TRANSITIONS=225} [2024-06-04 16:14:03,052 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 176 predicate places. [2024-06-04 16:14:03,052 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 225 transitions, 2288 flow [2024-06-04 16:14:03,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:03,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:03,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:03,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-04 16:14:03,053 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:03,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:03,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1389236506, now seen corresponding path program 1 times [2024-06-04 16:14:03,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:03,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797499907] [2024-06-04 16:14:03,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:03,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:03,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:03,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:03,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:03,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797499907] [2024-06-04 16:14:03,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797499907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:03,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:03,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:14:03,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931628107] [2024-06-04 16:14:03,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:03,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:14:03,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:03,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:14:03,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:14:03,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:14:03,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 225 transitions, 2288 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:03,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:03,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:14:03,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:03,705 INFO L124 PetriNetUnfolderBase]: 1782/3133 cut-off events. [2024-06-04 16:14:03,705 INFO L125 PetriNetUnfolderBase]: For 110492/110492 co-relation queries the response was YES. [2024-06-04 16:14:03,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16873 conditions, 3133 events. 1782/3133 cut-off events. For 110492/110492 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 19907 event pairs, 329 based on Foata normal form. 6/3134 useless extension candidates. Maximal degree in co-relation 16772. Up to 2200 conditions per place. [2024-06-04 16:14:03,730 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 194 selfloop transitions, 67 changer transitions 1/269 dead transitions. [2024-06-04 16:14:03,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 269 transitions, 3021 flow [2024-06-04 16:14:03,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:14:03,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:14:03,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-04 16:14:03,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6310975609756098 [2024-06-04 16:14:03,731 INFO L175 Difference]: Start difference. First operand has 218 places, 225 transitions, 2288 flow. Second operand 8 states and 207 transitions. [2024-06-04 16:14:03,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 269 transitions, 3021 flow [2024-06-04 16:14:04,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 269 transitions, 2962 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-04 16:14:04,129 INFO L231 Difference]: Finished difference. Result has 223 places, 228 transitions, 2443 flow [2024-06-04 16:14:04,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2232, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2443, PETRI_PLACES=223, PETRI_TRANSITIONS=228} [2024-06-04 16:14:04,130 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 181 predicate places. [2024-06-04 16:14:04,130 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 228 transitions, 2443 flow [2024-06-04 16:14:04,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:04,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:04,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:04,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-04 16:14:04,130 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:04,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:04,131 INFO L85 PathProgramCache]: Analyzing trace with hash -925874236, now seen corresponding path program 2 times [2024-06-04 16:14:04,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:04,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058833148] [2024-06-04 16:14:04,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:04,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:04,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:04,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:04,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:04,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058833148] [2024-06-04 16:14:04,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058833148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:04,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:04,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:14:04,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291878205] [2024-06-04 16:14:04,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:04,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:14:04,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:04,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:14:04,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:14:04,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:14:04,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 228 transitions, 2443 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:04,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:04,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:14:04,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:04,854 INFO L124 PetriNetUnfolderBase]: 1903/3345 cut-off events. [2024-06-04 16:14:04,854 INFO L125 PetriNetUnfolderBase]: For 153688/153688 co-relation queries the response was YES. [2024-06-04 16:14:04,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19290 conditions, 3345 events. 1903/3345 cut-off events. For 153688/153688 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 21474 event pairs, 290 based on Foata normal form. 6/3345 useless extension candidates. Maximal degree in co-relation 19187. Up to 1768 conditions per place. [2024-06-04 16:14:04,886 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 193 selfloop transitions, 67 changer transitions 0/267 dead transitions. [2024-06-04 16:14:04,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 267 transitions, 3309 flow [2024-06-04 16:14:04,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:14:04,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:14:04,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-04 16:14:04,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306620209059234 [2024-06-04 16:14:04,888 INFO L175 Difference]: Start difference. First operand has 223 places, 228 transitions, 2443 flow. Second operand 7 states and 181 transitions. [2024-06-04 16:14:04,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 267 transitions, 3309 flow [2024-06-04 16:14:05,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 267 transitions, 3219 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-04 16:14:05,449 INFO L231 Difference]: Finished difference. Result has 226 places, 232 transitions, 2587 flow [2024-06-04 16:14:05,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2355, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2587, PETRI_PLACES=226, PETRI_TRANSITIONS=232} [2024-06-04 16:14:05,449 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 184 predicate places. [2024-06-04 16:14:05,449 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 232 transitions, 2587 flow [2024-06-04 16:14:05,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:05,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:05,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:05,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-04 16:14:05,449 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)] === [2024-06-04 16:14:05,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:05,450 INFO L85 PathProgramCache]: Analyzing trace with hash -932540476, now seen corresponding path program 3 times [2024-06-04 16:14:05,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:05,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462664165] [2024-06-04 16:14:05,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:05,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:05,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:05,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:05,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:05,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462664165] [2024-06-04 16:14:05,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462664165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:05,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:05,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:14:05,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70099412] [2024-06-04 16:14:05,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:05,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:14:05,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:05,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:14:05,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:14:05,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:14:05,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 232 transitions, 2587 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:05,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:05,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:14:05,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:06,134 INFO L124 PetriNetUnfolderBase]: 1890/3320 cut-off events. [2024-06-04 16:14:06,134 INFO L125 PetriNetUnfolderBase]: For 142666/142666 co-relation queries the response was YES. [2024-06-04 16:14:06,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19348 conditions, 3320 events. 1890/3320 cut-off events. For 142666/142666 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 21249 event pairs, 329 based on Foata normal form. 6/3320 useless extension candidates. Maximal degree in co-relation 19243. Up to 1762 conditions per place. [2024-06-04 16:14:06,163 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 189 selfloop transitions, 70 changer transitions 0/266 dead transitions. [2024-06-04 16:14:06,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 266 transitions, 3401 flow [2024-06-04 16:14:06,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:14:06,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:14:06,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-04 16:14:06,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627177700348432 [2024-06-04 16:14:06,168 INFO L175 Difference]: Start difference. First operand has 226 places, 232 transitions, 2587 flow. Second operand 7 states and 180 transitions. [2024-06-04 16:14:06,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 266 transitions, 3401 flow [2024-06-04 16:14:06,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 266 transitions, 3307 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-04 16:14:06,805 INFO L231 Difference]: Finished difference. Result has 230 places, 232 transitions, 2637 flow [2024-06-04 16:14:06,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2493, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2637, PETRI_PLACES=230, PETRI_TRANSITIONS=232} [2024-06-04 16:14:06,806 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-04 16:14:06,806 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 232 transitions, 2637 flow [2024-06-04 16:14:06,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:06,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:06,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:06,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-04 16:14:06,806 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:06,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:06,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1931025561, now seen corresponding path program 1 times [2024-06-04 16:14:06,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:06,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438804236] [2024-06-04 16:14:06,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:06,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:06,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:07,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:07,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:07,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438804236] [2024-06-04 16:14:07,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438804236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:07,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:07,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:14:07,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308514827] [2024-06-04 16:14:07,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:07,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:14:07,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:07,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:14:07,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:14:07,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:14:07,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 232 transitions, 2637 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:07,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:07,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:14:07,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:07,581 INFO L124 PetriNetUnfolderBase]: 1989/3487 cut-off events. [2024-06-04 16:14:07,582 INFO L125 PetriNetUnfolderBase]: For 180740/180740 co-relation queries the response was YES. [2024-06-04 16:14:07,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21572 conditions, 3487 events. 1989/3487 cut-off events. For 180740/180740 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 22446 event pairs, 418 based on Foata normal form. 6/3487 useless extension candidates. Maximal degree in co-relation 21466. Up to 2594 conditions per place. [2024-06-04 16:14:07,614 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 240 selfloop transitions, 35 changer transitions 4/286 dead transitions. [2024-06-04 16:14:07,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 286 transitions, 3747 flow [2024-06-04 16:14:07,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:14:07,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:14:07,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 240 transitions. [2024-06-04 16:14:07,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-04 16:14:07,615 INFO L175 Difference]: Start difference. First operand has 230 places, 232 transitions, 2637 flow. Second operand 10 states and 240 transitions. [2024-06-04 16:14:07,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 286 transitions, 3747 flow [2024-06-04 16:14:08,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 286 transitions, 3527 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-04 16:14:08,349 INFO L231 Difference]: Finished difference. Result has 233 places, 235 transitions, 2571 flow [2024-06-04 16:14:08,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2417, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2571, PETRI_PLACES=233, PETRI_TRANSITIONS=235} [2024-06-04 16:14:08,350 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 191 predicate places. [2024-06-04 16:14:08,350 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 235 transitions, 2571 flow [2024-06-04 16:14:08,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:08,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:08,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:08,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-04 16:14:08,351 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:08,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:08,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1204149283, now seen corresponding path program 2 times [2024-06-04 16:14:08,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:08,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19748819] [2024-06-04 16:14:08,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:08,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:08,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:08,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:08,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:08,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19748819] [2024-06-04 16:14:08,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19748819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:08,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:08,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:14:08,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523162443] [2024-06-04 16:14:08,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:08,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:14:08,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:08,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:14:08,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:14:08,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:14:08,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 235 transitions, 2571 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:08,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:08,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:14:08,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:09,072 INFO L124 PetriNetUnfolderBase]: 1895/3334 cut-off events. [2024-06-04 16:14:09,072 INFO L125 PetriNetUnfolderBase]: For 127788/127788 co-relation queries the response was YES. [2024-06-04 16:14:09,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18703 conditions, 3334 events. 1895/3334 cut-off events. For 127788/127788 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 21407 event pairs, 391 based on Foata normal form. 6/3337 useless extension candidates. Maximal degree in co-relation 18598. Up to 2655 conditions per place. [2024-06-04 16:14:09,101 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 234 selfloop transitions, 27 changer transitions 4/272 dead transitions. [2024-06-04 16:14:09,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 272 transitions, 3229 flow [2024-06-04 16:14:09,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:14:09,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:14:09,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-04 16:14:09,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-04 16:14:09,101 INFO L175 Difference]: Start difference. First operand has 233 places, 235 transitions, 2571 flow. Second operand 7 states and 177 transitions. [2024-06-04 16:14:09,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 272 transitions, 3229 flow [2024-06-04 16:14:09,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 272 transitions, 3155 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-04 16:14:09,702 INFO L231 Difference]: Finished difference. Result has 235 places, 235 transitions, 2558 flow [2024-06-04 16:14:09,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2497, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2558, PETRI_PLACES=235, PETRI_TRANSITIONS=235} [2024-06-04 16:14:09,702 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-04 16:14:09,703 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 235 transitions, 2558 flow [2024-06-04 16:14:09,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:09,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:09,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:09,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-04 16:14:09,703 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:09,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:09,703 INFO L85 PathProgramCache]: Analyzing trace with hash -350041053, now seen corresponding path program 3 times [2024-06-04 16:14:09,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:09,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443613448] [2024-06-04 16:14:09,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:09,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:09,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:09,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:09,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:09,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443613448] [2024-06-04 16:14:09,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443613448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:09,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:09,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:14:09,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179067262] [2024-06-04 16:14:09,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:09,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:14:09,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:09,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:14:09,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:14:09,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:14:09,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 235 transitions, 2558 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:09,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:09,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:14:09,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:10,453 INFO L124 PetriNetUnfolderBase]: 1923/3368 cut-off events. [2024-06-04 16:14:10,453 INFO L125 PetriNetUnfolderBase]: For 136964/136964 co-relation queries the response was YES. [2024-06-04 16:14:10,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18917 conditions, 3368 events. 1923/3368 cut-off events. For 136964/136964 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 21589 event pairs, 497 based on Foata normal form. 8/3371 useless extension candidates. Maximal degree in co-relation 18810. Up to 2780 conditions per place. [2024-06-04 16:14:10,483 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 240 selfloop transitions, 28 changer transitions 0/275 dead transitions. [2024-06-04 16:14:10,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 275 transitions, 3408 flow [2024-06-04 16:14:10,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:14:10,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:14:10,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-04 16:14:10,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5945121951219512 [2024-06-04 16:14:10,484 INFO L175 Difference]: Start difference. First operand has 235 places, 235 transitions, 2558 flow. Second operand 8 states and 195 transitions. [2024-06-04 16:14:10,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 275 transitions, 3408 flow [2024-06-04 16:14:11,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 275 transitions, 3354 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-04 16:14:11,060 INFO L231 Difference]: Finished difference. Result has 237 places, 236 transitions, 2586 flow [2024-06-04 16:14:11,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2504, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2586, PETRI_PLACES=237, PETRI_TRANSITIONS=236} [2024-06-04 16:14:11,060 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 195 predicate places. [2024-06-04 16:14:11,060 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 236 transitions, 2586 flow [2024-06-04 16:14:11,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:11,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:11,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:11,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-04 16:14:11,060 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:11,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:11,061 INFO L85 PathProgramCache]: Analyzing trace with hash 510218267, now seen corresponding path program 4 times [2024-06-04 16:14:11,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:11,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021033116] [2024-06-04 16:14:11,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:11,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:11,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:11,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:11,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:11,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021033116] [2024-06-04 16:14:11,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021033116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:11,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:11,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:14:11,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387434449] [2024-06-04 16:14:11,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:11,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:14:11,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:11,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:14:11,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:14:11,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:14:11,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 236 transitions, 2586 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:11,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:11,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:14:11,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:11,754 INFO L124 PetriNetUnfolderBase]: 1905/3344 cut-off events. [2024-06-04 16:14:11,754 INFO L125 PetriNetUnfolderBase]: For 121448/121448 co-relation queries the response was YES. [2024-06-04 16:14:11,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18246 conditions, 3344 events. 1905/3344 cut-off events. For 121448/121448 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 21493 event pairs, 507 based on Foata normal form. 8/3349 useless extension candidates. Maximal degree in co-relation 18138. Up to 2908 conditions per place. [2024-06-04 16:14:11,783 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 233 selfloop transitions, 27 changer transitions 0/267 dead transitions. [2024-06-04 16:14:11,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 267 transitions, 3212 flow [2024-06-04 16:14:11,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:14:11,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:14:11,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-04 16:14:11,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-04 16:14:11,784 INFO L175 Difference]: Start difference. First operand has 237 places, 236 transitions, 2586 flow. Second operand 8 states and 187 transitions. [2024-06-04 16:14:11,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 267 transitions, 3212 flow [2024-06-04 16:14:12,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 267 transitions, 3136 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-04 16:14:12,269 INFO L231 Difference]: Finished difference. Result has 239 places, 236 transitions, 2569 flow [2024-06-04 16:14:12,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2510, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2569, PETRI_PLACES=239, PETRI_TRANSITIONS=236} [2024-06-04 16:14:12,270 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 197 predicate places. [2024-06-04 16:14:12,270 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 236 transitions, 2569 flow [2024-06-04 16:14:12,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:12,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:12,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:12,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-04 16:14:12,271 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:12,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:12,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1726574205, now seen corresponding path program 5 times [2024-06-04 16:14:12,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:12,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950688152] [2024-06-04 16:14:12,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:12,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:12,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:12,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:12,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:12,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950688152] [2024-06-04 16:14:12,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950688152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:12,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:12,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:14:12,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580433479] [2024-06-04 16:14:12,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:12,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:14:12,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:12,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:14:12,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:14:12,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:14:12,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 236 transitions, 2569 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:12,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:12,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:14:12,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:13,082 INFO L124 PetriNetUnfolderBase]: 2106/3661 cut-off events. [2024-06-04 16:14:13,083 INFO L125 PetriNetUnfolderBase]: For 212756/212756 co-relation queries the response was YES. [2024-06-04 16:14:13,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22303 conditions, 3661 events. 2106/3661 cut-off events. For 212756/212756 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 23605 event pairs, 597 based on Foata normal form. 8/3666 useless extension candidates. Maximal degree in co-relation 22194. Up to 2687 conditions per place. [2024-06-04 16:14:13,118 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 157 selfloop transitions, 116 changer transitions 0/280 dead transitions. [2024-06-04 16:14:13,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 280 transitions, 3477 flow [2024-06-04 16:14:13,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:14:13,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:14:13,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 275 transitions. [2024-06-04 16:14:13,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5589430894308943 [2024-06-04 16:14:13,119 INFO L175 Difference]: Start difference. First operand has 239 places, 236 transitions, 2569 flow. Second operand 12 states and 275 transitions. [2024-06-04 16:14:13,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 280 transitions, 3477 flow [2024-06-04 16:14:13,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 280 transitions, 3416 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-04 16:14:13,848 INFO L231 Difference]: Finished difference. Result has 244 places, 238 transitions, 2798 flow [2024-06-04 16:14:13,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2508, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2798, PETRI_PLACES=244, PETRI_TRANSITIONS=238} [2024-06-04 16:14:13,848 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 202 predicate places. [2024-06-04 16:14:13,848 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 238 transitions, 2798 flow [2024-06-04 16:14:13,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:13,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:13,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:13,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-04 16:14:13,849 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:13,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:13,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1734192765, now seen corresponding path program 6 times [2024-06-04 16:14:13,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:13,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144244920] [2024-06-04 16:14:13,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:13,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:13,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:14,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:14,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:14,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144244920] [2024-06-04 16:14:14,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144244920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:14,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:14,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:14:14,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70245869] [2024-06-04 16:14:14,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:14,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:14:14,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:14,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:14:14,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:14:14,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:14:14,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 238 transitions, 2798 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:14,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:14,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:14:14,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:14,643 INFO L124 PetriNetUnfolderBase]: 2134/3705 cut-off events. [2024-06-04 16:14:14,643 INFO L125 PetriNetUnfolderBase]: For 220430/220430 co-relation queries the response was YES. [2024-06-04 16:14:14,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22986 conditions, 3705 events. 2134/3705 cut-off events. For 220430/220430 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 23902 event pairs, 617 based on Foata normal form. 8/3710 useless extension candidates. Maximal degree in co-relation 22876. Up to 3104 conditions per place. [2024-06-04 16:14:14,680 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 150 selfloop transitions, 114 changer transitions 0/271 dead transitions. [2024-06-04 16:14:14,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 271 transitions, 3460 flow [2024-06-04 16:14:14,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:14:14,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:14:14,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 266 transitions. [2024-06-04 16:14:14,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.540650406504065 [2024-06-04 16:14:14,681 INFO L175 Difference]: Start difference. First operand has 244 places, 238 transitions, 2798 flow. Second operand 12 states and 266 transitions. [2024-06-04 16:14:14,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 271 transitions, 3460 flow [2024-06-04 16:14:15,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 271 transitions, 3269 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-04 16:14:15,528 INFO L231 Difference]: Finished difference. Result has 248 places, 239 transitions, 2870 flow [2024-06-04 16:14:15,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2617, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2870, PETRI_PLACES=248, PETRI_TRANSITIONS=239} [2024-06-04 16:14:15,528 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 206 predicate places. [2024-06-04 16:14:15,528 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 239 transitions, 2870 flow [2024-06-04 16:14:15,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:15,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:15,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:15,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-04 16:14:15,529 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)] === [2024-06-04 16:14:15,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:15,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1639036475, now seen corresponding path program 7 times [2024-06-04 16:14:15,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:15,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494875400] [2024-06-04 16:14:15,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:15,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:15,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:15,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:15,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:15,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494875400] [2024-06-04 16:14:15,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494875400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:15,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:15,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:14:15,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060328382] [2024-06-04 16:14:15,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:15,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:14:15,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:15,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:14:15,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:14:15,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:14:15,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 239 transitions, 2870 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:15,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:15,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:14:15,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:16,284 INFO L124 PetriNetUnfolderBase]: 2162/3749 cut-off events. [2024-06-04 16:14:16,284 INFO L125 PetriNetUnfolderBase]: For 224249/224249 co-relation queries the response was YES. [2024-06-04 16:14:16,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23283 conditions, 3749 events. 2162/3749 cut-off events. For 224249/224249 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 24286 event pairs, 621 based on Foata normal form. 8/3754 useless extension candidates. Maximal degree in co-relation 23171. Up to 3148 conditions per place. [2024-06-04 16:14:16,320 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 150 selfloop transitions, 111 changer transitions 0/268 dead transitions. [2024-06-04 16:14:16,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 268 transitions, 3508 flow [2024-06-04 16:14:16,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:14:16,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:14:16,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 245 transitions. [2024-06-04 16:14:16,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5432372505543237 [2024-06-04 16:14:16,321 INFO L175 Difference]: Start difference. First operand has 248 places, 239 transitions, 2870 flow. Second operand 11 states and 245 transitions. [2024-06-04 16:14:16,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 268 transitions, 3508 flow [2024-06-04 16:14:17,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 268 transitions, 3277 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-04 16:14:17,127 INFO L231 Difference]: Finished difference. Result has 249 places, 240 transitions, 2888 flow [2024-06-04 16:14:17,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2639, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2888, PETRI_PLACES=249, PETRI_TRANSITIONS=240} [2024-06-04 16:14:17,128 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 207 predicate places. [2024-06-04 16:14:17,128 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 240 transitions, 2888 flow [2024-06-04 16:14:17,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:17,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:17,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:17,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-04 16:14:17,128 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:17,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:17,128 INFO L85 PathProgramCache]: Analyzing trace with hash -998396893, now seen corresponding path program 8 times [2024-06-04 16:14:17,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:17,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686612356] [2024-06-04 16:14:17,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:17,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:17,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:17,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:17,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:17,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686612356] [2024-06-04 16:14:17,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686612356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:17,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:17,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:14:17,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314638278] [2024-06-04 16:14:17,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:17,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:14:17,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:17,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:14:17,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:14:17,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:14:17,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 240 transitions, 2888 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:17,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:17,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:14:17,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:17,877 INFO L124 PetriNetUnfolderBase]: 2093/3648 cut-off events. [2024-06-04 16:14:17,878 INFO L125 PetriNetUnfolderBase]: For 208239/208239 co-relation queries the response was YES. [2024-06-04 16:14:17,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20347 conditions, 3648 events. 2093/3648 cut-off events. For 208239/208239 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 23699 event pairs, 559 based on Foata normal form. 34/3679 useless extension candidates. Maximal degree in co-relation 20234. Up to 2954 conditions per place. [2024-06-04 16:14:17,912 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 224 selfloop transitions, 38 changer transitions 3/272 dead transitions. [2024-06-04 16:14:17,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 272 transitions, 3536 flow [2024-06-04 16:14:17,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:14:17,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:14:17,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-04 16:14:17,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-04 16:14:17,913 INFO L175 Difference]: Start difference. First operand has 249 places, 240 transitions, 2888 flow. Second operand 7 states and 178 transitions. [2024-06-04 16:14:17,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 272 transitions, 3536 flow [2024-06-04 16:14:18,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 272 transitions, 3303 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-04 16:14:18,405 INFO L231 Difference]: Finished difference. Result has 247 places, 239 transitions, 2730 flow [2024-06-04 16:14:18,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2655, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2730, PETRI_PLACES=247, PETRI_TRANSITIONS=239} [2024-06-04 16:14:18,406 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 205 predicate places. [2024-06-04 16:14:18,406 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 239 transitions, 2730 flow [2024-06-04 16:14:18,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:18,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:18,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:18,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-04 16:14:18,406 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)] === [2024-06-04 16:14:18,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:18,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1859931823, now seen corresponding path program 1 times [2024-06-04 16:14:18,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:18,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619149606] [2024-06-04 16:14:18,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:18,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:18,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:18,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:18,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:18,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619149606] [2024-06-04 16:14:18,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619149606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:18,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:18,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:14:18,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164163134] [2024-06-04 16:14:18,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:18,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:14:18,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:18,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:14:18,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:14:18,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:14:18,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 239 transitions, 2730 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:18,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:18,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:14:18,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:19,232 INFO L124 PetriNetUnfolderBase]: 2250/3913 cut-off events. [2024-06-04 16:14:19,233 INFO L125 PetriNetUnfolderBase]: For 218702/218702 co-relation queries the response was YES. [2024-06-04 16:14:19,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23695 conditions, 3913 events. 2250/3913 cut-off events. For 218702/218702 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 25528 event pairs, 569 based on Foata normal form. 6/3908 useless extension candidates. Maximal degree in co-relation 23581. Up to 2392 conditions per place. [2024-06-04 16:14:19,269 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 156 selfloop transitions, 124 changer transitions 0/287 dead transitions. [2024-06-04 16:14:19,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 287 transitions, 3694 flow [2024-06-04 16:14:19,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:14:19,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:14:19,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 261 transitions. [2024-06-04 16:14:19,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5787139689578714 [2024-06-04 16:14:19,270 INFO L175 Difference]: Start difference. First operand has 247 places, 239 transitions, 2730 flow. Second operand 11 states and 261 transitions. [2024-06-04 16:14:19,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 287 transitions, 3694 flow [2024-06-04 16:14:20,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 287 transitions, 3601 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-04 16:14:20,094 INFO L231 Difference]: Finished difference. Result has 251 places, 241 transitions, 2949 flow [2024-06-04 16:14:20,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2639, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2949, PETRI_PLACES=251, PETRI_TRANSITIONS=241} [2024-06-04 16:14:20,094 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 209 predicate places. [2024-06-04 16:14:20,095 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 241 transitions, 2949 flow [2024-06-04 16:14:20,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:20,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:20,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:20,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-04 16:14:20,095 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:20,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:20,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1850408623, now seen corresponding path program 2 times [2024-06-04 16:14:20,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:20,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123591351] [2024-06-04 16:14:20,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:20,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:20,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:20,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:20,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:20,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123591351] [2024-06-04 16:14:20,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123591351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:20,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:20,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:14:20,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092795759] [2024-06-04 16:14:20,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:20,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:14:20,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:20,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:14:20,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:14:20,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:14:20,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 241 transitions, 2949 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:20,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:20,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:14:20,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:20,889 INFO L124 PetriNetUnfolderBase]: 2270/3938 cut-off events. [2024-06-04 16:14:20,890 INFO L125 PetriNetUnfolderBase]: For 222196/222196 co-relation queries the response was YES. [2024-06-04 16:14:20,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24253 conditions, 3938 events. 2270/3938 cut-off events. For 222196/222196 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 25737 event pairs, 631 based on Foata normal form. 6/3933 useless extension candidates. Maximal degree in co-relation 24139. Up to 2404 conditions per place. [2024-06-04 16:14:20,930 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 151 selfloop transitions, 125 changer transitions 0/283 dead transitions. [2024-06-04 16:14:20,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 283 transitions, 3857 flow [2024-06-04 16:14:20,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:14:20,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:14:20,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 256 transitions. [2024-06-04 16:14:20,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5676274944567627 [2024-06-04 16:14:20,930 INFO L175 Difference]: Start difference. First operand has 251 places, 241 transitions, 2949 flow. Second operand 11 states and 256 transitions. [2024-06-04 16:14:20,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 283 transitions, 3857 flow [2024-06-04 16:14:21,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 283 transitions, 3569 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-04 16:14:21,641 INFO L231 Difference]: Finished difference. Result has 254 places, 242 transitions, 2945 flow [2024-06-04 16:14:21,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2673, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2945, PETRI_PLACES=254, PETRI_TRANSITIONS=242} [2024-06-04 16:14:21,641 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 212 predicate places. [2024-06-04 16:14:21,641 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 242 transitions, 2945 flow [2024-06-04 16:14:21,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:21,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:21,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:21,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-04 16:14:21,642 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)] === [2024-06-04 16:14:21,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:21,643 INFO L85 PathProgramCache]: Analyzing trace with hash -382808189, now seen corresponding path program 3 times [2024-06-04 16:14:21,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:21,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414253755] [2024-06-04 16:14:21,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:21,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:21,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:21,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:21,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:21,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414253755] [2024-06-04 16:14:21,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414253755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:21,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:21,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:14:21,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132347696] [2024-06-04 16:14:21,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:21,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:14:21,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:21,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:14:21,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:14:21,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:14:21,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 242 transitions, 2945 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:21,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:21,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:14:21,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:22,432 INFO L124 PetriNetUnfolderBase]: 2290/3991 cut-off events. [2024-06-04 16:14:22,432 INFO L125 PetriNetUnfolderBase]: For 223733/223733 co-relation queries the response was YES. [2024-06-04 16:14:22,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24332 conditions, 3991 events. 2290/3991 cut-off events. For 223733/223733 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 26237 event pairs, 691 based on Foata normal form. 6/3992 useless extension candidates. Maximal degree in co-relation 24217. Up to 3270 conditions per place. [2024-06-04 16:14:22,473 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 153 selfloop transitions, 114 changer transitions 0/274 dead transitions. [2024-06-04 16:14:22,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 274 transitions, 3613 flow [2024-06-04 16:14:22,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:14:22,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:14:22,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 247 transitions. [2024-06-04 16:14:22,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476718403547672 [2024-06-04 16:14:22,474 INFO L175 Difference]: Start difference. First operand has 254 places, 242 transitions, 2945 flow. Second operand 11 states and 247 transitions. [2024-06-04 16:14:22,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 274 transitions, 3613 flow [2024-06-04 16:14:23,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 274 transitions, 3384 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-04 16:14:23,172 INFO L231 Difference]: Finished difference. Result has 257 places, 243 transitions, 2970 flow [2024-06-04 16:14:23,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2717, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2970, PETRI_PLACES=257, PETRI_TRANSITIONS=243} [2024-06-04 16:14:23,173 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 215 predicate places. [2024-06-04 16:14:23,173 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 243 transitions, 2970 flow [2024-06-04 16:14:23,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:23,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:23,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:23,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-04 16:14:23,173 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:23,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:23,174 INFO L85 PathProgramCache]: Analyzing trace with hash 286212433, now seen corresponding path program 4 times [2024-06-04 16:14:23,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:23,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750571860] [2024-06-04 16:14:23,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:23,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:23,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:23,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:23,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:23,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750571860] [2024-06-04 16:14:23,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750571860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:23,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:23,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:14:23,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34881346] [2024-06-04 16:14:23,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:23,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:14:23,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:23,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:14:23,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:14:23,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:14:23,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 243 transitions, 2970 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:23,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:23,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:14:23,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:24,014 INFO L124 PetriNetUnfolderBase]: 2231/3904 cut-off events. [2024-06-04 16:14:24,014 INFO L125 PetriNetUnfolderBase]: For 211777/211777 co-relation queries the response was YES. [2024-06-04 16:14:24,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21608 conditions, 3904 events. 2231/3904 cut-off events. For 211777/211777 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 25771 event pairs, 540 based on Foata normal form. 30/3929 useless extension candidates. Maximal degree in co-relation 21492. Up to 2823 conditions per place. [2024-06-04 16:14:24,051 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 227 selfloop transitions, 41 changer transitions 6/281 dead transitions. [2024-06-04 16:14:24,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 281 transitions, 3688 flow [2024-06-04 16:14:24,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:14:24,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:14:24,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-04 16:14:24,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-04 16:14:24,053 INFO L175 Difference]: Start difference. First operand has 257 places, 243 transitions, 2970 flow. Second operand 7 states and 182 transitions. [2024-06-04 16:14:24,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 281 transitions, 3688 flow [2024-06-04 16:14:24,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 281 transitions, 3448 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-04 16:14:24,663 INFO L231 Difference]: Finished difference. Result has 255 places, 242 transitions, 2799 flow [2024-06-04 16:14:24,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2730, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2799, PETRI_PLACES=255, PETRI_TRANSITIONS=242} [2024-06-04 16:14:24,663 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 213 predicate places. [2024-06-04 16:14:24,663 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 242 transitions, 2799 flow [2024-06-04 16:14:24,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:24,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:24,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:24,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-04 16:14:24,664 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:24,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:24,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1982326381, now seen corresponding path program 9 times [2024-06-04 16:14:24,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:24,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18100776] [2024-06-04 16:14:24,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:24,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:24,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:24,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:24,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:24,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18100776] [2024-06-04 16:14:24,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18100776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:24,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:24,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:14:24,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911469327] [2024-06-04 16:14:24,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:24,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:14:24,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:24,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:14:24,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:14:24,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:14:24,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 242 transitions, 2799 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:24,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:24,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:14:24,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:25,522 INFO L124 PetriNetUnfolderBase]: 2389/4147 cut-off events. [2024-06-04 16:14:25,522 INFO L125 PetriNetUnfolderBase]: For 250772/250772 co-relation queries the response was YES. [2024-06-04 16:14:25,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25228 conditions, 4147 events. 2389/4147 cut-off events. For 250772/250772 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 27429 event pairs, 742 based on Foata normal form. 8/4149 useless extension candidates. Maximal degree in co-relation 25111. Up to 3146 conditions per place. [2024-06-04 16:14:25,567 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 171 selfloop transitions, 105 changer transitions 0/283 dead transitions. [2024-06-04 16:14:25,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 283 transitions, 3723 flow [2024-06-04 16:14:25,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:14:25,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:14:25,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 270 transitions. [2024-06-04 16:14:25,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-04 16:14:25,568 INFO L175 Difference]: Start difference. First operand has 255 places, 242 transitions, 2799 flow. Second operand 12 states and 270 transitions. [2024-06-04 16:14:25,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 283 transitions, 3723 flow [2024-06-04 16:14:26,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 283 transitions, 3595 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-04 16:14:26,451 INFO L231 Difference]: Finished difference. Result has 259 places, 244 transitions, 2945 flow [2024-06-04 16:14:26,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2673, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2945, PETRI_PLACES=259, PETRI_TRANSITIONS=244} [2024-06-04 16:14:26,451 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 217 predicate places. [2024-06-04 16:14:26,451 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 244 transitions, 2945 flow [2024-06-04 16:14:26,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:26,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:26,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:26,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-04 16:14:26,451 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:26,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:26,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1568183261, now seen corresponding path program 10 times [2024-06-04 16:14:26,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:26,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436677881] [2024-06-04 16:14:26,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:26,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:26,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:26,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:26,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:26,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436677881] [2024-06-04 16:14:26,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436677881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:26,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:26,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:14:26,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70450906] [2024-06-04 16:14:26,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:26,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:14:26,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:26,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:14:26,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:14:26,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:14:26,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 244 transitions, 2945 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:26,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:26,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:14:26,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:27,254 INFO L124 PetriNetUnfolderBase]: 2417/4191 cut-off events. [2024-06-04 16:14:27,254 INFO L125 PetriNetUnfolderBase]: For 251890/251890 co-relation queries the response was YES. [2024-06-04 16:14:27,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25647 conditions, 4191 events. 2417/4191 cut-off events. For 251890/251890 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 27753 event pairs, 762 based on Foata normal form. 8/4193 useless extension candidates. Maximal degree in co-relation 25530. Up to 3573 conditions per place. [2024-06-04 16:14:27,367 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 164 selfloop transitions, 103 changer transitions 0/274 dead transitions. [2024-06-04 16:14:27,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 274 transitions, 3607 flow [2024-06-04 16:14:27,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:14:27,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:14:27,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 261 transitions. [2024-06-04 16:14:27,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304878048780488 [2024-06-04 16:14:27,368 INFO L175 Difference]: Start difference. First operand has 259 places, 244 transitions, 2945 flow. Second operand 12 states and 261 transitions. [2024-06-04 16:14:27,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 274 transitions, 3607 flow [2024-06-04 16:14:28,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 274 transitions, 3430 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-04 16:14:28,294 INFO L231 Difference]: Finished difference. Result has 263 places, 245 transitions, 3011 flow [2024-06-04 16:14:28,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2780, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3011, PETRI_PLACES=263, PETRI_TRANSITIONS=245} [2024-06-04 16:14:28,294 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 221 predicate places. [2024-06-04 16:14:28,294 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 245 transitions, 3011 flow [2024-06-04 16:14:28,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:28,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:28,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:28,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-04 16:14:28,295 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:28,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:28,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1006322653, now seen corresponding path program 11 times [2024-06-04 16:14:28,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:28,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229042407] [2024-06-04 16:14:28,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:28,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:28,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:28,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:28,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:28,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229042407] [2024-06-04 16:14:28,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229042407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:28,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:28,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:14:28,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664297739] [2024-06-04 16:14:28,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:28,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:14:28,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:28,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:14:28,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:14:28,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:14:28,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 245 transitions, 3011 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:28,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:28,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:14:28,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:29,104 INFO L124 PetriNetUnfolderBase]: 2445/4235 cut-off events. [2024-06-04 16:14:29,104 INFO L125 PetriNetUnfolderBase]: For 255547/255547 co-relation queries the response was YES. [2024-06-04 16:14:29,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25882 conditions, 4235 events. 2445/4235 cut-off events. For 255547/255547 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 28087 event pairs, 766 based on Foata normal form. 8/4237 useless extension candidates. Maximal degree in co-relation 25763. Up to 3617 conditions per place. [2024-06-04 16:14:29,146 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 164 selfloop transitions, 100 changer transitions 0/271 dead transitions. [2024-06-04 16:14:29,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 271 transitions, 3647 flow [2024-06-04 16:14:29,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:14:29,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:14:29,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 242 transitions. [2024-06-04 16:14:29,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-04 16:14:29,147 INFO L175 Difference]: Start difference. First operand has 263 places, 245 transitions, 3011 flow. Second operand 11 states and 242 transitions. [2024-06-04 16:14:29,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 271 transitions, 3647 flow [2024-06-04 16:14:30,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 271 transitions, 3438 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-04 16:14:30,390 INFO L231 Difference]: Finished difference. Result has 264 places, 246 transitions, 3029 flow [2024-06-04 16:14:30,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2802, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3029, PETRI_PLACES=264, PETRI_TRANSITIONS=246} [2024-06-04 16:14:30,391 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 222 predicate places. [2024-06-04 16:14:30,391 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 246 transitions, 3029 flow [2024-06-04 16:14:30,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:30,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:30,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:30,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-04 16:14:30,391 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)] === [2024-06-04 16:14:30,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:30,391 INFO L85 PathProgramCache]: Analyzing trace with hash 109255715, now seen corresponding path program 12 times [2024-06-04 16:14:30,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:30,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106363559] [2024-06-04 16:14:30,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:30,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:30,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:30,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:30,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:30,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106363559] [2024-06-04 16:14:30,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106363559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:30,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:30,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:14:30,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755229056] [2024-06-04 16:14:30,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:30,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:14:30,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:30,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:14:30,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:14:30,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:14:30,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 246 transitions, 3029 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:30,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:30,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:14:30,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:31,250 INFO L124 PetriNetUnfolderBase]: 2549/4407 cut-off events. [2024-06-04 16:14:31,251 INFO L125 PetriNetUnfolderBase]: For 346465/346465 co-relation queries the response was YES. [2024-06-04 16:14:31,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26816 conditions, 4407 events. 2549/4407 cut-off events. For 346465/346465 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 29389 event pairs, 806 based on Foata normal form. 34/4435 useless extension candidates. Maximal degree in co-relation 26696. Up to 3655 conditions per place. [2024-06-04 16:14:31,295 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 170 selfloop transitions, 90 changer transitions 3/270 dead transitions. [2024-06-04 16:14:31,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 270 transitions, 3669 flow [2024-06-04 16:14:31,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:14:31,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:14:31,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 224 transitions. [2024-06-04 16:14:31,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5463414634146342 [2024-06-04 16:14:31,296 INFO L175 Difference]: Start difference. First operand has 264 places, 246 transitions, 3029 flow. Second operand 10 states and 224 transitions. [2024-06-04 16:14:31,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 270 transitions, 3669 flow [2024-06-04 16:14:32,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 270 transitions, 3464 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-04 16:14:32,385 INFO L231 Difference]: Finished difference. Result has 265 places, 246 transitions, 3023 flow [2024-06-04 16:14:32,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2824, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3023, PETRI_PLACES=265, PETRI_TRANSITIONS=246} [2024-06-04 16:14:32,386 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 223 predicate places. [2024-06-04 16:14:32,386 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 246 transitions, 3023 flow [2024-06-04 16:14:32,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:32,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:32,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:32,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-04 16:14:32,386 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:32,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:32,386 INFO L85 PathProgramCache]: Analyzing trace with hash -400042051, now seen corresponding path program 5 times [2024-06-04 16:14:32,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:32,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509042447] [2024-06-04 16:14:32,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:32,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:32,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:32,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:32,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:32,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509042447] [2024-06-04 16:14:32,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509042447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:32,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:32,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:14:32,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959935569] [2024-06-04 16:14:32,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:32,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:14:32,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:32,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:14:32,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:14:32,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:14:32,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 246 transitions, 3023 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:32,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:32,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:14:32,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:33,290 INFO L124 PetriNetUnfolderBase]: 2706/4682 cut-off events. [2024-06-04 16:14:33,290 INFO L125 PetriNetUnfolderBase]: For 362892/362892 co-relation queries the response was YES. [2024-06-04 16:14:33,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30610 conditions, 4682 events. 2706/4682 cut-off events. For 362892/362892 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 31560 event pairs, 811 based on Foata normal form. 6/4682 useless extension candidates. Maximal degree in co-relation 30489. Up to 2987 conditions per place. [2024-06-04 16:14:33,336 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 171 selfloop transitions, 114 changer transitions 0/292 dead transitions. [2024-06-04 16:14:33,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 292 transitions, 4169 flow [2024-06-04 16:14:33,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:14:33,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:14:33,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 259 transitions. [2024-06-04 16:14:33,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5742793791574279 [2024-06-04 16:14:33,337 INFO L175 Difference]: Start difference. First operand has 265 places, 246 transitions, 3023 flow. Second operand 11 states and 259 transitions. [2024-06-04 16:14:33,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 292 transitions, 4169 flow [2024-06-04 16:14:34,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 292 transitions, 3982 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-04 16:14:34,705 INFO L231 Difference]: Finished difference. Result has 268 places, 248 transitions, 3130 flow [2024-06-04 16:14:34,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2836, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3130, PETRI_PLACES=268, PETRI_TRANSITIONS=248} [2024-06-04 16:14:34,705 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 226 predicate places. [2024-06-04 16:14:34,705 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 248 transitions, 3130 flow [2024-06-04 16:14:34,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:34,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:34,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:34,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-04 16:14:34,706 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)] === [2024-06-04 16:14:34,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:34,706 INFO L85 PathProgramCache]: Analyzing trace with hash 549777283, now seen corresponding path program 6 times [2024-06-04 16:14:34,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:34,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980290034] [2024-06-04 16:14:34,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:34,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:34,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:34,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:34,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:34,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980290034] [2024-06-04 16:14:34,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980290034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:34,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:34,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:14:34,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531639858] [2024-06-04 16:14:34,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:34,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:14:34,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:34,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:14:34,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:14:34,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:14:34,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 248 transitions, 3130 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:34,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:34,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:14:34,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:35,618 INFO L124 PetriNetUnfolderBase]: 2726/4712 cut-off events. [2024-06-04 16:14:35,618 INFO L125 PetriNetUnfolderBase]: For 374152/374152 co-relation queries the response was YES. [2024-06-04 16:14:35,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31136 conditions, 4712 events. 2726/4712 cut-off events. For 374152/374152 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 31772 event pairs, 889 based on Foata normal form. 6/4712 useless extension candidates. Maximal degree in co-relation 31014. Up to 2999 conditions per place. [2024-06-04 16:14:35,666 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 167 selfloop transitions, 113 changer transitions 0/287 dead transitions. [2024-06-04 16:14:35,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 287 transitions, 4054 flow [2024-06-04 16:14:35,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:14:35,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:14:35,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 253 transitions. [2024-06-04 16:14:35,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-04 16:14:35,667 INFO L175 Difference]: Start difference. First operand has 268 places, 248 transitions, 3130 flow. Second operand 11 states and 253 transitions. [2024-06-04 16:14:35,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 287 transitions, 4054 flow [2024-06-04 16:14:37,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 287 transitions, 3783 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-04 16:14:37,028 INFO L231 Difference]: Finished difference. Result has 271 places, 249 transitions, 3121 flow [2024-06-04 16:14:37,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2873, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3121, PETRI_PLACES=271, PETRI_TRANSITIONS=249} [2024-06-04 16:14:37,028 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 229 predicate places. [2024-06-04 16:14:37,028 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 249 transitions, 3121 flow [2024-06-04 16:14:37,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:37,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:37,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:37,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-04 16:14:37,029 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:37,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:37,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1970066149, now seen corresponding path program 7 times [2024-06-04 16:14:37,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:37,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338748506] [2024-06-04 16:14:37,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:37,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:37,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:37,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:37,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:37,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338748506] [2024-06-04 16:14:37,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338748506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:37,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:37,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:14:37,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825214666] [2024-06-04 16:14:37,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:37,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:14:37,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:37,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:14:37,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:14:37,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:14:37,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 249 transitions, 3121 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:37,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:37,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:14:37,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:37,951 INFO L124 PetriNetUnfolderBase]: 2746/4754 cut-off events. [2024-06-04 16:14:37,951 INFO L125 PetriNetUnfolderBase]: For 378442/378442 co-relation queries the response was YES. [2024-06-04 16:14:37,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31166 conditions, 4754 events. 2746/4754 cut-off events. For 378442/378442 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 32245 event pairs, 927 based on Foata normal form. 6/4754 useless extension candidates. Maximal degree in co-relation 31043. Up to 4046 conditions per place. [2024-06-04 16:14:38,018 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 169 selfloop transitions, 102 changer transitions 0/278 dead transitions. [2024-06-04 16:14:38,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 278 transitions, 3789 flow [2024-06-04 16:14:38,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:14:38,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:14:38,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 244 transitions. [2024-06-04 16:14:38,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.541019955654102 [2024-06-04 16:14:38,019 INFO L175 Difference]: Start difference. First operand has 271 places, 249 transitions, 3121 flow. Second operand 11 states and 244 transitions. [2024-06-04 16:14:38,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 278 transitions, 3789 flow [2024-06-04 16:14:39,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 278 transitions, 3584 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-04 16:14:39,085 INFO L231 Difference]: Finished difference. Result has 274 places, 250 transitions, 3146 flow [2024-06-04 16:14:39,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2917, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3146, PETRI_PLACES=274, PETRI_TRANSITIONS=250} [2024-06-04 16:14:39,085 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 232 predicate places. [2024-06-04 16:14:39,085 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 250 transitions, 3146 flow [2024-06-04 16:14:39,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:39,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:39,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:39,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-04 16:14:39,086 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:39,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:39,086 INFO L85 PathProgramCache]: Analyzing trace with hash -151880673, now seen corresponding path program 8 times [2024-06-04 16:14:39,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:39,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246809473] [2024-06-04 16:14:39,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:39,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:39,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:39,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:39,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:39,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246809473] [2024-06-04 16:14:39,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246809473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:39,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:39,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:14:39,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398125706] [2024-06-04 16:14:39,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:39,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:14:39,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:39,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:14:39,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:14:39,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:14:39,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 250 transitions, 3146 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:39,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:39,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:14:39,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:40,070 INFO L124 PetriNetUnfolderBase]: 2994/5202 cut-off events. [2024-06-04 16:14:40,071 INFO L125 PetriNetUnfolderBase]: For 558041/558041 co-relation queries the response was YES. [2024-06-04 16:14:40,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37048 conditions, 5202 events. 2994/5202 cut-off events. For 558041/558041 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 35945 event pairs, 954 based on Foata normal form. 6/5202 useless extension candidates. Maximal degree in co-relation 36924. Up to 3033 conditions per place. [2024-06-04 16:14:40,130 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 185 selfloop transitions, 106 changer transitions 0/298 dead transitions. [2024-06-04 16:14:40,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 298 transitions, 4320 flow [2024-06-04 16:14:40,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:14:40,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:14:40,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 243 transitions. [2024-06-04 16:14:40,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5926829268292683 [2024-06-04 16:14:40,131 INFO L175 Difference]: Start difference. First operand has 274 places, 250 transitions, 3146 flow. Second operand 10 states and 243 transitions. [2024-06-04 16:14:40,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 298 transitions, 4320 flow [2024-06-04 16:14:41,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 298 transitions, 4110 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-04 16:14:41,776 INFO L231 Difference]: Finished difference. Result has 275 places, 251 transitions, 3182 flow [2024-06-04 16:14:41,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2936, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3182, PETRI_PLACES=275, PETRI_TRANSITIONS=251} [2024-06-04 16:14:41,776 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 233 predicate places. [2024-06-04 16:14:41,776 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 251 transitions, 3182 flow [2024-06-04 16:14:41,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:41,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:41,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:41,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-04 16:14:41,776 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:41,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:41,777 INFO L85 PathProgramCache]: Analyzing trace with hash 240703931, now seen corresponding path program 9 times [2024-06-04 16:14:41,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:41,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605422616] [2024-06-04 16:14:41,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:41,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:41,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:41,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:41,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:41,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605422616] [2024-06-04 16:14:41,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605422616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:41,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:41,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:14:41,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052027400] [2024-06-04 16:14:41,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:41,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:14:41,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:41,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:14:41,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:14:42,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:14:42,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 251 transitions, 3182 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:42,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:42,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:14:42,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:42,742 INFO L124 PetriNetUnfolderBase]: 3014/5238 cut-off events. [2024-06-04 16:14:42,742 INFO L125 PetriNetUnfolderBase]: For 572915/572915 co-relation queries the response was YES. [2024-06-04 16:14:42,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37586 conditions, 5238 events. 3014/5238 cut-off events. For 572915/572915 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 36237 event pairs, 954 based on Foata normal form. 6/5238 useless extension candidates. Maximal degree in co-relation 37461. Up to 3045 conditions per place. [2024-06-04 16:14:42,797 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 184 selfloop transitions, 104 changer transitions 0/295 dead transitions. [2024-06-04 16:14:42,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 295 transitions, 4330 flow [2024-06-04 16:14:42,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:14:42,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:14:42,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 239 transitions. [2024-06-04 16:14:42,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5829268292682926 [2024-06-04 16:14:42,798 INFO L175 Difference]: Start difference. First operand has 275 places, 251 transitions, 3182 flow. Second operand 10 states and 239 transitions. [2024-06-04 16:14:42,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 295 transitions, 4330 flow [2024-06-04 16:14:44,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 295 transitions, 3850 flow, removed 25 selfloop flow, removed 14 redundant places. [2024-06-04 16:14:44,590 INFO L231 Difference]: Finished difference. Result has 271 places, 252 transitions, 2946 flow [2024-06-04 16:14:44,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2717, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2946, PETRI_PLACES=271, PETRI_TRANSITIONS=252} [2024-06-04 16:14:44,590 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 229 predicate places. [2024-06-04 16:14:44,590 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 252 transitions, 2946 flow [2024-06-04 16:14:44,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:44,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:44,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:44,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-04 16:14:44,590 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:44,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:44,591 INFO L85 PathProgramCache]: Analyzing trace with hash 219343707, now seen corresponding path program 10 times [2024-06-04 16:14:44,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:44,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707939443] [2024-06-04 16:14:44,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:44,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:44,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:44,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:44,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:44,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707939443] [2024-06-04 16:14:44,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707939443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:44,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:44,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:14:44,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621416339] [2024-06-04 16:14:44,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:44,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:14:44,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:44,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:14:44,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:14:44,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:14:44,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 252 transitions, 2946 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:44,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:44,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:14:44,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:45,596 INFO L124 PetriNetUnfolderBase]: 3196/5544 cut-off events. [2024-06-04 16:14:45,596 INFO L125 PetriNetUnfolderBase]: For 739305/739305 co-relation queries the response was YES. [2024-06-04 16:14:45,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39657 conditions, 5544 events. 3196/5544 cut-off events. For 739305/739305 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 38930 event pairs, 989 based on Foata normal form. 24/5562 useless extension candidates. Maximal degree in co-relation 39538. Up to 3080 conditions per place. [2024-06-04 16:14:45,653 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 184 selfloop transitions, 98 changer transitions 6/295 dead transitions. [2024-06-04 16:14:45,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 295 transitions, 4089 flow [2024-06-04 16:14:45,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:14:45,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:14:45,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 238 transitions. [2024-06-04 16:14:45,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5804878048780487 [2024-06-04 16:14:45,654 INFO L175 Difference]: Start difference. First operand has 271 places, 252 transitions, 2946 flow. Second operand 10 states and 238 transitions. [2024-06-04 16:14:45,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 295 transitions, 4089 flow [2024-06-04 16:14:46,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 295 transitions, 3890 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-04 16:14:46,886 INFO L231 Difference]: Finished difference. Result has 274 places, 251 transitions, 2953 flow [2024-06-04 16:14:46,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2748, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2953, PETRI_PLACES=274, PETRI_TRANSITIONS=251} [2024-06-04 16:14:46,887 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 232 predicate places. [2024-06-04 16:14:46,887 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 251 transitions, 2953 flow [2024-06-04 16:14:46,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:46,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:46,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:46,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-04 16:14:46,887 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:46,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:46,887 INFO L85 PathProgramCache]: Analyzing trace with hash -237391997, now seen corresponding path program 11 times [2024-06-04 16:14:46,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:46,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565125866] [2024-06-04 16:14:46,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:46,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:46,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:47,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:47,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:47,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565125866] [2024-06-04 16:14:47,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565125866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:47,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:47,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:14:47,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547212243] [2024-06-04 16:14:47,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:47,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:14:47,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:47,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:14:47,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:14:47,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:14:47,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 251 transitions, 2953 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:47,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:47,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:14:47,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:47,965 INFO L124 PetriNetUnfolderBase]: 3466/6036 cut-off events. [2024-06-04 16:14:47,965 INFO L125 PetriNetUnfolderBase]: For 986576/986576 co-relation queries the response was YES. [2024-06-04 16:14:48,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46812 conditions, 6036 events. 3466/6036 cut-off events. For 986576/986576 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 43359 event pairs, 1375 based on Foata normal form. 30/6060 useless extension candidates. Maximal degree in co-relation 46692. Up to 3910 conditions per place. [2024-06-04 16:14:48,027 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 183 selfloop transitions, 88 changer transitions 9/287 dead transitions. [2024-06-04 16:14:48,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 287 transitions, 3909 flow [2024-06-04 16:14:48,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:14:48,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:14:48,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 232 transitions. [2024-06-04 16:14:48,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5658536585365853 [2024-06-04 16:14:48,028 INFO L175 Difference]: Start difference. First operand has 274 places, 251 transitions, 2953 flow. Second operand 10 states and 232 transitions. [2024-06-04 16:14:48,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 287 transitions, 3909 flow [2024-06-04 16:14:49,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 287 transitions, 3703 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-04 16:14:49,692 INFO L231 Difference]: Finished difference. Result has 276 places, 249 transitions, 2921 flow [2024-06-04 16:14:49,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2747, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2921, PETRI_PLACES=276, PETRI_TRANSITIONS=249} [2024-06-04 16:14:49,692 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 234 predicate places. [2024-06-04 16:14:49,693 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 249 transitions, 2921 flow [2024-06-04 16:14:49,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:49,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:49,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:49,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-04 16:14:49,693 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:49,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:49,693 INFO L85 PathProgramCache]: Analyzing trace with hash 43911611, now seen corresponding path program 12 times [2024-06-04 16:14:49,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:49,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525521853] [2024-06-04 16:14:49,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:49,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:49,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:49,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:49,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:49,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525521853] [2024-06-04 16:14:49,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525521853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:49,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:49,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:14:49,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71292740] [2024-06-04 16:14:49,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:49,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:14:49,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:49,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:14:49,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:14:49,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:14:49,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 249 transitions, 2921 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:49,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:49,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:14:49,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:50,768 INFO L124 PetriNetUnfolderBase]: 3043/5277 cut-off events. [2024-06-04 16:14:50,768 INFO L125 PetriNetUnfolderBase]: For 707366/707366 co-relation queries the response was YES. [2024-06-04 16:14:50,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37051 conditions, 5277 events. 3043/5277 cut-off events. For 707366/707366 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 36692 event pairs, 1082 based on Foata normal form. 30/5301 useless extension candidates. Maximal degree in co-relation 36930. Up to 4297 conditions per place. [2024-06-04 16:14:50,820 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 174 selfloop transitions, 90 changer transitions 8/279 dead transitions. [2024-06-04 16:14:50,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 279 transitions, 3629 flow [2024-06-04 16:14:50,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:14:50,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:14:50,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 229 transitions. [2024-06-04 16:14:50,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5585365853658537 [2024-06-04 16:14:50,821 INFO L175 Difference]: Start difference. First operand has 276 places, 249 transitions, 2921 flow. Second operand 10 states and 229 transitions. [2024-06-04 16:14:50,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 279 transitions, 3629 flow [2024-06-04 16:14:52,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 279 transitions, 3437 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-04 16:14:52,877 INFO L231 Difference]: Finished difference. Result has 278 places, 247 transitions, 2903 flow [2024-06-04 16:14:52,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2729, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2903, PETRI_PLACES=278, PETRI_TRANSITIONS=247} [2024-06-04 16:14:52,878 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 236 predicate places. [2024-06-04 16:14:52,878 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 247 transitions, 2903 flow [2024-06-04 16:14:52,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:52,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:52,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:52,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-04 16:14:52,878 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:52,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:52,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1521836617, now seen corresponding path program 13 times [2024-06-04 16:14:52,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:52,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116799180] [2024-06-04 16:14:52,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:52,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:52,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:53,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:53,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:53,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116799180] [2024-06-04 16:14:53,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116799180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:53,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:53,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:14:53,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768477105] [2024-06-04 16:14:53,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:53,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:14:53,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:53,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:14:53,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:14:53,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:14:53,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 247 transitions, 2903 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:53,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:53,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:14:53,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:53,766 INFO L124 PetriNetUnfolderBase]: 2656/4618 cut-off events. [2024-06-04 16:14:53,766 INFO L125 PetriNetUnfolderBase]: For 499865/499865 co-relation queries the response was YES. [2024-06-04 16:14:53,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28978 conditions, 4618 events. 2656/4618 cut-off events. For 499865/499865 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 31219 event pairs, 912 based on Foata normal form. 34/4646 useless extension candidates. Maximal degree in co-relation 28856. Up to 3816 conditions per place. [2024-06-04 16:14:53,819 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 207 selfloop transitions, 59 changer transitions 3/276 dead transitions. [2024-06-04 16:14:53,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 276 transitions, 3551 flow [2024-06-04 16:14:53,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:14:53,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:14:53,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-04 16:14:53,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-04 16:14:53,819 INFO L175 Difference]: Start difference. First operand has 278 places, 247 transitions, 2903 flow. Second operand 7 states and 177 transitions. [2024-06-04 16:14:53,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 276 transitions, 3551 flow [2024-06-04 16:14:54,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 276 transitions, 3349 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-04 16:14:54,922 INFO L231 Difference]: Finished difference. Result has 277 places, 246 transitions, 2816 flow [2024-06-04 16:14:54,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2701, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2816, PETRI_PLACES=277, PETRI_TRANSITIONS=246} [2024-06-04 16:14:54,923 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 235 predicate places. [2024-06-04 16:14:54,923 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 246 transitions, 2816 flow [2024-06-04 16:14:54,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:54,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:54,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:54,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-04 16:14:54,924 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:54,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:54,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1945662115, now seen corresponding path program 13 times [2024-06-04 16:14:54,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:54,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329526694] [2024-06-04 16:14:54,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:54,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:54,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:55,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:55,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:55,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329526694] [2024-06-04 16:14:55,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329526694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:55,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:55,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:14:55,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716277879] [2024-06-04 16:14:55,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:55,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:14:55,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:55,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:14:55,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:14:55,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:14:55,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 246 transitions, 2816 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:55,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:55,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:14:55,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:55,781 INFO L124 PetriNetUnfolderBase]: 2587/4515 cut-off events. [2024-06-04 16:14:55,781 INFO L125 PetriNetUnfolderBase]: For 371354/371354 co-relation queries the response was YES. [2024-06-04 16:14:55,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25751 conditions, 4515 events. 2587/4515 cut-off events. For 371354/371354 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 30520 event pairs, 784 based on Foata normal form. 30/4539 useless extension candidates. Maximal degree in co-relation 25628. Up to 3446 conditions per place. [2024-06-04 16:14:55,825 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 206 selfloop transitions, 60 changer transitions 8/281 dead transitions. [2024-06-04 16:14:55,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 281 transitions, 3526 flow [2024-06-04 16:14:55,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:14:55,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:14:55,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-04 16:14:55,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-04 16:14:55,826 INFO L175 Difference]: Start difference. First operand has 277 places, 246 transitions, 2816 flow. Second operand 7 states and 182 transitions. [2024-06-04 16:14:55,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 281 transitions, 3526 flow [2024-06-04 16:14:56,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 281 transitions, 3382 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-04 16:14:56,858 INFO L231 Difference]: Finished difference. Result has 277 places, 243 transitions, 2758 flow [2024-06-04 16:14:56,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2672, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2758, PETRI_PLACES=277, PETRI_TRANSITIONS=243} [2024-06-04 16:14:56,858 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 235 predicate places. [2024-06-04 16:14:56,859 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 243 transitions, 2758 flow [2024-06-04 16:14:56,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:56,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:56,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:56,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-04 16:14:56,859 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:56,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:56,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1592343203, now seen corresponding path program 14 times [2024-06-04 16:14:56,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:56,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992249952] [2024-06-04 16:14:56,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:56,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:56,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:57,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:57,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:57,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992249952] [2024-06-04 16:14:57,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992249952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:57,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:57,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:14:57,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196944540] [2024-06-04 16:14:57,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:57,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:14:57,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:57,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:14:57,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:14:57,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:14:57,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 243 transitions, 2758 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:57,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:57,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:14:57,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:57,688 INFO L124 PetriNetUnfolderBase]: 2479/4335 cut-off events. [2024-06-04 16:14:57,688 INFO L125 PetriNetUnfolderBase]: For 354905/354905 co-relation queries the response was YES. [2024-06-04 16:14:57,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24462 conditions, 4335 events. 2479/4335 cut-off events. For 354905/354905 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 29193 event pairs, 600 based on Foata normal form. 30/4359 useless extension candidates. Maximal degree in co-relation 24339. Up to 2118 conditions per place. [2024-06-04 16:14:57,731 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 201 selfloop transitions, 64 changer transitions 11/283 dead transitions. [2024-06-04 16:14:57,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 283 transitions, 3690 flow [2024-06-04 16:14:57,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:14:57,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:14:57,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-04 16:14:57,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6445993031358885 [2024-06-04 16:14:57,734 INFO L175 Difference]: Start difference. First operand has 277 places, 243 transitions, 2758 flow. Second operand 7 states and 185 transitions. [2024-06-04 16:14:57,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 283 transitions, 3690 flow [2024-06-04 16:14:58,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 283 transitions, 3511 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-04 16:14:58,694 INFO L231 Difference]: Finished difference. Result has 276 places, 238 transitions, 2660 flow [2024-06-04 16:14:58,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2581, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2660, PETRI_PLACES=276, PETRI_TRANSITIONS=238} [2024-06-04 16:14:58,695 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 234 predicate places. [2024-06-04 16:14:58,695 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 238 transitions, 2660 flow [2024-06-04 16:14:58,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:58,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:58,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:58,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-04 16:14:58,695 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:58,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:58,696 INFO L85 PathProgramCache]: Analyzing trace with hash 267750569, now seen corresponding path program 1 times [2024-06-04 16:14:58,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:58,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806486000] [2024-06-04 16:14:58,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:58,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:58,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:58,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:58,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:58,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806486000] [2024-06-04 16:14:58,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806486000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:58,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:58,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:14:58,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858720293] [2024-06-04 16:14:58,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:58,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:14:58,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:58,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:14:58,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:14:58,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:14:58,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 238 transitions, 2660 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:58,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:58,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:14:58,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:59,580 INFO L124 PetriNetUnfolderBase]: 2566/4503 cut-off events. [2024-06-04 16:14:59,580 INFO L125 PetriNetUnfolderBase]: For 481531/481531 co-relation queries the response was YES. [2024-06-04 16:14:59,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28711 conditions, 4503 events. 2566/4503 cut-off events. For 481531/481531 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 30602 event pairs, 487 based on Foata normal form. 18/4515 useless extension candidates. Maximal degree in co-relation 28588. Up to 2348 conditions per place. [2024-06-04 16:14:59,625 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 174 selfloop transitions, 85 changer transitions 15/281 dead transitions. [2024-06-04 16:14:59,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 281 transitions, 3778 flow [2024-06-04 16:14:59,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:14:59,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:14:59,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-04 16:14:59,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5989159891598916 [2024-06-04 16:14:59,626 INFO L175 Difference]: Start difference. First operand has 276 places, 238 transitions, 2660 flow. Second operand 9 states and 221 transitions. [2024-06-04 16:14:59,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 281 transitions, 3778 flow [2024-06-04 16:15:00,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 281 transitions, 3602 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-04 16:15:00,695 INFO L231 Difference]: Finished difference. Result has 277 places, 236 transitions, 2636 flow [2024-06-04 16:15:00,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2492, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2636, PETRI_PLACES=277, PETRI_TRANSITIONS=236} [2024-06-04 16:15:00,696 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 235 predicate places. [2024-06-04 16:15:00,696 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 236 transitions, 2636 flow [2024-06-04 16:15:00,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:00,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:00,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:00,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-04 16:15:00,697 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:00,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:00,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1321984157, now seen corresponding path program 2 times [2024-06-04 16:15:00,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:00,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824333321] [2024-06-04 16:15:00,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:00,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:00,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:00,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:00,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:00,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824333321] [2024-06-04 16:15:00,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824333321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:00,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:00,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:15:00,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513669072] [2024-06-04 16:15:00,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:00,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:15:00,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:00,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:15:00,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:15:01,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:01,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 236 transitions, 2636 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:01,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:01,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:01,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:01,650 INFO L124 PetriNetUnfolderBase]: 2488/4388 cut-off events. [2024-06-04 16:15:01,650 INFO L125 PetriNetUnfolderBase]: For 438537/438537 co-relation queries the response was YES. [2024-06-04 16:15:01,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27336 conditions, 4388 events. 2488/4388 cut-off events. For 438537/438537 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 29546 event pairs, 656 based on Foata normal form. 18/4400 useless extension candidates. Maximal degree in co-relation 27213. Up to 2966 conditions per place. [2024-06-04 16:15:01,696 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 227 selfloop transitions, 26 changer transitions 19/279 dead transitions. [2024-06-04 16:15:01,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 279 transitions, 3758 flow [2024-06-04 16:15:01,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:15:01,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:15:01,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-04 16:15:01,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-04 16:15:01,697 INFO L175 Difference]: Start difference. First operand has 277 places, 236 transitions, 2636 flow. Second operand 8 states and 194 transitions. [2024-06-04 16:15:01,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 279 transitions, 3758 flow [2024-06-04 16:15:02,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 279 transitions, 3576 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-04 16:15:02,698 INFO L231 Difference]: Finished difference. Result has 274 places, 232 transitions, 2477 flow [2024-06-04 16:15:02,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2462, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2477, PETRI_PLACES=274, PETRI_TRANSITIONS=232} [2024-06-04 16:15:02,698 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 232 predicate places. [2024-06-04 16:15:02,698 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 232 transitions, 2477 flow [2024-06-04 16:15:02,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:02,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:02,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:02,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-04 16:15:02,698 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:02,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:02,699 INFO L85 PathProgramCache]: Analyzing trace with hash 415360169, now seen corresponding path program 3 times [2024-06-04 16:15:02,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:02,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530519417] [2024-06-04 16:15:02,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:02,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:02,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:02,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:02,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:02,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530519417] [2024-06-04 16:15:02,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530519417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:02,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:02,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:15:02,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694379291] [2024-06-04 16:15:02,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:02,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:15:02,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:02,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:15:02,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:15:02,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:02,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 232 transitions, 2477 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:02,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:02,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:02,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:03,546 INFO L124 PetriNetUnfolderBase]: 2232/3940 cut-off events. [2024-06-04 16:15:03,546 INFO L125 PetriNetUnfolderBase]: For 258696/258696 co-relation queries the response was YES. [2024-06-04 16:15:03,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21378 conditions, 3940 events. 2232/3940 cut-off events. For 258696/258696 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 25945 event pairs, 555 based on Foata normal form. 18/3952 useless extension candidates. Maximal degree in co-relation 21256. Up to 2761 conditions per place. [2024-06-04 16:15:03,584 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 210 selfloop transitions, 20 changer transitions 27/264 dead transitions. [2024-06-04 16:15:03,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 264 transitions, 3329 flow [2024-06-04 16:15:03,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:15:03,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:15:03,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-04 16:15:03,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-04 16:15:03,585 INFO L175 Difference]: Start difference. First operand has 274 places, 232 transitions, 2477 flow. Second operand 6 states and 153 transitions. [2024-06-04 16:15:03,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 264 transitions, 3329 flow [2024-06-04 16:15:04,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 264 transitions, 3271 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-04 16:15:04,497 INFO L231 Difference]: Finished difference. Result has 271 places, 222 transitions, 2321 flow [2024-06-04 16:15:04,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2423, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2321, PETRI_PLACES=271, PETRI_TRANSITIONS=222} [2024-06-04 16:15:04,497 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 229 predicate places. [2024-06-04 16:15:04,497 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 222 transitions, 2321 flow [2024-06-04 16:15:04,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:04,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:04,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:04,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-04 16:15:04,498 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:04,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:04,498 INFO L85 PathProgramCache]: Analyzing trace with hash -519899991, now seen corresponding path program 4 times [2024-06-04 16:15:04,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:04,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229175522] [2024-06-04 16:15:04,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:04,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:04,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:04,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:04,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:04,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229175522] [2024-06-04 16:15:04,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229175522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:04,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:04,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:15:04,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893112901] [2024-06-04 16:15:04,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:04,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:15:04,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:04,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:15:04,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:15:04,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:04,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 222 transitions, 2321 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:04,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:04,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:04,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:05,325 INFO L124 PetriNetUnfolderBase]: 2196/3848 cut-off events. [2024-06-04 16:15:05,325 INFO L125 PetriNetUnfolderBase]: For 370435/370435 co-relation queries the response was YES. [2024-06-04 16:15:05,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22997 conditions, 3848 events. 2196/3848 cut-off events. For 370435/370435 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 25291 event pairs, 534 based on Foata normal form. 24/3867 useless extension candidates. Maximal degree in co-relation 22876. Up to 2432 conditions per place. [2024-06-04 16:15:05,364 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 162 selfloop transitions, 75 changer transitions 10/254 dead transitions. [2024-06-04 16:15:05,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 254 transitions, 3169 flow [2024-06-04 16:15:05,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:15:05,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:15:05,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-04 16:15:05,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5945121951219512 [2024-06-04 16:15:05,364 INFO L175 Difference]: Start difference. First operand has 271 places, 222 transitions, 2321 flow. Second operand 8 states and 195 transitions. [2024-06-04 16:15:05,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 254 transitions, 3169 flow [2024-06-04 16:15:06,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 254 transitions, 3039 flow, removed 8 selfloop flow, removed 15 redundant places. [2024-06-04 16:15:06,722 INFO L231 Difference]: Finished difference. Result has 259 places, 218 transitions, 2295 flow [2024-06-04 16:15:06,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2197, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2295, PETRI_PLACES=259, PETRI_TRANSITIONS=218} [2024-06-04 16:15:06,723 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 217 predicate places. [2024-06-04 16:15:06,723 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 218 transitions, 2295 flow [2024-06-04 16:15:06,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:06,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:06,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:06,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-04 16:15:06,723 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:06,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:06,723 INFO L85 PathProgramCache]: Analyzing trace with hash 842972375, now seen corresponding path program 5 times [2024-06-04 16:15:06,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:06,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035241196] [2024-06-04 16:15:06,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:06,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:06,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:06,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:06,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:06,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035241196] [2024-06-04 16:15:06,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035241196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:06,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:06,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:15:06,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35562660] [2024-06-04 16:15:06,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:06,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:15:06,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:06,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:15:06,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:15:06,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:06,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 218 transitions, 2295 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:06,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:06,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:06,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:07,481 INFO L124 PetriNetUnfolderBase]: 2019/3527 cut-off events. [2024-06-04 16:15:07,481 INFO L125 PetriNetUnfolderBase]: For 290138/290138 co-relation queries the response was YES. [2024-06-04 16:15:07,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20011 conditions, 3527 events. 2019/3527 cut-off events. For 290138/290138 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 22745 event pairs, 602 based on Foata normal form. 24/3546 useless extension candidates. Maximal degree in co-relation 19896. Up to 2628 conditions per place. [2024-06-04 16:15:07,515 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 174 selfloop transitions, 55 changer transitions 6/242 dead transitions. [2024-06-04 16:15:07,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 242 transitions, 3067 flow [2024-06-04 16:15:07,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:07,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:07,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-04 16:15:07,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-04 16:15:07,516 INFO L175 Difference]: Start difference. First operand has 259 places, 218 transitions, 2295 flow. Second operand 7 states and 168 transitions. [2024-06-04 16:15:07,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 242 transitions, 3067 flow [2024-06-04 16:15:08,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 242 transitions, 2892 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-04 16:15:08,364 INFO L231 Difference]: Finished difference. Result has 254 places, 215 transitions, 2215 flow [2024-06-04 16:15:08,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2124, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2215, PETRI_PLACES=254, PETRI_TRANSITIONS=215} [2024-06-04 16:15:08,364 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 212 predicate places. [2024-06-04 16:15:08,364 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 215 transitions, 2215 flow [2024-06-04 16:15:08,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:08,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:08,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:08,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-04 16:15:08,364 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:08,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:08,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1532230577, now seen corresponding path program 6 times [2024-06-04 16:15:08,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:08,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831716033] [2024-06-04 16:15:08,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:08,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:08,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:08,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:08,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:08,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831716033] [2024-06-04 16:15:08,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831716033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:08,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:08,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:15:08,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010475644] [2024-06-04 16:15:08,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:08,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:15:08,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:08,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:15:08,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:15:08,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:08,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 215 transitions, 2215 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:08,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:08,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:08,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:09,063 INFO L124 PetriNetUnfolderBase]: 1868/3280 cut-off events. [2024-06-04 16:15:09,063 INFO L125 PetriNetUnfolderBase]: For 198632/198632 co-relation queries the response was YES. [2024-06-04 16:15:09,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16551 conditions, 3280 events. 1868/3280 cut-off events. For 198632/198632 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 20965 event pairs, 571 based on Foata normal form. 26/3301 useless extension candidates. Maximal degree in co-relation 16437. Up to 2696 conditions per place. [2024-06-04 16:15:09,093 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 172 selfloop transitions, 44 changer transitions 9/232 dead transitions. [2024-06-04 16:15:09,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 232 transitions, 2743 flow [2024-06-04 16:15:09,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:09,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:09,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-04 16:15:09,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5574912891986062 [2024-06-04 16:15:09,094 INFO L175 Difference]: Start difference. First operand has 254 places, 215 transitions, 2215 flow. Second operand 7 states and 160 transitions. [2024-06-04 16:15:09,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 232 transitions, 2743 flow [2024-06-04 16:15:09,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 232 transitions, 2624 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-04 16:15:09,701 INFO L231 Difference]: Finished difference. Result has 252 places, 208 transitions, 2138 flow [2024-06-04 16:15:09,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2096, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2138, PETRI_PLACES=252, PETRI_TRANSITIONS=208} [2024-06-04 16:15:09,701 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 210 predicate places. [2024-06-04 16:15:09,702 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 208 transitions, 2138 flow [2024-06-04 16:15:09,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:09,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:09,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:09,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-04 16:15:09,702 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:09,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:09,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1572811603, now seen corresponding path program 7 times [2024-06-04 16:15:09,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:09,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047929604] [2024-06-04 16:15:09,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:09,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:09,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:09,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:09,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:09,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047929604] [2024-06-04 16:15:09,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047929604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:09,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:09,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:15:09,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330087819] [2024-06-04 16:15:09,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:09,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:15:09,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:09,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:15:09,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:15:09,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:09,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 208 transitions, 2138 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:09,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:09,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:09,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:10,426 INFO L124 PetriNetUnfolderBase]: 1955/3440 cut-off events. [2024-06-04 16:15:10,427 INFO L125 PetriNetUnfolderBase]: For 267735/267735 co-relation queries the response was YES. [2024-06-04 16:15:10,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19020 conditions, 3440 events. 1955/3440 cut-off events. For 267735/267735 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 22242 event pairs, 578 based on Foata normal form. 24/3461 useless extension candidates. Maximal degree in co-relation 18907. Up to 1843 conditions per place. [2024-06-04 16:15:10,460 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 140 selfloop transitions, 76 changer transitions 23/246 dead transitions. [2024-06-04 16:15:10,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 246 transitions, 2976 flow [2024-06-04 16:15:10,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:15:10,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:15:10,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 242 transitions. [2024-06-04 16:15:10,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-04 16:15:10,460 INFO L175 Difference]: Start difference. First operand has 252 places, 208 transitions, 2138 flow. Second operand 11 states and 242 transitions. [2024-06-04 16:15:10,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 246 transitions, 2976 flow [2024-06-04 16:15:11,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 246 transitions, 2809 flow, removed 35 selfloop flow, removed 9 redundant places. [2024-06-04 16:15:11,374 INFO L231 Difference]: Finished difference. Result has 251 places, 200 transitions, 2055 flow [2024-06-04 16:15:11,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1987, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2055, PETRI_PLACES=251, PETRI_TRANSITIONS=200} [2024-06-04 16:15:11,374 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 209 predicate places. [2024-06-04 16:15:11,374 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 200 transitions, 2055 flow [2024-06-04 16:15:11,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:11,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:11,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:11,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-04 16:15:11,375 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:11,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:11,375 INFO L85 PathProgramCache]: Analyzing trace with hash -682388181, now seen corresponding path program 1 times [2024-06-04 16:15:11,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:11,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295628864] [2024-06-04 16:15:11,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:11,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:11,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:11,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:11,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:11,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295628864] [2024-06-04 16:15:11,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295628864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:11,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:11,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:15:11,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79020384] [2024-06-04 16:15:11,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:11,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:15:11,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:11,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:15:11,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:15:11,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:11,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 200 transitions, 2055 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:11,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:11,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:11,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:12,065 INFO L124 PetriNetUnfolderBase]: 1890/3325 cut-off events. [2024-06-04 16:15:12,065 INFO L125 PetriNetUnfolderBase]: For 348539/348539 co-relation queries the response was YES. [2024-06-04 16:15:12,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19859 conditions, 3325 events. 1890/3325 cut-off events. For 348539/348539 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 21355 event pairs, 623 based on Foata normal form. 24/3346 useless extension candidates. Maximal degree in co-relation 19747. Up to 2438 conditions per place. [2024-06-04 16:15:12,098 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 139 selfloop transitions, 72 changer transitions 13/231 dead transitions. [2024-06-04 16:15:12,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 231 transitions, 2807 flow [2024-06-04 16:15:12,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:15:12,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:15:12,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 235 transitions. [2024-06-04 16:15:12,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5210643015521065 [2024-06-04 16:15:12,099 INFO L175 Difference]: Start difference. First operand has 251 places, 200 transitions, 2055 flow. Second operand 11 states and 235 transitions. [2024-06-04 16:15:12,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 231 transitions, 2807 flow [2024-06-04 16:15:12,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 231 transitions, 2640 flow, removed 18 selfloop flow, removed 11 redundant places. [2024-06-04 16:15:12,784 INFO L231 Difference]: Finished difference. Result has 245 places, 194 transitions, 1992 flow [2024-06-04 16:15:12,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1898, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1992, PETRI_PLACES=245, PETRI_TRANSITIONS=194} [2024-06-04 16:15:12,784 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 203 predicate places. [2024-06-04 16:15:12,784 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 194 transitions, 1992 flow [2024-06-04 16:15:12,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:12,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:12,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:12,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-04 16:15:12,785 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:12,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:12,785 INFO L85 PathProgramCache]: Analyzing trace with hash -682240311, now seen corresponding path program 2 times [2024-06-04 16:15:12,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:12,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321595520] [2024-06-04 16:15:12,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:12,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:12,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:12,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:12,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:12,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321595520] [2024-06-04 16:15:12,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321595520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:12,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:12,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:15:12,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512786662] [2024-06-04 16:15:12,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:12,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:15:12,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:12,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:15:12,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:15:13,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:13,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 194 transitions, 1992 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:13,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:13,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:13,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:13,442 INFO L124 PetriNetUnfolderBase]: 1707/3020 cut-off events. [2024-06-04 16:15:13,442 INFO L125 PetriNetUnfolderBase]: For 254249/254249 co-relation queries the response was YES. [2024-06-04 16:15:13,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16181 conditions, 3020 events. 1707/3020 cut-off events. For 254249/254249 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 19108 event pairs, 574 based on Foata normal form. 26/3043 useless extension candidates. Maximal degree in co-relation 16072. Up to 2438 conditions per place. [2024-06-04 16:15:13,474 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 124 selfloop transitions, 65 changer transitions 22/218 dead transitions. [2024-06-04 16:15:13,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 218 transitions, 2502 flow [2024-06-04 16:15:13,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:15:13,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:15:13,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 227 transitions. [2024-06-04 16:15:13,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5033259423503326 [2024-06-04 16:15:13,475 INFO L175 Difference]: Start difference. First operand has 245 places, 194 transitions, 1992 flow. Second operand 11 states and 227 transitions. [2024-06-04 16:15:13,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 218 transitions, 2502 flow [2024-06-04 16:15:14,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 218 transitions, 2355 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-04 16:15:14,177 INFO L231 Difference]: Finished difference. Result has 242 places, 185 transitions, 1906 flow [2024-06-04 16:15:14,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1845, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1906, PETRI_PLACES=242, PETRI_TRANSITIONS=185} [2024-06-04 16:15:14,177 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 200 predicate places. [2024-06-04 16:15:14,177 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 185 transitions, 1906 flow [2024-06-04 16:15:14,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:14,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:14,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:14,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-04 16:15:14,178 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:14,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:14,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1548932109, now seen corresponding path program 3 times [2024-06-04 16:15:14,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:14,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229160422] [2024-06-04 16:15:14,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:14,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:14,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:14,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:14,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:14,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229160422] [2024-06-04 16:15:14,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229160422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:14,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:14,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:15:14,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797036033] [2024-06-04 16:15:14,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:14,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:15:14,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:14,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:15:14,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:15:14,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:14,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 185 transitions, 1906 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:14,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:14,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:14,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:14,834 INFO L124 PetriNetUnfolderBase]: 1741/3088 cut-off events. [2024-06-04 16:15:14,834 INFO L125 PetriNetUnfolderBase]: For 272181/272181 co-relation queries the response was YES. [2024-06-04 16:15:14,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17549 conditions, 3088 events. 1741/3088 cut-off events. For 272181/272181 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 19790 event pairs, 354 based on Foata normal form. 18/3103 useless extension candidates. Maximal degree in co-relation 17442. Up to 1026 conditions per place. [2024-06-04 16:15:14,862 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 121 selfloop transitions, 73 changer transitions 22/223 dead transitions. [2024-06-04 16:15:14,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 223 transitions, 2820 flow [2024-06-04 16:15:14,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:15:14,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:15:14,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 223 transitions. [2024-06-04 16:15:14,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5439024390243903 [2024-06-04 16:15:14,863 INFO L175 Difference]: Start difference. First operand has 242 places, 185 transitions, 1906 flow. Second operand 10 states and 223 transitions. [2024-06-04 16:15:14,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 223 transitions, 2820 flow [2024-06-04 16:15:15,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 223 transitions, 2599 flow, removed 12 selfloop flow, removed 15 redundant places. [2024-06-04 16:15:15,604 INFO L231 Difference]: Finished difference. Result has 227 places, 176 transitions, 1751 flow [2024-06-04 16:15:15,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1701, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1751, PETRI_PLACES=227, PETRI_TRANSITIONS=176} [2024-06-04 16:15:15,604 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 185 predicate places. [2024-06-04 16:15:15,604 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 176 transitions, 1751 flow [2024-06-04 16:15:15,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:15,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:15,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:15,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-04 16:15:15,605 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:15,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:15,605 INFO L85 PathProgramCache]: Analyzing trace with hash 549725483, now seen corresponding path program 4 times [2024-06-04 16:15:15,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:15,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384069627] [2024-06-04 16:15:15,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:15,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:15,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:15,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:15,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:15,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384069627] [2024-06-04 16:15:15,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384069627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:15,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:15,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:15:15,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198389443] [2024-06-04 16:15:15,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:15,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:15:15,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:15,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:15:15,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:15:15,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:15,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 176 transitions, 1751 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:15,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:15,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:15,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:16,221 INFO L124 PetriNetUnfolderBase]: 1609/2858 cut-off events. [2024-06-04 16:15:16,221 INFO L125 PetriNetUnfolderBase]: For 302751/302751 co-relation queries the response was YES. [2024-06-04 16:15:16,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17824 conditions, 2858 events. 1609/2858 cut-off events. For 302751/302751 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 18121 event pairs, 498 based on Foata normal form. 18/2871 useless extension candidates. Maximal degree in co-relation 17720. Up to 1556 conditions per place. [2024-06-04 16:15:16,246 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 128 selfloop transitions, 61 changer transitions 14/210 dead transitions. [2024-06-04 16:15:16,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 210 transitions, 2603 flow [2024-06-04 16:15:16,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:15:16,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:15:16,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 220 transitions. [2024-06-04 16:15:16,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-04 16:15:16,247 INFO L175 Difference]: Start difference. First operand has 227 places, 176 transitions, 1751 flow. Second operand 10 states and 220 transitions. [2024-06-04 16:15:16,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 210 transitions, 2603 flow [2024-06-04 16:15:16,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 210 transitions, 2429 flow, removed 18 selfloop flow, removed 11 redundant places. [2024-06-04 16:15:16,816 INFO L231 Difference]: Finished difference. Result has 218 places, 168 transitions, 1661 flow [2024-06-04 16:15:16,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1601, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1661, PETRI_PLACES=218, PETRI_TRANSITIONS=168} [2024-06-04 16:15:16,817 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 176 predicate places. [2024-06-04 16:15:16,817 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 168 transitions, 1661 flow [2024-06-04 16:15:16,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:16,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:16,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:16,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-04 16:15:16,817 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:16,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:16,817 INFO L85 PathProgramCache]: Analyzing trace with hash 549735713, now seen corresponding path program 5 times [2024-06-04 16:15:16,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:16,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560230546] [2024-06-04 16:15:16,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:16,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:16,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:17,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:17,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:17,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560230546] [2024-06-04 16:15:17,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560230546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:17,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:17,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:15:17,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273144906] [2024-06-04 16:15:17,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:17,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:15:17,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:17,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:15:17,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:15:17,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:17,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 168 transitions, 1661 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:17,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:17,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:17,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:17,385 INFO L124 PetriNetUnfolderBase]: 1432/2551 cut-off events. [2024-06-04 16:15:17,385 INFO L125 PetriNetUnfolderBase]: For 231203/231203 co-relation queries the response was YES. [2024-06-04 16:15:17,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14925 conditions, 2551 events. 1432/2551 cut-off events. For 231203/231203 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 15778 event pairs, 486 based on Foata normal form. 18/2564 useless extension candidates. Maximal degree in co-relation 14825. Up to 1556 conditions per place. [2024-06-04 16:15:17,406 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 108 selfloop transitions, 53 changer transitions 29/197 dead transitions. [2024-06-04 16:15:17,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 197 transitions, 2295 flow [2024-06-04 16:15:17,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:15:17,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:15:17,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 214 transitions. [2024-06-04 16:15:17,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5219512195121951 [2024-06-04 16:15:17,407 INFO L175 Difference]: Start difference. First operand has 218 places, 168 transitions, 1661 flow. Second operand 10 states and 214 transitions. [2024-06-04 16:15:17,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 197 transitions, 2295 flow [2024-06-04 16:15:18,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 197 transitions, 2154 flow, removed 10 selfloop flow, removed 12 redundant places. [2024-06-04 16:15:18,011 INFO L231 Difference]: Finished difference. Result has 211 places, 154 transitions, 1496 flow [2024-06-04 16:15:18,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1530, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1496, PETRI_PLACES=211, PETRI_TRANSITIONS=154} [2024-06-04 16:15:18,012 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 169 predicate places. [2024-06-04 16:15:18,012 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 154 transitions, 1496 flow [2024-06-04 16:15:18,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:18,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:18,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:18,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-04 16:15:18,012 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:18,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:18,012 INFO L85 PathProgramCache]: Analyzing trace with hash -434599617, now seen corresponding path program 6 times [2024-06-04 16:15:18,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:18,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002665072] [2024-06-04 16:15:18,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:18,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:18,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:18,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:18,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:18,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002665072] [2024-06-04 16:15:18,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002665072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:18,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:18,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:15:18,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127334423] [2024-06-04 16:15:18,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:18,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:15:18,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:18,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:15:18,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:15:18,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:18,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 154 transitions, 1496 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:18,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:18,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:18,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:18,547 INFO L124 PetriNetUnfolderBase]: 1367/2404 cut-off events. [2024-06-04 16:15:18,547 INFO L125 PetriNetUnfolderBase]: For 225414/225414 co-relation queries the response was YES. [2024-06-04 16:15:18,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14099 conditions, 2404 events. 1367/2404 cut-off events. For 225414/225414 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 14736 event pairs, 517 based on Foata normal form. 26/2423 useless extension candidates. Maximal degree in co-relation 14003. Up to 1919 conditions per place. [2024-06-04 16:15:18,567 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 96 selfloop transitions, 56 changer transitions 12/171 dead transitions. [2024-06-04 16:15:18,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 171 transitions, 1890 flow [2024-06-04 16:15:18,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:15:18,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:15:18,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-04 16:15:18,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5048780487804878 [2024-06-04 16:15:18,568 INFO L175 Difference]: Start difference. First operand has 211 places, 154 transitions, 1496 flow. Second operand 10 states and 207 transitions. [2024-06-04 16:15:18,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 171 transitions, 1890 flow [2024-06-04 16:15:18,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 171 transitions, 1795 flow, removed 14 selfloop flow, removed 13 redundant places. [2024-06-04 16:15:18,987 INFO L231 Difference]: Finished difference. Result has 194 places, 150 transitions, 1486 flow [2024-06-04 16:15:18,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1401, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1486, PETRI_PLACES=194, PETRI_TRANSITIONS=150} [2024-06-04 16:15:18,987 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 152 predicate places. [2024-06-04 16:15:18,987 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 150 transitions, 1486 flow [2024-06-04 16:15:18,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:18,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:18,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:18,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-04 16:15:18,988 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:18,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:18,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1898904209, now seen corresponding path program 7 times [2024-06-04 16:15:18,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:18,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868365209] [2024-06-04 16:15:18,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:18,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:18,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:19,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:19,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:19,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868365209] [2024-06-04 16:15:19,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868365209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:19,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:19,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:15:19,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059995685] [2024-06-04 16:15:19,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:19,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:15:19,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:19,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:15:19,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:15:19,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:19,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 150 transitions, 1486 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:19,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:19,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:19,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:19,555 INFO L124 PetriNetUnfolderBase]: 1479/2612 cut-off events. [2024-06-04 16:15:19,555 INFO L125 PetriNetUnfolderBase]: For 234884/234884 co-relation queries the response was YES. [2024-06-04 16:15:19,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16026 conditions, 2612 events. 1479/2612 cut-off events. For 234884/234884 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 16457 event pairs, 570 based on Foata normal form. 24/2629 useless extension candidates. Maximal degree in co-relation 15937. Up to 1865 conditions per place. [2024-06-04 16:15:19,577 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 103 selfloop transitions, 51 changer transitions 13/174 dead transitions. [2024-06-04 16:15:19,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 174 transitions, 2054 flow [2024-06-04 16:15:19,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:15:19,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:15:19,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-04 16:15:19,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5146341463414634 [2024-06-04 16:15:19,578 INFO L175 Difference]: Start difference. First operand has 194 places, 150 transitions, 1486 flow. Second operand 10 states and 211 transitions. [2024-06-04 16:15:19,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 174 transitions, 2054 flow [2024-06-04 16:15:19,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 174 transitions, 1922 flow, removed 10 selfloop flow, removed 12 redundant places. [2024-06-04 16:15:19,781 INFO L231 Difference]: Finished difference. Result has 189 places, 144 transitions, 1419 flow [2024-06-04 16:15:19,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1364, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1419, PETRI_PLACES=189, PETRI_TRANSITIONS=144} [2024-06-04 16:15:19,781 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 147 predicate places. [2024-06-04 16:15:19,781 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 144 transitions, 1419 flow [2024-06-04 16:15:19,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:19,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:19,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:19,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-04 16:15:19,782 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:19,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:19,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1149255123, now seen corresponding path program 8 times [2024-06-04 16:15:19,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:19,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700682768] [2024-06-04 16:15:19,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:19,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:19,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:19,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:19,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:19,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700682768] [2024-06-04 16:15:19,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700682768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:19,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:19,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:15:19,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852238838] [2024-06-04 16:15:19,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:19,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:15:19,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:19,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:15:19,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:15:20,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:20,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 144 transitions, 1419 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:20,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:20,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:20,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:20,307 INFO L124 PetriNetUnfolderBase]: 1323/2346 cut-off events. [2024-06-04 16:15:20,307 INFO L125 PetriNetUnfolderBase]: For 165680/165680 co-relation queries the response was YES. [2024-06-04 16:15:20,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13156 conditions, 2346 events. 1323/2346 cut-off events. For 165680/165680 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 14439 event pairs, 525 based on Foata normal form. 26/2365 useless extension candidates. Maximal degree in co-relation 13071. Up to 1865 conditions per place. [2024-06-04 16:15:20,326 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 92 selfloop transitions, 48 changer transitions 14/161 dead transitions. [2024-06-04 16:15:20,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 161 transitions, 1793 flow [2024-06-04 16:15:20,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:15:20,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:15:20,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-04 16:15:20,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4975609756097561 [2024-06-04 16:15:20,327 INFO L175 Difference]: Start difference. First operand has 189 places, 144 transitions, 1419 flow. Second operand 10 states and 204 transitions. [2024-06-04 16:15:20,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 161 transitions, 1793 flow [2024-06-04 16:15:20,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 161 transitions, 1688 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-04 16:15:20,559 INFO L231 Difference]: Finished difference. Result has 186 places, 138 transitions, 1370 flow [2024-06-04 16:15:20,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1314, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1370, PETRI_PLACES=186, PETRI_TRANSITIONS=138} [2024-06-04 16:15:20,560 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 144 predicate places. [2024-06-04 16:15:20,560 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 138 transitions, 1370 flow [2024-06-04 16:15:20,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:20,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:20,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:20,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-04 16:15:20,560 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:20,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:20,561 INFO L85 PathProgramCache]: Analyzing trace with hash -237914847, now seen corresponding path program 9 times [2024-06-04 16:15:20,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:20,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967994715] [2024-06-04 16:15:20,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:20,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:20,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:20,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:20,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:20,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967994715] [2024-06-04 16:15:20,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967994715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:20,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:20,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:15:20,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221678918] [2024-06-04 16:15:20,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:20,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:15:20,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:20,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:15:20,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:15:20,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:20,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 138 transitions, 1370 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:20,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:20,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:20,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:21,181 INFO L124 PetriNetUnfolderBase]: 1479/2638 cut-off events. [2024-06-04 16:15:21,181 INFO L125 PetriNetUnfolderBase]: For 207514/207514 co-relation queries the response was YES. [2024-06-04 16:15:21,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16214 conditions, 2638 events. 1479/2638 cut-off events. For 207514/207514 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 16752 event pairs, 499 based on Foata normal form. 18/2649 useless extension candidates. Maximal degree in co-relation 16131. Up to 1497 conditions per place. [2024-06-04 16:15:21,198 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 95 selfloop transitions, 52 changer transitions 11/165 dead transitions. [2024-06-04 16:15:21,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 165 transitions, 1922 flow [2024-06-04 16:15:21,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:15:21,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:15:21,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 213 transitions. [2024-06-04 16:15:21,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5195121951219512 [2024-06-04 16:15:21,199 INFO L175 Difference]: Start difference. First operand has 186 places, 138 transitions, 1370 flow. Second operand 10 states and 213 transitions. [2024-06-04 16:15:21,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 165 transitions, 1922 flow [2024-06-04 16:15:21,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 165 transitions, 1818 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-04 16:15:21,408 INFO L231 Difference]: Finished difference. Result has 183 places, 133 transitions, 1344 flow [2024-06-04 16:15:21,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1270, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1344, PETRI_PLACES=183, PETRI_TRANSITIONS=133} [2024-06-04 16:15:21,408 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 141 predicate places. [2024-06-04 16:15:21,408 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 133 transitions, 1344 flow [2024-06-04 16:15:21,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:21,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:21,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:21,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-04 16:15:21,409 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:21,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:21,409 INFO L85 PathProgramCache]: Analyzing trace with hash -2041363469, now seen corresponding path program 10 times [2024-06-04 16:15:21,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:21,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893521990] [2024-06-04 16:15:21,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:21,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:21,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:21,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:21,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:21,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893521990] [2024-06-04 16:15:21,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893521990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:21,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:21,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:15:21,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786647130] [2024-06-04 16:15:21,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:21,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:15:21,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:21,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:15:21,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:15:21,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:21,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 133 transitions, 1344 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:21,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:21,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:21,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:21,917 INFO L124 PetriNetUnfolderBase]: 1362/2431 cut-off events. [2024-06-04 16:15:21,917 INFO L125 PetriNetUnfolderBase]: For 173874/173874 co-relation queries the response was YES. [2024-06-04 16:15:21,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14551 conditions, 2431 events. 1362/2431 cut-off events. For 173874/173874 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 15129 event pairs, 535 based on Foata normal form. 18/2444 useless extension candidates. Maximal degree in co-relation 14469. Up to 1497 conditions per place. [2024-06-04 16:15:21,934 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 88 selfloop transitions, 41 changer transitions 23/159 dead transitions. [2024-06-04 16:15:21,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 159 transitions, 1868 flow [2024-06-04 16:15:21,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:15:21,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:15:21,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 212 transitions. [2024-06-04 16:15:21,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5170731707317073 [2024-06-04 16:15:21,935 INFO L175 Difference]: Start difference. First operand has 183 places, 133 transitions, 1344 flow. Second operand 10 states and 212 transitions. [2024-06-04 16:15:21,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 159 transitions, 1868 flow [2024-06-04 16:15:22,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 159 transitions, 1763 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-04 16:15:22,083 INFO L231 Difference]: Finished difference. Result has 182 places, 120 transitions, 1211 flow [2024-06-04 16:15:22,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1243, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1211, PETRI_PLACES=182, PETRI_TRANSITIONS=120} [2024-06-04 16:15:22,083 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 140 predicate places. [2024-06-04 16:15:22,083 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 120 transitions, 1211 flow [2024-06-04 16:15:22,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:22,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:22,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:22,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-04 16:15:22,084 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:22,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:22,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1951727513, now seen corresponding path program 11 times [2024-06-04 16:15:22,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:22,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942862877] [2024-06-04 16:15:22,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:22,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:22,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:22,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:22,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:22,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942862877] [2024-06-04 16:15:22,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942862877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:22,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:22,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:15:22,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686952909] [2024-06-04 16:15:22,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:22,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:15:22,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:22,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:15:22,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:15:22,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:22,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 120 transitions, 1211 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:22,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:22,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:22,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:22,585 INFO L124 PetriNetUnfolderBase]: 1160/2081 cut-off events. [2024-06-04 16:15:22,585 INFO L125 PetriNetUnfolderBase]: For 140418/140418 co-relation queries the response was YES. [2024-06-04 16:15:22,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11894 conditions, 2081 events. 1160/2081 cut-off events. For 140418/140418 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 12582 event pairs, 445 based on Foata normal form. 24/2100 useless extension candidates. Maximal degree in co-relation 11813. Up to 1497 conditions per place. [2024-06-04 16:15:22,601 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 67 selfloop transitions, 30 changer transitions 37/141 dead transitions. [2024-06-04 16:15:22,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 141 transitions, 1573 flow [2024-06-04 16:15:22,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:15:22,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:15:22,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-04 16:15:22,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4975609756097561 [2024-06-04 16:15:22,601 INFO L175 Difference]: Start difference. First operand has 182 places, 120 transitions, 1211 flow. Second operand 10 states and 204 transitions. [2024-06-04 16:15:22,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 141 transitions, 1573 flow [2024-06-04 16:15:22,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 141 transitions, 1477 flow, removed 10 selfloop flow, removed 16 redundant places. [2024-06-04 16:15:22,807 INFO L231 Difference]: Finished difference. Result has 165 places, 101 transitions, 991 flow [2024-06-04 16:15:22,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1115, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=991, PETRI_PLACES=165, PETRI_TRANSITIONS=101} [2024-06-04 16:15:22,808 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 123 predicate places. [2024-06-04 16:15:22,808 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 101 transitions, 991 flow [2024-06-04 16:15:22,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:22,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:22,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:22,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-04 16:15:22,808 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:22,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:22,808 INFO L85 PathProgramCache]: Analyzing trace with hash -571777263, now seen corresponding path program 12 times [2024-06-04 16:15:22,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:22,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625330385] [2024-06-04 16:15:22,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:22,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:22,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:23,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:23,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:23,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625330385] [2024-06-04 16:15:23,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625330385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:23,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:23,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:15:23,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963192964] [2024-06-04 16:15:23,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:23,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:15:23,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:23,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:15:23,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:15:23,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:23,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 101 transitions, 991 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:23,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:23,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:23,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:23,325 INFO L124 PetriNetUnfolderBase]: 1172/2055 cut-off events. [2024-06-04 16:15:23,325 INFO L125 PetriNetUnfolderBase]: For 126317/126321 co-relation queries the response was YES. [2024-06-04 16:15:23,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12212 conditions, 2055 events. 1172/2055 cut-off events. For 126317/126321 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 12351 event pairs, 514 based on Foata normal form. 28/2080 useless extension candidates. Maximal degree in co-relation 12140. Up to 1411 conditions per place. [2024-06-04 16:15:23,338 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 69 selfloop transitions, 35 changer transitions 10/121 dead transitions. [2024-06-04 16:15:23,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 121 transitions, 1409 flow [2024-06-04 16:15:23,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:15:23,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:15:23,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 191 transitions. [2024-06-04 16:15:23,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5176151761517616 [2024-06-04 16:15:23,339 INFO L175 Difference]: Start difference. First operand has 165 places, 101 transitions, 991 flow. Second operand 9 states and 191 transitions. [2024-06-04 16:15:23,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 121 transitions, 1409 flow [2024-06-04 16:15:23,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 121 transitions, 1281 flow, removed 22 selfloop flow, removed 18 redundant places. [2024-06-04 16:15:23,414 INFO L231 Difference]: Finished difference. Result has 136 places, 98 transitions, 917 flow [2024-06-04 16:15:23,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=885, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=917, PETRI_PLACES=136, PETRI_TRANSITIONS=98} [2024-06-04 16:15:23,414 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 94 predicate places. [2024-06-04 16:15:23,414 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 98 transitions, 917 flow [2024-06-04 16:15:23,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:23,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:23,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:23,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-04 16:15:23,415 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:23,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:23,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1701198429, now seen corresponding path program 1 times [2024-06-04 16:15:23,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:23,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086692453] [2024-06-04 16:15:23,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:23,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:23,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:23,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:23,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:23,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086692453] [2024-06-04 16:15:23,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086692453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:23,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:23,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:15:23,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144570246] [2024-06-04 16:15:23,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:23,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:15:23,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:23,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:15:23,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:15:23,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:23,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 98 transitions, 917 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:23,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:23,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:23,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:23,845 INFO L124 PetriNetUnfolderBase]: 1005/1766 cut-off events. [2024-06-04 16:15:23,845 INFO L125 PetriNetUnfolderBase]: For 63517/63521 co-relation queries the response was YES. [2024-06-04 16:15:23,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9217 conditions, 1766 events. 1005/1766 cut-off events. For 63517/63521 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 10278 event pairs, 465 based on Foata normal form. 30/1793 useless extension candidates. Maximal degree in co-relation 9156. Up to 1411 conditions per place. [2024-06-04 16:15:23,855 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 59 selfloop transitions, 31 changer transitions 14/111 dead transitions. [2024-06-04 16:15:23,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 111 transitions, 1181 flow [2024-06-04 16:15:23,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:15:23,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:15:23,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-04 16:15:23,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4959349593495935 [2024-06-04 16:15:23,855 INFO L175 Difference]: Start difference. First operand has 136 places, 98 transitions, 917 flow. Second operand 9 states and 183 transitions. [2024-06-04 16:15:23,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 111 transitions, 1181 flow [2024-06-04 16:15:23,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 111 transitions, 1110 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-04 16:15:23,903 INFO L231 Difference]: Finished difference. Result has 135 places, 93 transitions, 869 flow [2024-06-04 16:15:23,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=846, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=869, PETRI_PLACES=135, PETRI_TRANSITIONS=93} [2024-06-04 16:15:23,903 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 93 predicate places. [2024-06-04 16:15:23,903 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 93 transitions, 869 flow [2024-06-04 16:15:23,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:23,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:23,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:23,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-04 16:15:23,903 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:23,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:23,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1337650595, now seen corresponding path program 2 times [2024-06-04 16:15:23,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:23,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086926701] [2024-06-04 16:15:23,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:23,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:23,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:24,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:24,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:24,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086926701] [2024-06-04 16:15:24,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086926701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:24,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:24,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:15:24,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084295159] [2024-06-04 16:15:24,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:24,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:15:24,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:24,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:15:24,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:15:24,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:24,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 93 transitions, 869 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:24,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:24,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:24,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:24,408 INFO L124 PetriNetUnfolderBase]: 1244/2189 cut-off events. [2024-06-04 16:15:24,408 INFO L125 PetriNetUnfolderBase]: For 90647/90647 co-relation queries the response was YES. [2024-06-04 16:15:24,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12474 conditions, 2189 events. 1244/2189 cut-off events. For 90647/90647 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 13467 event pairs, 564 based on Foata normal form. 18/2204 useless extension candidates. Maximal degree in co-relation 12414. Up to 1173 conditions per place. [2024-06-04 16:15:24,422 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 69 selfloop transitions, 35 changer transitions 7/118 dead transitions. [2024-06-04 16:15:24,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 118 transitions, 1347 flow [2024-06-04 16:15:24,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:15:24,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:15:24,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-04 16:15:24,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5284552845528455 [2024-06-04 16:15:24,422 INFO L175 Difference]: Start difference. First operand has 135 places, 93 transitions, 869 flow. Second operand 9 states and 195 transitions. [2024-06-04 16:15:24,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 118 transitions, 1347 flow [2024-06-04 16:15:24,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 118 transitions, 1267 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-04 16:15:24,477 INFO L231 Difference]: Finished difference. Result has 130 places, 92 transitions, 867 flow [2024-06-04 16:15:24,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=801, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=867, PETRI_PLACES=130, PETRI_TRANSITIONS=92} [2024-06-04 16:15:24,477 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 88 predicate places. [2024-06-04 16:15:24,477 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 92 transitions, 867 flow [2024-06-04 16:15:24,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:24,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:24,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:24,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-04 16:15:24,478 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:24,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:24,478 INFO L85 PathProgramCache]: Analyzing trace with hash -181649721, now seen corresponding path program 3 times [2024-06-04 16:15:24,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:24,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211007221] [2024-06-04 16:15:24,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:24,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:24,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:24,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:24,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:24,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211007221] [2024-06-04 16:15:24,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211007221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:24,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:24,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:15:24,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352019495] [2024-06-04 16:15:24,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:24,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:15:24,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:24,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:15:24,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:15:24,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:24,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 92 transitions, 867 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:24,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:24,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:24,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:24,951 INFO L124 PetriNetUnfolderBase]: 1260/2211 cut-off events. [2024-06-04 16:15:24,951 INFO L125 PetriNetUnfolderBase]: For 85991/85995 co-relation queries the response was YES. [2024-06-04 16:15:24,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12402 conditions, 2211 events. 1260/2211 cut-off events. For 85991/85995 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 13692 event pairs, 705 based on Foata normal form. 30/2240 useless extension candidates. Maximal degree in co-relation 12344. Up to 1849 conditions per place. [2024-06-04 16:15:24,965 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 60 selfloop transitions, 24 changer transitions 12/103 dead transitions. [2024-06-04 16:15:24,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 103 transitions, 1111 flow [2024-06-04 16:15:24,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:24,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:24,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2024-06-04 16:15:24,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.519163763066202 [2024-06-04 16:15:24,966 INFO L175 Difference]: Start difference. First operand has 130 places, 92 transitions, 867 flow. Second operand 7 states and 149 transitions. [2024-06-04 16:15:24,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 103 transitions, 1111 flow [2024-06-04 16:15:25,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 103 transitions, 1039 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-04 16:15:25,036 INFO L231 Difference]: Finished difference. Result has 128 places, 88 transitions, 815 flow [2024-06-04 16:15:25,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=795, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=815, PETRI_PLACES=128, PETRI_TRANSITIONS=88} [2024-06-04 16:15:25,036 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 86 predicate places. [2024-06-04 16:15:25,036 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 88 transitions, 815 flow [2024-06-04 16:15:25,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:25,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:25,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:25,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-04 16:15:25,037 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:25,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:25,037 INFO L85 PathProgramCache]: Analyzing trace with hash -169269561, now seen corresponding path program 4 times [2024-06-04 16:15:25,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:25,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362866875] [2024-06-04 16:15:25,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:25,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:25,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:25,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:25,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:25,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362866875] [2024-06-04 16:15:25,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362866875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:25,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:25,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:15:25,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750816463] [2024-06-04 16:15:25,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:25,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:15:25,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:25,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:15:25,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:15:25,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:25,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 88 transitions, 815 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:25,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:25,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:25,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:25,550 INFO L124 PetriNetUnfolderBase]: 1050/1867 cut-off events. [2024-06-04 16:15:25,550 INFO L125 PetriNetUnfolderBase]: For 62034/62038 co-relation queries the response was YES. [2024-06-04 16:15:25,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9770 conditions, 1867 events. 1050/1867 cut-off events. For 62034/62038 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 11142 event pairs, 506 based on Foata normal form. 28/1892 useless extension candidates. Maximal degree in co-relation 9712. Up to 1269 conditions per place. [2024-06-04 16:15:25,560 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 67 selfloop transitions, 19 changer transitions 13/106 dead transitions. [2024-06-04 16:15:25,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 106 transitions, 1173 flow [2024-06-04 16:15:25,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:25,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:25,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-06-04 16:15:25,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5331010452961672 [2024-06-04 16:15:25,560 INFO L175 Difference]: Start difference. First operand has 128 places, 88 transitions, 815 flow. Second operand 7 states and 153 transitions. [2024-06-04 16:15:25,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 106 transitions, 1173 flow [2024-06-04 16:15:25,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 106 transitions, 1117 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-04 16:15:25,613 INFO L231 Difference]: Finished difference. Result has 126 places, 82 transitions, 740 flow [2024-06-04 16:15:25,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=763, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=740, PETRI_PLACES=126, PETRI_TRANSITIONS=82} [2024-06-04 16:15:25,614 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 84 predicate places. [2024-06-04 16:15:25,614 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 82 transitions, 740 flow [2024-06-04 16:15:25,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:25,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:25,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:25,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-04 16:15:25,614 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:25,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:25,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1337472965, now seen corresponding path program 5 times [2024-06-04 16:15:25,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:25,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244592131] [2024-06-04 16:15:25,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:25,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:25,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:25,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:25,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:25,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244592131] [2024-06-04 16:15:25,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244592131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:25,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:25,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:15:25,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303004437] [2024-06-04 16:15:25,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:25,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:15:25,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:25,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:15:25,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:15:25,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:25,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 82 transitions, 740 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:25,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:25,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:25,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:26,073 INFO L124 PetriNetUnfolderBase]: 993/1774 cut-off events. [2024-06-04 16:15:26,073 INFO L125 PetriNetUnfolderBase]: For 55208/55208 co-relation queries the response was YES. [2024-06-04 16:15:26,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9229 conditions, 1774 events. 993/1774 cut-off events. For 55208/55208 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 10515 event pairs, 462 based on Foata normal form. 18/1789 useless extension candidates. Maximal degree in co-relation 9172. Up to 1463 conditions per place. [2024-06-04 16:15:26,084 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 65 selfloop transitions, 10 changer transitions 14/96 dead transitions. [2024-06-04 16:15:26,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 96 transitions, 974 flow [2024-06-04 16:15:26,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:26,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:26,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-04 16:15:26,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5087108013937283 [2024-06-04 16:15:26,085 INFO L175 Difference]: Start difference. First operand has 126 places, 82 transitions, 740 flow. Second operand 7 states and 146 transitions. [2024-06-04 16:15:26,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 96 transitions, 974 flow [2024-06-04 16:15:26,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 96 transitions, 925 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-04 16:15:26,126 INFO L231 Difference]: Finished difference. Result has 123 places, 78 transitions, 681 flow [2024-06-04 16:15:26,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=691, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=681, PETRI_PLACES=123, PETRI_TRANSITIONS=78} [2024-06-04 16:15:26,126 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 81 predicate places. [2024-06-04 16:15:26,126 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 78 transitions, 681 flow [2024-06-04 16:15:26,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:26,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:26,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:26,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-04 16:15:26,127 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:26,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:26,127 INFO L85 PathProgramCache]: Analyzing trace with hash -523948311, now seen corresponding path program 6 times [2024-06-04 16:15:26,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:26,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355870858] [2024-06-04 16:15:26,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:26,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:26,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:26,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:26,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:26,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355870858] [2024-06-04 16:15:26,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355870858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:26,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:26,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:15:26,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775220328] [2024-06-04 16:15:26,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:26,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:15:26,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:26,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:15:26,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:15:26,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:26,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 78 transitions, 681 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:26,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:26,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:26,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:26,541 INFO L124 PetriNetUnfolderBase]: 853/1524 cut-off events. [2024-06-04 16:15:26,541 INFO L125 PetriNetUnfolderBase]: For 40833/40837 co-relation queries the response was YES. [2024-06-04 16:15:26,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7413 conditions, 1524 events. 853/1524 cut-off events. For 40833/40837 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 8676 event pairs, 448 based on Foata normal form. 30/1553 useless extension candidates. Maximal degree in co-relation 7358. Up to 1203 conditions per place. [2024-06-04 16:15:26,549 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 52 selfloop transitions, 17 changer transitions 13/89 dead transitions. [2024-06-04 16:15:26,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 89 transitions, 897 flow [2024-06-04 16:15:26,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:26,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:26,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-04 16:15:26,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5087108013937283 [2024-06-04 16:15:26,550 INFO L175 Difference]: Start difference. First operand has 123 places, 78 transitions, 681 flow. Second operand 7 states and 146 transitions. [2024-06-04 16:15:26,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 89 transitions, 897 flow [2024-06-04 16:15:26,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 89 transitions, 869 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-04 16:15:26,580 INFO L231 Difference]: Finished difference. Result has 121 places, 73 transitions, 653 flow [2024-06-04 16:15:26,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=653, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=653, PETRI_PLACES=121, PETRI_TRANSITIONS=73} [2024-06-04 16:15:26,580 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 79 predicate places. [2024-06-04 16:15:26,580 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 73 transitions, 653 flow [2024-06-04 16:15:26,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:26,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:26,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:26,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-04 16:15:26,581 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:26,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:26,581 INFO L85 PathProgramCache]: Analyzing trace with hash -99840921, now seen corresponding path program 13 times [2024-06-04 16:15:26,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:26,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21777804] [2024-06-04 16:15:26,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:26,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:26,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:26,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:26,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:26,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21777804] [2024-06-04 16:15:26,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21777804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:26,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:26,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:15:26,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96861085] [2024-06-04 16:15:26,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:26,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:15:26,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:26,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:15:26,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:15:26,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:26,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 73 transitions, 653 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:26,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:26,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:26,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:26,970 INFO L124 PetriNetUnfolderBase]: 722/1317 cut-off events. [2024-06-04 16:15:26,970 INFO L125 PetriNetUnfolderBase]: For 28832/28832 co-relation queries the response was YES. [2024-06-04 16:15:26,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5930 conditions, 1317 events. 722/1317 cut-off events. For 28832/28832 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 7386 event pairs, 324 based on Foata normal form. 24/1338 useless extension candidates. Maximal degree in co-relation 5876. Up to 801 conditions per place. [2024-06-04 16:15:26,976 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 49 selfloop transitions, 10 changer transitions 24/90 dead transitions. [2024-06-04 16:15:26,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 90 transitions, 913 flow [2024-06-04 16:15:26,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:26,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:26,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2024-06-04 16:15:26,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.519163763066202 [2024-06-04 16:15:26,977 INFO L175 Difference]: Start difference. First operand has 121 places, 73 transitions, 653 flow. Second operand 7 states and 149 transitions. [2024-06-04 16:15:26,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 90 transitions, 913 flow [2024-06-04 16:15:26,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 90 transitions, 875 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-04 16:15:26,995 INFO L231 Difference]: Finished difference. Result has 118 places, 64 transitions, 549 flow [2024-06-04 16:15:26,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=615, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=549, PETRI_PLACES=118, PETRI_TRANSITIONS=64} [2024-06-04 16:15:26,996 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 76 predicate places. [2024-06-04 16:15:26,996 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 64 transitions, 549 flow [2024-06-04 16:15:26,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:26,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:26,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:26,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-04 16:15:26,996 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:26,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:26,997 INFO L85 PathProgramCache]: Analyzing trace with hash -92479041, now seen corresponding path program 14 times [2024-06-04 16:15:26,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:26,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366131763] [2024-06-04 16:15:26,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:26,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:27,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:27,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:27,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:27,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366131763] [2024-06-04 16:15:27,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366131763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:27,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:27,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:15:27,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560187886] [2024-06-04 16:15:27,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:27,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:15:27,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:27,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:15:27,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:15:27,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:27,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 64 transitions, 549 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:27,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:27,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:27,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:27,391 INFO L124 PetriNetUnfolderBase]: 561/1044 cut-off events. [2024-06-04 16:15:27,391 INFO L125 PetriNetUnfolderBase]: For 23794/23794 co-relation queries the response was YES. [2024-06-04 16:15:27,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4735 conditions, 1044 events. 561/1044 cut-off events. For 23794/23794 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 5581 event pairs, 211 based on Foata normal form. 18/1059 useless extension candidates. Maximal degree in co-relation 4682. Up to 368 conditions per place. [2024-06-04 16:15:27,396 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 52 selfloop transitions, 13 changer transitions 12/84 dead transitions. [2024-06-04 16:15:27,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 84 transitions, 843 flow [2024-06-04 16:15:27,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:27,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:27,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-04 16:15:27,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5261324041811847 [2024-06-04 16:15:27,397 INFO L175 Difference]: Start difference. First operand has 118 places, 64 transitions, 549 flow. Second operand 7 states and 151 transitions. [2024-06-04 16:15:27,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 84 transitions, 843 flow [2024-06-04 16:15:27,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 84 transitions, 793 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-04 16:15:27,412 INFO L231 Difference]: Finished difference. Result has 108 places, 60 transitions, 502 flow [2024-06-04 16:15:27,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=509, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=502, PETRI_PLACES=108, PETRI_TRANSITIONS=60} [2024-06-04 16:15:27,412 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 66 predicate places. [2024-06-04 16:15:27,412 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 60 transitions, 502 flow [2024-06-04 16:15:27,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:27,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:27,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:27,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-04 16:15:27,413 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:27,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:27,413 INFO L85 PathProgramCache]: Analyzing trace with hash -518537943, now seen corresponding path program 15 times [2024-06-04 16:15:27,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:27,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890054102] [2024-06-04 16:15:27,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:27,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:27,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:27,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:27,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:27,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890054102] [2024-06-04 16:15:27,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890054102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:27,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:27,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:15:27,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540641426] [2024-06-04 16:15:27,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:27,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:15:27,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:27,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:15:27,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:15:27,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:27,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 60 transitions, 502 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:27,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:27,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:27,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:27,765 INFO L124 PetriNetUnfolderBase]: 448/857 cut-off events. [2024-06-04 16:15:27,765 INFO L125 PetriNetUnfolderBase]: For 12586/12586 co-relation queries the response was YES. [2024-06-04 16:15:27,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3484 conditions, 857 events. 448/857 cut-off events. For 12586/12586 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4420 event pairs, 139 based on Foata normal form. 18/872 useless extension candidates. Maximal degree in co-relation 3436. Up to 368 conditions per place. [2024-06-04 16:15:27,768 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 32 selfloop transitions, 3 changer transitions 35/77 dead transitions. [2024-06-04 16:15:27,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 77 transitions, 712 flow [2024-06-04 16:15:27,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:27,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:27,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-04 16:15:27,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-04 16:15:27,769 INFO L175 Difference]: Start difference. First operand has 108 places, 60 transitions, 502 flow. Second operand 7 states and 147 transitions. [2024-06-04 16:15:27,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 77 transitions, 712 flow [2024-06-04 16:15:27,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 77 transitions, 685 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-04 16:15:27,780 INFO L231 Difference]: Finished difference. Result has 107 places, 41 transitions, 281 flow [2024-06-04 16:15:27,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=475, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=281, PETRI_PLACES=107, PETRI_TRANSITIONS=41} [2024-06-04 16:15:27,780 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 65 predicate places. [2024-06-04 16:15:27,780 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 41 transitions, 281 flow [2024-06-04 16:15:27,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:27,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:27,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:27,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-04 16:15:27,781 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:27,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:27,781 INFO L85 PathProgramCache]: Analyzing trace with hash -996194717, now seen corresponding path program 7 times [2024-06-04 16:15:27,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:27,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425672399] [2024-06-04 16:15:27,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:27,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:27,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:27,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:27,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:27,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425672399] [2024-06-04 16:15:27,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425672399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:27,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:27,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:15:27,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763066388] [2024-06-04 16:15:27,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:27,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:15:27,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:27,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:15:27,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:15:28,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:28,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 41 transitions, 281 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:28,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:28,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:28,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:28,145 INFO L124 PetriNetUnfolderBase]: 280/522 cut-off events. [2024-06-04 16:15:28,146 INFO L125 PetriNetUnfolderBase]: For 10713/10713 co-relation queries the response was YES. [2024-06-04 16:15:28,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2172 conditions, 522 events. 280/522 cut-off events. For 10713/10713 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2323 event pairs, 115 based on Foata normal form. 18/534 useless extension candidates. Maximal degree in co-relation 2137. Up to 326 conditions per place. [2024-06-04 16:15:28,148 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 31 selfloop transitions, 5 changer transitions 12/55 dead transitions. [2024-06-04 16:15:28,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 55 transitions, 431 flow [2024-06-04 16:15:28,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:28,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:28,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-04 16:15:28,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4912891986062718 [2024-06-04 16:15:28,149 INFO L175 Difference]: Start difference. First operand has 107 places, 41 transitions, 281 flow. Second operand 7 states and 141 transitions. [2024-06-04 16:15:28,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 55 transitions, 431 flow [2024-06-04 16:15:28,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 55 transitions, 368 flow, removed 21 selfloop flow, removed 19 redundant places. [2024-06-04 16:15:28,154 INFO L231 Difference]: Finished difference. Result has 75 places, 39 transitions, 222 flow [2024-06-04 16:15:28,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=222, PETRI_PLACES=75, PETRI_TRANSITIONS=39} [2024-06-04 16:15:28,154 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 33 predicate places. [2024-06-04 16:15:28,154 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 39 transitions, 222 flow [2024-06-04 16:15:28,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:28,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:28,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:28,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-04 16:15:28,155 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:28,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:28,155 INFO L85 PathProgramCache]: Analyzing trace with hash -991433117, now seen corresponding path program 8 times [2024-06-04 16:15:28,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:28,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989208301] [2024-06-04 16:15:28,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:28,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:28,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:28,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:28,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:28,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989208301] [2024-06-04 16:15:28,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989208301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:28,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:28,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:15:28,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672364608] [2024-06-04 16:15:28,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:28,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:15:28,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:28,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:15:28,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:15:28,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:28,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 39 transitions, 222 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:28,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:28,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:28,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:28,486 INFO L124 PetriNetUnfolderBase]: 256/484 cut-off events. [2024-06-04 16:15:28,486 INFO L125 PetriNetUnfolderBase]: For 3905/3905 co-relation queries the response was YES. [2024-06-04 16:15:28,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1737 conditions, 484 events. 256/484 cut-off events. For 3905/3905 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2150 event pairs, 111 based on Foata normal form. 18/498 useless extension candidates. Maximal degree in co-relation 1714. Up to 290 conditions per place. [2024-06-04 16:15:28,488 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 27 selfloop transitions, 2 changer transitions 17/53 dead transitions. [2024-06-04 16:15:28,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 53 transitions, 364 flow [2024-06-04 16:15:28,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:28,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:28,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-04 16:15:28,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-04 16:15:28,489 INFO L175 Difference]: Start difference. First operand has 75 places, 39 transitions, 222 flow. Second operand 7 states and 140 transitions. [2024-06-04 16:15:28,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 53 transitions, 364 flow [2024-06-04 16:15:28,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 53 transitions, 348 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-04 16:15:28,491 INFO L231 Difference]: Finished difference. Result has 73 places, 35 transitions, 181 flow [2024-06-04 16:15:28,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=181, PETRI_PLACES=73, PETRI_TRANSITIONS=35} [2024-06-04 16:15:28,491 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 31 predicate places. [2024-06-04 16:15:28,491 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 35 transitions, 181 flow [2024-06-04 16:15:28,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:28,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:28,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:28,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-04 16:15:28,491 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:28,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:28,491 INFO L85 PathProgramCache]: Analyzing trace with hash -706896285, now seen corresponding path program 9 times [2024-06-04 16:15:28,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:28,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252145642] [2024-06-04 16:15:28,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:28,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:28,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:28,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:28,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:28,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252145642] [2024-06-04 16:15:28,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252145642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:28,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:28,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:15:28,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483347815] [2024-06-04 16:15:28,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:28,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:15:28,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:28,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:15:28,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:15:28,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:28,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 35 transitions, 181 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:28,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:28,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:28,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:28,828 INFO L124 PetriNetUnfolderBase]: 229/439 cut-off events. [2024-06-04 16:15:28,828 INFO L125 PetriNetUnfolderBase]: For 3787/3787 co-relation queries the response was YES. [2024-06-04 16:15:28,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1564 conditions, 439 events. 229/439 cut-off events. For 3787/3787 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1906 event pairs, 58 based on Foata normal form. 18/453 useless extension candidates. Maximal degree in co-relation 1542. Up to 207 conditions per place. [2024-06-04 16:15:28,829 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 26 selfloop transitions, 4 changer transitions 13/50 dead transitions. [2024-06-04 16:15:28,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 50 transitions, 325 flow [2024-06-04 16:15:28,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:28,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:28,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-04 16:15:28,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-04 16:15:28,830 INFO L175 Difference]: Start difference. First operand has 73 places, 35 transitions, 181 flow. Second operand 7 states and 140 transitions. [2024-06-04 16:15:28,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 50 transitions, 325 flow [2024-06-04 16:15:28,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 50 transitions, 311 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-04 16:15:28,831 INFO L231 Difference]: Finished difference. Result has 66 places, 32 transitions, 151 flow [2024-06-04 16:15:28,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=151, PETRI_PLACES=66, PETRI_TRANSITIONS=32} [2024-06-04 16:15:28,832 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 24 predicate places. [2024-06-04 16:15:28,832 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 32 transitions, 151 flow [2024-06-04 16:15:28,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:28,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:28,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:28,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-04 16:15:28,832 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:28,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:28,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1903825787, now seen corresponding path program 10 times [2024-06-04 16:15:28,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:28,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109679782] [2024-06-04 16:15:28,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:28,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:28,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:29,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:29,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:29,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109679782] [2024-06-04 16:15:29,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109679782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:29,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:29,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:15:29,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843500911] [2024-06-04 16:15:29,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:29,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:15:29,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:29,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:15:29,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:15:29,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:29,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 32 transitions, 151 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:29,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:29,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:29,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:29,157 INFO L124 PetriNetUnfolderBase]: 185/363 cut-off events. [2024-06-04 16:15:29,157 INFO L125 PetriNetUnfolderBase]: For 2259/2259 co-relation queries the response was YES. [2024-06-04 16:15:29,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1249 conditions, 363 events. 185/363 cut-off events. For 2259/2259 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1485 event pairs, 14 based on Foata normal form. 18/381 useless extension candidates. Maximal degree in co-relation 1230. Up to 171 conditions per place. [2024-06-04 16:15:29,158 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 26 selfloop transitions, 4 changer transitions 8/45 dead transitions. [2024-06-04 16:15:29,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 45 transitions, 273 flow [2024-06-04 16:15:29,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:29,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:29,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-04 16:15:29,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738675958188153 [2024-06-04 16:15:29,159 INFO L175 Difference]: Start difference. First operand has 66 places, 32 transitions, 151 flow. Second operand 7 states and 136 transitions. [2024-06-04 16:15:29,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 45 transitions, 273 flow [2024-06-04 16:15:29,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 45 transitions, 252 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-04 16:15:29,160 INFO L231 Difference]: Finished difference. Result has 61 places, 30 transitions, 127 flow [2024-06-04 16:15:29,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=127, PETRI_PLACES=61, PETRI_TRANSITIONS=30} [2024-06-04 16:15:29,160 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 19 predicate places. [2024-06-04 16:15:29,160 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 30 transitions, 127 flow [2024-06-04 16:15:29,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:29,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:29,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:29,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-04 16:15:29,161 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:29,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:29,161 INFO L85 PathProgramCache]: Analyzing trace with hash 586054709, now seen corresponding path program 11 times [2024-06-04 16:15:29,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:29,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773217159] [2024-06-04 16:15:29,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:29,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:29,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:29,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:29,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:29,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773217159] [2024-06-04 16:15:29,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773217159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:29,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:29,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:15:29,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351871546] [2024-06-04 16:15:29,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:29,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:15:29,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:29,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:15:29,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:15:29,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:15:29,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 30 transitions, 127 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:29,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:29,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:15:29,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:29,504 INFO L124 PetriNetUnfolderBase]: 80/176 cut-off events. [2024-06-04 16:15:29,504 INFO L125 PetriNetUnfolderBase]: For 675/675 co-relation queries the response was YES. [2024-06-04 16:15:29,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 528 conditions, 176 events. 80/176 cut-off events. For 675/675 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 506 event pairs, 2 based on Foata normal form. 18/194 useless extension candidates. Maximal degree in co-relation 512. Up to 96 conditions per place. [2024-06-04 16:15:29,505 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 0 selfloop transitions, 0 changer transitions 38/38 dead transitions. [2024-06-04 16:15:29,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 38 transitions, 197 flow [2024-06-04 16:15:29,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:29,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:29,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-04 16:15:29,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-04 16:15:29,505 INFO L175 Difference]: Start difference. First operand has 61 places, 30 transitions, 127 flow. Second operand 7 states and 130 transitions. [2024-06-04 16:15:29,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 38 transitions, 197 flow [2024-06-04 16:15:29,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 38 transitions, 170 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-04 16:15:29,506 INFO L231 Difference]: Finished difference. Result has 53 places, 0 transitions, 0 flow [2024-06-04 16:15:29,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=53, PETRI_TRANSITIONS=0} [2024-06-04 16:15:29,506 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 11 predicate places. [2024-06-04 16:15:29,506 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 0 transitions, 0 flow [2024-06-04 16:15:29,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:29,508 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 6 remaining) [2024-06-04 16:15:29,509 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 6 remaining) [2024-06-04 16:15:29,510 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 6 remaining) [2024-06-04 16:15:29,510 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 6 remaining) [2024-06-04 16:15:29,510 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 6 remaining) [2024-06-04 16:15:29,510 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 6 remaining) [2024-06-04 16:15:29,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-04 16:15:29,511 INFO L445 BasicCegarLoop]: Path program histogram: [15, 14, 13, 11, 11, 8, 7, 7, 6, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:29,513 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-04 16:15:29,513 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-04 16:15:29,517 INFO L507 ceAbstractionStarter]: Automizer considered 3 witness invariants [2024-06-04 16:15:29,517 INFO L508 ceAbstractionStarter]: WitnessConsidered=3 [2024-06-04 16:15:29,517 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.06 04:15:29 BasicIcfg [2024-06-04 16:15:29,517 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-04 16:15:29,518 INFO L158 Benchmark]: Toolchain (without parser) took 136728.59ms. Allocated memory was 176.2MB in the beginning and 1.8GB in the end (delta: 1.7GB). Free memory was 135.1MB in the beginning and 765.7MB in the end (delta: -630.5MB). Peak memory consumption was 1.0GB. Max. memory is 16.1GB. [2024-06-04 16:15:29,518 INFO L158 Benchmark]: Witness Parser took 0.15ms. Allocated memory is still 113.2MB. Free memory is still 73.7MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-04 16:15:29,518 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 113.2MB. Free memory is still 84.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-04 16:15:29,518 INFO L158 Benchmark]: CACSL2BoogieTranslator took 477.78ms. Allocated memory is still 176.2MB. Free memory was 135.0MB in the beginning and 105.2MB in the end (delta: 29.8MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. [2024-06-04 16:15:29,518 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.30ms. Allocated memory is still 176.2MB. Free memory was 105.2MB in the beginning and 102.5MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-04 16:15:29,519 INFO L158 Benchmark]: Boogie Preprocessor took 39.26ms. Allocated memory is still 176.2MB. Free memory was 102.5MB in the beginning and 99.8MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-04 16:15:29,519 INFO L158 Benchmark]: RCFGBuilder took 495.06ms. Allocated memory is still 176.2MB. Free memory was 99.8MB in the beginning and 62.7MB in the end (delta: 37.2MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. [2024-06-04 16:15:29,519 INFO L158 Benchmark]: TraceAbstraction took 135661.06ms. Allocated memory was 176.2MB in the beginning and 1.8GB in the end (delta: 1.7GB). Free memory was 62.1MB in the beginning and 765.7MB in the end (delta: -703.6MB). Peak memory consumption was 964.3MB. Max. memory is 16.1GB. [2024-06-04 16:15:29,520 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.15ms. Allocated memory is still 113.2MB. Free memory is still 73.7MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.13ms. Allocated memory is still 113.2MB. Free memory is still 84.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 477.78ms. Allocated memory is still 176.2MB. Free memory was 135.0MB in the beginning and 105.2MB in the end (delta: 29.8MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 49.30ms. Allocated memory is still 176.2MB. Free memory was 105.2MB in the beginning and 102.5MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 39.26ms. Allocated memory is still 176.2MB. Free memory was 102.5MB in the beginning and 99.8MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 495.06ms. Allocated memory is still 176.2MB. Free memory was 99.8MB in the beginning and 62.7MB in the end (delta: 37.2MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. * TraceAbstraction took 135661.06ms. Allocated memory was 176.2MB in the beginning and 1.8GB in the end (delta: 1.7GB). Free memory was 62.1MB in the beginning and 765.7MB in the end (delta: -703.6MB). Peak memory consumption was 964.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 778]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 780]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 781]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 66 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 135.6s, OverallIterations: 134, TraceHistogramMax: 1, PathProgramHistogramMax: 15, EmptinessCheckTime: 0.0s, AutomataDifference: 108.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 10118 SdHoareTripleChecker+Valid, 16.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8471 mSDsluCounter, 3517 SdHoareTripleChecker+Invalid, 13.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2727 mSDsCounter, 1407 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 38266 IncrementalHoareTripleChecker+Invalid, 39673 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1407 mSolverCounterUnsat, 790 mSDtfsCounter, 38266 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1061 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 1037 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1600 ImplicationChecksByTransitivity, 5.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3182occurred in iteration=94, InterpolantAutomatonStates: 1067, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 26.0s InterpolantComputationTime, 2679 NumberOfCodeBlocks, 2679 NumberOfCodeBlocksAsserted, 134 NumberOfCheckSat, 2545 ConstructedInterpolants, 0 QuantifiedInterpolants, 26635 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 134 InterpolantComputations, 134 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-04 16:15:29,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE