./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe015_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/safe015_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/safe015_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe015_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 16:07:09,648 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 16:07:09,710 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 16:07:09,721 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 16:07:09,721 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 16:07:09,754 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 16:07:09,755 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 16:07:09,755 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 16:07:09,756 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 16:07:09,760 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 16:07:09,760 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 16:07:09,760 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 16:07:09,761 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 16:07:09,762 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 16:07:09,762 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 16:07:09,762 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 16:07:09,763 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 16:07:09,763 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 16:07:09,763 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 16:07:09,763 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 16:07:09,763 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 16:07:09,764 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 16:07:09,764 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 16:07:09,764 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 16:07:09,764 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 16:07:09,764 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 16:07:09,764 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 16:07:09,765 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 16:07:09,765 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 16:07:09,765 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 16:07:09,766 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 16:07:09,766 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 16:07:09,766 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 16:07:09,767 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 16:07:09,767 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 16:07:09,767 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 16:07:09,767 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 16:07:09,767 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 16:07:09,768 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 16:07:09,768 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 16:07:09,768 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 16:07:09,768 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 16:07:09,768 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 16:07:09,768 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 16:07:09,952 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 16:07:09,969 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 16:07:09,970 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 16:07:09,971 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 16:07:09,972 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 16:07:09,973 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/safe015_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-04 16:07:10,080 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 16:07:10,080 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 16:07:10,080 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe015_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-04 16:07:11,129 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 16:07:11,308 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 16:07:11,308 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe015_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-04 16:07:11,317 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91c66131e/3c54df4807ed46cc95e4c0ba975a9ede/FLAG729ae76de [2024-06-04 16:07:11,327 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91c66131e/3c54df4807ed46cc95e4c0ba975a9ede [2024-06-04 16:07:11,327 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 16:07:11,328 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 16:07:11,329 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 16:07:11,329 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 16:07:11,333 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 16:07:11,333 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 04:07:10" (1/2) ... [2024-06-04 16:07:11,334 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30eac8c7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:07:11, skipping insertion in model container [2024-06-04 16:07:11,334 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 04:07:10" (1/2) ... [2024-06-04 16:07:11,335 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4b6d8d37 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:07:11, skipping insertion in model container [2024-06-04 16:07:11,335 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 04:07:11" (2/2) ... [2024-06-04 16:07:11,335 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30eac8c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:07:11, skipping insertion in model container [2024-06-04 16:07:11,335 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 04:07:11" (2/2) ... [2024-06-04 16:07:11,336 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 16:07:11,374 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 16:07:11,375 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! 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 <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EAX <= 127) && __unbuffered_p2_EAX <= 127) && y <= 2) && y <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-06-04 16:07:11,375 INFO L97 edCorrectnessWitness]: Location invariant before [L784-L784] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! 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 <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EAX <= 127) && __unbuffered_p2_EAX <= 127) && y <= 2) && y <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-06-04 16:07:11,375 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! 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 <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EAX <= 127) && __unbuffered_p2_EAX <= 127) && y <= 2) && y <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-06-04 16:07:11,375 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 16:07:11,376 INFO L106 edCorrectnessWitness]: ghost_update [L779-L779] multithreaded = 1; [2024-06-04 16:07:11,410 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 16:07:11,678 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 16:07:11,687 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 16:07:11,781 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 16:07:11,815 INFO L206 MainTranslator]: Completed translation [2024-06-04 16:07:11,816 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:07:11 WrapperNode [2024-06-04 16:07:11,816 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 16:07:11,817 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 16:07:11,817 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 16:07:11,817 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 16:07:11,822 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:07:11" (1/1) ... [2024-06-04 16:07:11,845 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:07:11" (1/1) ... [2024-06-04 16:07:11,876 INFO L138 Inliner]: procedures = 175, calls = 44, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 65 [2024-06-04 16:07:11,876 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 16:07:11,877 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 16:07:11,877 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 16:07:11,877 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 16:07:11,885 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:07:11" (1/1) ... [2024-06-04 16:07:11,885 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:07:11" (1/1) ... [2024-06-04 16:07:11,887 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:07:11" (1/1) ... [2024-06-04 16:07:11,897 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 16:07:11,898 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:07:11" (1/1) ... [2024-06-04 16:07:11,898 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:07:11" (1/1) ... [2024-06-04 16:07:11,903 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:07:11" (1/1) ... [2024-06-04 16:07:11,904 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:07:11" (1/1) ... [2024-06-04 16:07:11,905 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:07:11" (1/1) ... [2024-06-04 16:07:11,906 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:07:11" (1/1) ... [2024-06-04 16:07:11,909 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 16:07:11,910 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 16:07:11,910 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 16:07:11,910 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 16:07:11,915 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:07:11" (1/1) ... [2024-06-04 16:07:11,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 16:07:11,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 16:07:11,937 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 16:07:11,963 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 16:07:11,997 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-04 16:07:11,997 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 16:07:11,997 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-04 16:07:11,997 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-04 16:07:11,997 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-04 16:07:11,997 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-04 16:07:11,997 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-04 16:07:11,997 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-04 16:07:11,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 16:07:11,998 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-04 16:07:11,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 16:07:11,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 16:07:11,999 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 16:07:12,105 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 16:07:12,106 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 16:07:12,340 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 16:07:12,344 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 16:07:12,409 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 16:07:12,410 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-04 16:07:12,410 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 04:07:12 BoogieIcfgContainer [2024-06-04 16:07:12,410 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 16:07:12,412 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 16:07:12,412 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 16:07:12,414 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 16:07:12,414 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 04:07:10" (1/4) ... [2024-06-04 16:07:12,415 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d04b199 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 04:07:12, skipping insertion in model container [2024-06-04 16:07:12,415 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 04:07:11" (2/4) ... [2024-06-04 16:07:12,415 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d04b199 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 04:07:12, skipping insertion in model container [2024-06-04 16:07:12,415 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:07:11" (3/4) ... [2024-06-04 16:07:12,415 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d04b199 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 04:07:12, skipping insertion in model container [2024-06-04 16:07:12,416 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 04:07:12" (4/4) ... [2024-06-04 16:07:12,416 INFO L112 eAbstractionObserver]: Analyzing ICFG safe015_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-04 16:07:12,429 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 16:07:12,429 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-04 16:07:12,429 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 16:07:12,473 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-04 16:07:12,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-04 16:07:12,533 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-04 16:07:12,533 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 16:07:12,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 70 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-04 16:07:12,535 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-04 16:07:12,537 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-04 16:07:12,551 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 16:07:12,557 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;@24871909, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 16:07:12,557 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-04 16:07:12,561 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 16:07:12,561 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-04 16:07:12,561 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 16:07:12,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:12,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 16:07:12,562 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 16:07:12,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:12,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1782944907, now seen corresponding path program 1 times [2024-06-04 16:07:12,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:12,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264074914] [2024-06-04 16:07:12,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:12,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:12,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:13,075 INFO 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 16:07:13,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:13,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264074914] [2024-06-04 16:07:13,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264074914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:13,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:13,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 16:07:13,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022411646] [2024-06-04 16:07:13,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:13,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 16:07:13,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:13,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 16:07:13,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 16:07:13,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-04 16:07:13,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 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 16:07:13,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:13,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-04 16:07:13,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:13,339 INFO L124 PetriNetUnfolderBase]: 603/1019 cut-off events. [2024-06-04 16:07:13,339 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-06-04 16:07:13,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2013 conditions, 1019 events. 603/1019 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5138 event pairs, 376 based on Foata normal form. 1/963 useless extension candidates. Maximal degree in co-relation 1998. Up to 929 conditions per place. [2024-06-04 16:07:13,351 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 30 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-04 16:07:13,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 169 flow [2024-06-04 16:07:13,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 16:07:13,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 16:07:13,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 85 transitions. [2024-06-04 16:07:13,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6746031746031746 [2024-06-04 16:07:13,362 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 85 transitions. [2024-06-04 16:07:13,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 169 flow [2024-06-04 16:07:13,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 164 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-04 16:07:13,368 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-04 16:07:13,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-04 16:07:13,371 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-04 16:07:13,372 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-04 16:07:13,372 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 16:07:13,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:13,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:13,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 16:07:13,372 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 16:07:13,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:13,373 INFO L85 PathProgramCache]: Analyzing trace with hash 281906836, now seen corresponding path program 1 times [2024-06-04 16:07:13,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:13,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911026952] [2024-06-04 16:07:13,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:13,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:13,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:13,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:07:13,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:13,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911026952] [2024-06-04 16:07:13,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911026952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:13,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:13,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 16:07:13,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915918809] [2024-06-04 16:07:13,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:13,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 16:07:13,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:13,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 16:07:13,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-04 16:07:13,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-04 16:07:13,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 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 16:07:13,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:13,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-04 16:07:13,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:13,766 INFO L124 PetriNetUnfolderBase]: 604/1029 cut-off events. [2024-06-04 16:07:13,766 INFO L125 PetriNetUnfolderBase]: For 201/209 co-relation queries the response was YES. [2024-06-04 16:07:13,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2339 conditions, 1029 events. 604/1029 cut-off events. For 201/209 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 5201 event pairs, 320 based on Foata normal form. 7/1010 useless extension candidates. Maximal degree in co-relation 2324. Up to 903 conditions per place. [2024-06-04 16:07:13,772 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 39 selfloop transitions, 11 changer transitions 0/59 dead transitions. [2024-06-04 16:07:13,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 59 transitions, 266 flow [2024-06-04 16:07:13,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:07:13,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:07:13,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 115 transitions. [2024-06-04 16:07:13,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6845238095238095 [2024-06-04 16:07:13,776 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 115 transitions. [2024-06-04 16:07:13,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 59 transitions, 266 flow [2024-06-04 16:07:13,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 59 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 16:07:13,778 INFO L231 Difference]: Finished difference. Result has 47 places, 44 transitions, 174 flow [2024-06-04 16:07:13,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=174, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2024-06-04 16:07:13,779 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 4 predicate places. [2024-06-04 16:07:13,779 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 174 flow [2024-06-04 16:07:13,779 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 16:07:13,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:13,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:13,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 16:07:13,780 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 16:07:13,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:13,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1529058956, now seen corresponding path program 1 times [2024-06-04 16:07:13,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:13,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020771581] [2024-06-04 16:07:13,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:13,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:13,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:14,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:07:14,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:14,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020771581] [2024-06-04 16:07:14,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020771581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:14,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:14,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 16:07:14,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524218391] [2024-06-04 16:07:14,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:14,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 16:07:14,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:14,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 16:07:14,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-04 16:07:14,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:14,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 174 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 16:07:14,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:14,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:14,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:14,207 INFO L124 PetriNetUnfolderBase]: 934/1514 cut-off events. [2024-06-04 16:07:14,208 INFO L125 PetriNetUnfolderBase]: For 1013/1013 co-relation queries the response was YES. [2024-06-04 16:07:14,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4065 conditions, 1514 events. 934/1514 cut-off events. For 1013/1013 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7563 event pairs, 515 based on Foata normal form. 2/1514 useless extension candidates. Maximal degree in co-relation 4047. Up to 1394 conditions per place. [2024-06-04 16:07:14,214 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 49 selfloop transitions, 9 changer transitions 0/65 dead transitions. [2024-06-04 16:07:14,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 65 transitions, 365 flow [2024-06-04 16:07:14,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:07:14,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:07:14,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-06-04 16:07:14,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-04 16:07:14,216 INFO L175 Difference]: Start difference. First operand has 47 places, 44 transitions, 174 flow. Second operand 4 states and 104 transitions. [2024-06-04 16:07:14,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 65 transitions, 365 flow [2024-06-04 16:07:14,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 65 transitions, 361 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-04 16:07:14,218 INFO L231 Difference]: Finished difference. Result has 52 places, 52 transitions, 250 flow [2024-06-04 16:07:14,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=250, PETRI_PLACES=52, PETRI_TRANSITIONS=52} [2024-06-04 16:07:14,219 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-04 16:07:14,219 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 52 transitions, 250 flow [2024-06-04 16:07:14,220 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 16:07:14,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:14,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:14,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 16:07:14,220 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 16:07:14,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:14,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1136654126, now seen corresponding path program 1 times [2024-06-04 16:07:14,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:14,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376954092] [2024-06-04 16:07:14,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:14,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:14,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:14,424 INFO 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 16:07:14,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:14,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376954092] [2024-06-04 16:07:14,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376954092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:14,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:14,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:07:14,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804483799] [2024-06-04 16:07:14,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:14,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:07:14,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:14,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:07:14,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:07:14,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 16:07:14,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 52 transitions, 250 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 16:07:14,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:14,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 16:07:14,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:14,696 INFO L124 PetriNetUnfolderBase]: 934/1539 cut-off events. [2024-06-04 16:07:14,696 INFO L125 PetriNetUnfolderBase]: For 1914/1935 co-relation queries the response was YES. [2024-06-04 16:07:14,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4648 conditions, 1539 events. 934/1539 cut-off events. For 1914/1935 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 7910 event pairs, 249 based on Foata normal form. 20/1540 useless extension candidates. Maximal degree in co-relation 4626. Up to 1283 conditions per place. [2024-06-04 16:07:14,705 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 59 selfloop transitions, 19 changer transitions 0/88 dead transitions. [2024-06-04 16:07:14,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 88 transitions, 516 flow [2024-06-04 16:07:14,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:07:14,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:07:14,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-04 16:07:14,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6468253968253969 [2024-06-04 16:07:14,708 INFO L175 Difference]: Start difference. First operand has 52 places, 52 transitions, 250 flow. Second operand 6 states and 163 transitions. [2024-06-04 16:07:14,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 88 transitions, 516 flow [2024-06-04 16:07:14,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 88 transitions, 512 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-04 16:07:14,715 INFO L231 Difference]: Finished difference. Result has 58 places, 57 transitions, 329 flow [2024-06-04 16:07:14,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=329, PETRI_PLACES=58, PETRI_TRANSITIONS=57} [2024-06-04 16:07:14,717 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 15 predicate places. [2024-06-04 16:07:14,717 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 57 transitions, 329 flow [2024-06-04 16:07:14,717 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 16:07:14,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:14,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:14,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 16:07:14,718 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 16:07:14,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:14,718 INFO L85 PathProgramCache]: Analyzing trace with hash 132057963, now seen corresponding path program 1 times [2024-06-04 16:07:14,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:14,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257544002] [2024-06-04 16:07:14,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:14,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:14,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:14,945 INFO 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 16:07:14,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:14,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257544002] [2024-06-04 16:07:14,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257544002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:14,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:14,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 16:07:14,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766769724] [2024-06-04 16:07:14,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:14,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 16:07:14,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:14,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 16:07:14,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-04 16:07:14,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:14,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 57 transitions, 329 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:14,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:14,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:14,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:15,154 INFO L124 PetriNetUnfolderBase]: 953/1562 cut-off events. [2024-06-04 16:07:15,155 INFO L125 PetriNetUnfolderBase]: For 2704/2706 co-relation queries the response was YES. [2024-06-04 16:07:15,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5180 conditions, 1562 events. 953/1562 cut-off events. For 2704/2706 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7927 event pairs, 379 based on Foata normal form. 4/1565 useless extension candidates. Maximal degree in co-relation 5154. Up to 1429 conditions per place. [2024-06-04 16:07:15,165 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 53 selfloop transitions, 9 changer transitions 0/69 dead transitions. [2024-06-04 16:07:15,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 69 transitions, 486 flow [2024-06-04 16:07:15,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:07:15,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:07:15,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-04 16:07:15,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6011904761904762 [2024-06-04 16:07:15,168 INFO L175 Difference]: Start difference. First operand has 58 places, 57 transitions, 329 flow. Second operand 4 states and 101 transitions. [2024-06-04 16:07:15,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 69 transitions, 486 flow [2024-06-04 16:07:15,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 69 transitions, 448 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-04 16:07:15,174 INFO L231 Difference]: Finished difference. Result has 59 places, 58 transitions, 322 flow [2024-06-04 16:07:15,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=322, PETRI_PLACES=59, PETRI_TRANSITIONS=58} [2024-06-04 16:07:15,177 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-04 16:07:15,177 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 58 transitions, 322 flow [2024-06-04 16:07:15,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:15,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:15,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:15,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 16:07:15,181 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 16:07:15,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:15,182 INFO L85 PathProgramCache]: Analyzing trace with hash -207844287, now seen corresponding path program 1 times [2024-06-04 16:07:15,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:15,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734772803] [2024-06-04 16:07:15,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:15,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:15,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:15,399 INFO 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 16:07:15,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:15,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734772803] [2024-06-04 16:07:15,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734772803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:15,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:15,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:07:15,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862028441] [2024-06-04 16:07:15,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:15,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:07:15,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:15,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:07:15,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:07:15,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:15,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 58 transitions, 322 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 16:07:15,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:15,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:15,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:15,598 INFO L124 PetriNetUnfolderBase]: 964/1574 cut-off events. [2024-06-04 16:07:15,598 INFO L125 PetriNetUnfolderBase]: For 3150/3150 co-relation queries the response was YES. [2024-06-04 16:07:15,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5244 conditions, 1574 events. 964/1574 cut-off events. For 3150/3150 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7901 event pairs, 354 based on Foata normal form. 2/1574 useless extension candidates. Maximal degree in co-relation 5217. Up to 1387 conditions per place. [2024-06-04 16:07:15,608 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 64 selfloop transitions, 16 changer transitions 0/87 dead transitions. [2024-06-04 16:07:15,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 87 transitions, 591 flow [2024-06-04 16:07:15,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:07:15,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:07:15,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-04 16:07:15,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-04 16:07:15,609 INFO L175 Difference]: Start difference. First operand has 59 places, 58 transitions, 322 flow. Second operand 5 states and 130 transitions. [2024-06-04 16:07:15,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 87 transitions, 591 flow [2024-06-04 16:07:15,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 87 transitions, 579 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-04 16:07:15,614 INFO L231 Difference]: Finished difference. Result has 64 places, 66 transitions, 406 flow [2024-06-04 16:07:15,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=406, PETRI_PLACES=64, PETRI_TRANSITIONS=66} [2024-06-04 16:07:15,615 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-06-04 16:07:15,615 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 66 transitions, 406 flow [2024-06-04 16:07:15,615 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 16:07:15,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:15,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:15,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-04 16:07:15,616 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 16:07:15,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:15,616 INFO L85 PathProgramCache]: Analyzing trace with hash 571898403, now seen corresponding path program 2 times [2024-06-04 16:07:15,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:15,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713966170] [2024-06-04 16:07:15,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:15,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:15,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:15,804 INFO 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 16:07:15,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:15,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713966170] [2024-06-04 16:07:15,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713966170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:15,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:15,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:07:15,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021141185] [2024-06-04 16:07:15,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:15,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:07:15,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:15,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:07:15,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:07:15,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:15,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 66 transitions, 406 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 16:07:15,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:15,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:15,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:15,985 INFO L124 PetriNetUnfolderBase]: 959/1560 cut-off events. [2024-06-04 16:07:15,985 INFO L125 PetriNetUnfolderBase]: For 4457/4457 co-relation queries the response was YES. [2024-06-04 16:07:15,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5734 conditions, 1560 events. 959/1560 cut-off events. For 4457/4457 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7791 event pairs, 355 based on Foata normal form. 2/1558 useless extension candidates. Maximal degree in co-relation 5704. Up to 1384 conditions per place. [2024-06-04 16:07:15,996 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 60 selfloop transitions, 19 changer transitions 0/86 dead transitions. [2024-06-04 16:07:15,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 86 transitions, 650 flow [2024-06-04 16:07:15,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:07:15,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:07:15,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-04 16:07:15,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-04 16:07:15,997 INFO L175 Difference]: Start difference. First operand has 64 places, 66 transitions, 406 flow. Second operand 5 states and 126 transitions. [2024-06-04 16:07:15,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 86 transitions, 650 flow [2024-06-04 16:07:16,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 86 transitions, 630 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-04 16:07:16,005 INFO L231 Difference]: Finished difference. Result has 68 places, 69 transitions, 454 flow [2024-06-04 16:07:16,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=454, PETRI_PLACES=68, PETRI_TRANSITIONS=69} [2024-06-04 16:07:16,006 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 25 predicate places. [2024-06-04 16:07:16,006 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 69 transitions, 454 flow [2024-06-04 16:07:16,006 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 16:07:16,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:16,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:16,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-04 16:07:16,007 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 16:07:16,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:16,007 INFO L85 PathProgramCache]: Analyzing trace with hash 334807972, now seen corresponding path program 1 times [2024-06-04 16:07:16,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:16,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428735075] [2024-06-04 16:07:16,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:16,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:16,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:16,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:07:16,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:16,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428735075] [2024-06-04 16:07:16,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428735075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:16,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:16,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:07:16,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815214673] [2024-06-04 16:07:16,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:16,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:07:16,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:16,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:07:16,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:07:16,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:16,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 69 transitions, 454 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:16,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:16,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:16,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:16,415 INFO L124 PetriNetUnfolderBase]: 970/1592 cut-off events. [2024-06-04 16:07:16,416 INFO L125 PetriNetUnfolderBase]: For 5493/5493 co-relation queries the response was YES. [2024-06-04 16:07:16,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6105 conditions, 1592 events. 970/1592 cut-off events. For 5493/5493 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8013 event pairs, 349 based on Foata normal form. 2/1592 useless extension candidates. Maximal degree in co-relation 6073. Up to 1396 conditions per place. [2024-06-04 16:07:16,426 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 64 selfloop transitions, 21 changer transitions 0/92 dead transitions. [2024-06-04 16:07:16,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 92 transitions, 725 flow [2024-06-04 16:07:16,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:07:16,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:07:16,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-04 16:07:16,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-04 16:07:16,431 INFO L175 Difference]: Start difference. First operand has 68 places, 69 transitions, 454 flow. Second operand 5 states and 130 transitions. [2024-06-04 16:07:16,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 92 transitions, 725 flow [2024-06-04 16:07:16,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 92 transitions, 695 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-04 16:07:16,437 INFO L231 Difference]: Finished difference. Result has 71 places, 72 transitions, 498 flow [2024-06-04 16:07:16,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=427, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=498, PETRI_PLACES=71, PETRI_TRANSITIONS=72} [2024-06-04 16:07:16,439 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 28 predicate places. [2024-06-04 16:07:16,439 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 72 transitions, 498 flow [2024-06-04 16:07:16,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:16,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:16,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:16,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-04 16:07:16,440 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 16:07:16,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:16,441 INFO L85 PathProgramCache]: Analyzing trace with hash -457682148, now seen corresponding path program 2 times [2024-06-04 16:07:16,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:16,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163243234] [2024-06-04 16:07:16,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:16,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:16,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:16,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:07:16,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:16,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163243234] [2024-06-04 16:07:16,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163243234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:16,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:16,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:07:16,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311865337] [2024-06-04 16:07:16,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:16,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:07:16,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:16,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:07:16,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:07:16,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:16,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 72 transitions, 498 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:16,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:16,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:16,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:16,812 INFO L124 PetriNetUnfolderBase]: 965/1581 cut-off events. [2024-06-04 16:07:16,813 INFO L125 PetriNetUnfolderBase]: For 6612/6616 co-relation queries the response was YES. [2024-06-04 16:07:16,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6200 conditions, 1581 events. 965/1581 cut-off events. For 6612/6616 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7974 event pairs, 360 based on Foata normal form. 6/1585 useless extension candidates. Maximal degree in co-relation 6166. Up to 1391 conditions per place. [2024-06-04 16:07:16,831 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 60 selfloop transitions, 21 changer transitions 0/88 dead transitions. [2024-06-04 16:07:16,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 88 transitions, 706 flow [2024-06-04 16:07:16,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:07:16,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:07:16,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-04 16:07:16,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5904761904761905 [2024-06-04 16:07:16,833 INFO L175 Difference]: Start difference. First operand has 71 places, 72 transitions, 498 flow. Second operand 5 states and 124 transitions. [2024-06-04 16:07:16,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 88 transitions, 706 flow [2024-06-04 16:07:16,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 88 transitions, 679 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-04 16:07:16,841 INFO L231 Difference]: Finished difference. Result has 74 places, 73 transitions, 529 flow [2024-06-04 16:07:16,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=529, PETRI_PLACES=74, PETRI_TRANSITIONS=73} [2024-06-04 16:07:16,842 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 31 predicate places. [2024-06-04 16:07:16,842 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 73 transitions, 529 flow [2024-06-04 16:07:16,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:16,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:16,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:16,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-04 16:07:16,843 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 16:07:16,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:16,844 INFO L85 PathProgramCache]: Analyzing trace with hash 549259432, now seen corresponding path program 1 times [2024-06-04 16:07:16,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:16,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458784600] [2024-06-04 16:07:16,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:16,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:16,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:17,045 INFO 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 16:07:17,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:17,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458784600] [2024-06-04 16:07:17,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458784600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:17,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:17,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:07:17,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305414077] [2024-06-04 16:07:17,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:17,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:07:17,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:17,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:07:17,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:07:17,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:17,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 73 transitions, 529 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:17,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:17,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:17,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:17,244 INFO L124 PetriNetUnfolderBase]: 957/1574 cut-off events. [2024-06-04 16:07:17,245 INFO L125 PetriNetUnfolderBase]: For 7572/7576 co-relation queries the response was YES. [2024-06-04 16:07:17,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6284 conditions, 1574 events. 957/1574 cut-off events. For 7572/7576 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7921 event pairs, 329 based on Foata normal form. 8/1581 useless extension candidates. Maximal degree in co-relation 6249. Up to 1417 conditions per place. [2024-06-04 16:07:17,255 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 73 selfloop transitions, 11 changer transitions 0/91 dead transitions. [2024-06-04 16:07:17,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 91 transitions, 751 flow [2024-06-04 16:07:17,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:07:17,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:07:17,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-04 16:07:17,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.580952380952381 [2024-06-04 16:07:17,256 INFO L175 Difference]: Start difference. First operand has 74 places, 73 transitions, 529 flow. Second operand 5 states and 122 transitions. [2024-06-04 16:07:17,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 91 transitions, 751 flow [2024-06-04 16:07:17,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 91 transitions, 723 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-04 16:07:17,265 INFO L231 Difference]: Finished difference. Result has 77 places, 75 transitions, 548 flow [2024-06-04 16:07:17,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=501, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=548, PETRI_PLACES=77, PETRI_TRANSITIONS=75} [2024-06-04 16:07:17,265 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 34 predicate places. [2024-06-04 16:07:17,265 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 75 transitions, 548 flow [2024-06-04 16:07:17,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:17,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:17,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:17,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-04 16:07:17,266 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 16:07:17,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:17,267 INFO L85 PathProgramCache]: Analyzing trace with hash 323701376, now seen corresponding path program 1 times [2024-06-04 16:07:17,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:17,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189577201] [2024-06-04 16:07:17,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:17,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:17,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:17,476 INFO 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 16:07:17,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:17,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189577201] [2024-06-04 16:07:17,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189577201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:17,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:17,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:07:17,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034325137] [2024-06-04 16:07:17,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:17,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:07:17,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:17,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:07:17,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:07:17,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:17,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 75 transitions, 548 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 16:07:17,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:17,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:17,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:17,734 INFO L124 PetriNetUnfolderBase]: 1012/1666 cut-off events. [2024-06-04 16:07:17,734 INFO L125 PetriNetUnfolderBase]: For 9208/9208 co-relation queries the response was YES. [2024-06-04 16:07:17,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6823 conditions, 1666 events. 1012/1666 cut-off events. For 9208/9208 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8490 event pairs, 273 based on Foata normal form. 4/1667 useless extension candidates. Maximal degree in co-relation 6786. Up to 1429 conditions per place. [2024-06-04 16:07:17,745 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 83 selfloop transitions, 29 changer transitions 0/119 dead transitions. [2024-06-04 16:07:17,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 119 transitions, 988 flow [2024-06-04 16:07:17,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:07:17,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:07:17,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-04 16:07:17,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-06-04 16:07:17,746 INFO L175 Difference]: Start difference. First operand has 77 places, 75 transitions, 548 flow. Second operand 7 states and 184 transitions. [2024-06-04 16:07:17,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 119 transitions, 988 flow [2024-06-04 16:07:17,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 119 transitions, 959 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-04 16:07:17,758 INFO L231 Difference]: Finished difference. Result has 82 places, 85 transitions, 669 flow [2024-06-04 16:07:17,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=519, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=669, PETRI_PLACES=82, PETRI_TRANSITIONS=85} [2024-06-04 16:07:17,758 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-04 16:07:17,758 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 85 transitions, 669 flow [2024-06-04 16:07:17,758 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 16:07:17,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:17,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:17,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-04 16:07:17,759 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 16:07:17,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:17,759 INFO L85 PathProgramCache]: Analyzing trace with hash 323821346, now seen corresponding path program 2 times [2024-06-04 16:07:17,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:17,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675897096] [2024-06-04 16:07:17,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:17,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:17,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:17,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:07:17,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:17,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675897096] [2024-06-04 16:07:17,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675897096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:17,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:17,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:07:17,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127811163] [2024-06-04 16:07:17,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:17,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:07:17,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:17,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:07:17,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:07:17,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:17,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 85 transitions, 669 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 16:07:17,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:17,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:17,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:18,189 INFO L124 PetriNetUnfolderBase]: 1023/1698 cut-off events. [2024-06-04 16:07:18,190 INFO L125 PetriNetUnfolderBase]: For 11568/11568 co-relation queries the response was YES. [2024-06-04 16:07:18,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7660 conditions, 1698 events. 1023/1698 cut-off events. For 11568/11568 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8674 event pairs, 311 based on Foata normal form. 2/1698 useless extension candidates. Maximal degree in co-relation 7621. Up to 1390 conditions per place. [2024-06-04 16:07:18,201 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 83 selfloop transitions, 32 changer transitions 0/122 dead transitions. [2024-06-04 16:07:18,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 122 transitions, 1119 flow [2024-06-04 16:07:18,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:07:18,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:07:18,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-04 16:07:18,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-04 16:07:18,203 INFO L175 Difference]: Start difference. First operand has 82 places, 85 transitions, 669 flow. Second operand 6 states and 153 transitions. [2024-06-04 16:07:18,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 122 transitions, 1119 flow [2024-06-04 16:07:18,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 122 transitions, 1043 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-04 16:07:18,215 INFO L231 Difference]: Finished difference. Result has 87 places, 97 transitions, 820 flow [2024-06-04 16:07:18,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=609, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=820, PETRI_PLACES=87, PETRI_TRANSITIONS=97} [2024-06-04 16:07:18,216 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 44 predicate places. [2024-06-04 16:07:18,216 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 97 transitions, 820 flow [2024-06-04 16:07:18,216 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 16:07:18,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:18,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:18,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-04 16:07:18,217 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 16:07:18,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:18,217 INFO L85 PathProgramCache]: Analyzing trace with hash -161414142, now seen corresponding path program 3 times [2024-06-04 16:07:18,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:18,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557784389] [2024-06-04 16:07:18,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:18,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:18,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:18,400 INFO 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 16:07:18,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:18,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557784389] [2024-06-04 16:07:18,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557784389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:18,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:18,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:07:18,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335497464] [2024-06-04 16:07:18,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:18,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:07:18,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:18,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:07:18,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:07:18,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:18,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 97 transitions, 820 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 16:07:18,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:18,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:18,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:18,606 INFO L124 PetriNetUnfolderBase]: 1018/1668 cut-off events. [2024-06-04 16:07:18,606 INFO L125 PetriNetUnfolderBase]: For 14135/14135 co-relation queries the response was YES. [2024-06-04 16:07:18,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8138 conditions, 1668 events. 1018/1668 cut-off events. For 14135/14135 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8484 event pairs, 337 based on Foata normal form. 2/1663 useless extension candidates. Maximal degree in co-relation 8095. Up to 1387 conditions per place. [2024-06-04 16:07:18,618 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 78 selfloop transitions, 36 changer transitions 0/121 dead transitions. [2024-06-04 16:07:18,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 121 transitions, 1184 flow [2024-06-04 16:07:18,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:07:18,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:07:18,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-04 16:07:18,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-04 16:07:18,619 INFO L175 Difference]: Start difference. First operand has 87 places, 97 transitions, 820 flow. Second operand 6 states and 149 transitions. [2024-06-04 16:07:18,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 121 transitions, 1184 flow [2024-06-04 16:07:18,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 121 transitions, 1148 flow, removed 14 selfloop flow, removed 1 redundant places. [2024-06-04 16:07:18,633 INFO L231 Difference]: Finished difference. Result has 92 places, 100 transitions, 902 flow [2024-06-04 16:07:18,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=786, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=902, PETRI_PLACES=92, PETRI_TRANSITIONS=100} [2024-06-04 16:07:18,634 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 49 predicate places. [2024-06-04 16:07:18,634 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 100 transitions, 902 flow [2024-06-04 16:07:18,634 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 16:07:18,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:18,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:18,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-04 16:07:18,635 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 16:07:18,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:18,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1188365619, now seen corresponding path program 1 times [2024-06-04 16:07:18,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:18,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726764336] [2024-06-04 16:07:18,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:18,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:18,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:18,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:07:18,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:18,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726764336] [2024-06-04 16:07:18,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726764336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:18,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:18,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:07:18,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157093001] [2024-06-04 16:07:18,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:18,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:07:18,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:18,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:07:18,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:07:18,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 16:07:18,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 100 transitions, 902 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 16:07:18,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:18,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 16:07:18,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:19,095 INFO L124 PetriNetUnfolderBase]: 923/1562 cut-off events. [2024-06-04 16:07:19,096 INFO L125 PetriNetUnfolderBase]: For 15403/15408 co-relation queries the response was YES. [2024-06-04 16:07:19,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7913 conditions, 1562 events. 923/1562 cut-off events. For 15403/15408 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 8096 event pairs, 312 based on Foata normal form. 8/1566 useless extension candidates. Maximal degree in co-relation 7868. Up to 1345 conditions per place. [2024-06-04 16:07:19,108 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 77 selfloop transitions, 18 changer transitions 0/109 dead transitions. [2024-06-04 16:07:19,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 109 transitions, 1127 flow [2024-06-04 16:07:19,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:07:19,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:07:19,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-06-04 16:07:19,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6130952380952381 [2024-06-04 16:07:19,109 INFO L175 Difference]: Start difference. First operand has 92 places, 100 transitions, 902 flow. Second operand 4 states and 103 transitions. [2024-06-04 16:07:19,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 109 transitions, 1127 flow [2024-06-04 16:07:19,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 109 transitions, 1061 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-04 16:07:19,123 INFO L231 Difference]: Finished difference. Result has 93 places, 100 transitions, 882 flow [2024-06-04 16:07:19,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=837, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=882, PETRI_PLACES=93, PETRI_TRANSITIONS=100} [2024-06-04 16:07:19,123 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 50 predicate places. [2024-06-04 16:07:19,124 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 100 transitions, 882 flow [2024-06-04 16:07:19,124 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 16:07:19,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:19,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:19,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-04 16:07:19,124 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:07:19,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:19,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1258647021, now seen corresponding path program 1 times [2024-06-04 16:07:19,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:19,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237237721] [2024-06-04 16:07:19,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:19,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:19,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:19,312 INFO 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 16:07:19,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:19,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237237721] [2024-06-04 16:07:19,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237237721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:19,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:19,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:07:19,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505872988] [2024-06-04 16:07:19,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:19,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:07:19,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:19,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:07:19,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:07:19,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:19,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 100 transitions, 882 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:19,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:19,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:19,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:19,604 INFO L124 PetriNetUnfolderBase]: 982/1633 cut-off events. [2024-06-04 16:07:19,604 INFO L125 PetriNetUnfolderBase]: For 16651/16651 co-relation queries the response was YES. [2024-06-04 16:07:19,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8167 conditions, 1633 events. 982/1633 cut-off events. For 16651/16651 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8315 event pairs, 302 based on Foata normal form. 4/1634 useless extension candidates. Maximal degree in co-relation 8120. Up to 1396 conditions per place. [2024-06-04 16:07:19,614 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 89 selfloop transitions, 35 changer transitions 0/131 dead transitions. [2024-06-04 16:07:19,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 131 transitions, 1224 flow [2024-06-04 16:07:19,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:07:19,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:07:19,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-04 16:07:19,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6156462585034014 [2024-06-04 16:07:19,615 INFO L175 Difference]: Start difference. First operand has 93 places, 100 transitions, 882 flow. Second operand 7 states and 181 transitions. [2024-06-04 16:07:19,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 131 transitions, 1224 flow [2024-06-04 16:07:19,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 131 transitions, 1172 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-04 16:07:19,628 INFO L231 Difference]: Finished difference. Result has 97 places, 100 transitions, 913 flow [2024-06-04 16:07:19,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=830, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=913, PETRI_PLACES=97, PETRI_TRANSITIONS=100} [2024-06-04 16:07:19,629 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 54 predicate places. [2024-06-04 16:07:19,629 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 100 transitions, 913 flow [2024-06-04 16:07:19,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:19,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:19,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:19,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-04 16:07:19,629 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:07:19,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:19,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1592418957, now seen corresponding path program 2 times [2024-06-04 16:07:19,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:19,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116217712] [2024-06-04 16:07:19,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:19,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:19,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:19,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:07:19,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:19,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116217712] [2024-06-04 16:07:19,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116217712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:19,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:19,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:07:19,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672807914] [2024-06-04 16:07:19,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:19,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:07:19,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:19,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:07:19,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:07:19,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:19,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 100 transitions, 913 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 16:07:19,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:19,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:19,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:20,077 INFO L124 PetriNetUnfolderBase]: 993/1656 cut-off events. [2024-06-04 16:07:20,078 INFO L125 PetriNetUnfolderBase]: For 18270/18270 co-relation queries the response was YES. [2024-06-04 16:07:20,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8456 conditions, 1656 events. 993/1656 cut-off events. For 18270/18270 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8420 event pairs, 306 based on Foata normal form. 2/1656 useless extension candidates. Maximal degree in co-relation 8409. Up to 1347 conditions per place. [2024-06-04 16:07:20,089 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 87 selfloop transitions, 37 changer transitions 0/131 dead transitions. [2024-06-04 16:07:20,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 131 transitions, 1323 flow [2024-06-04 16:07:20,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:07:20,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:07:20,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-04 16:07:20,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5918367346938775 [2024-06-04 16:07:20,090 INFO L175 Difference]: Start difference. First operand has 97 places, 100 transitions, 913 flow. Second operand 7 states and 174 transitions. [2024-06-04 16:07:20,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 131 transitions, 1323 flow [2024-06-04 16:07:20,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 131 transitions, 1253 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-04 16:07:20,112 INFO L231 Difference]: Finished difference. Result has 98 places, 103 transitions, 959 flow [2024-06-04 16:07:20,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=843, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=959, PETRI_PLACES=98, PETRI_TRANSITIONS=103} [2024-06-04 16:07:20,112 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-04 16:07:20,112 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 103 transitions, 959 flow [2024-06-04 16:07:20,113 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 16:07:20,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:20,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:20,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-04 16:07:20,113 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 16:07:20,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:20,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1454963851, now seen corresponding path program 3 times [2024-06-04 16:07:20,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:20,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756756003] [2024-06-04 16:07:20,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:20,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:20,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:20,273 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 16:07:20,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:20,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756756003] [2024-06-04 16:07:20,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756756003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:20,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:20,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:07:20,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782416976] [2024-06-04 16:07:20,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:20,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:07:20,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:20,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:07:20,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:07:20,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:20,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 103 transitions, 959 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:20,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:20,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:20,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:20,533 INFO L124 PetriNetUnfolderBase]: 1020/1705 cut-off events. [2024-06-04 16:07:20,533 INFO L125 PetriNetUnfolderBase]: For 20837/20837 co-relation queries the response was YES. [2024-06-04 16:07:20,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8885 conditions, 1705 events. 1020/1705 cut-off events. For 20837/20837 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8759 event pairs, 306 based on Foata normal form. 2/1705 useless extension candidates. Maximal degree in co-relation 8837. Up to 1376 conditions per place. [2024-06-04 16:07:20,548 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 85 selfloop transitions, 43 changer transitions 0/135 dead transitions. [2024-06-04 16:07:20,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 135 transitions, 1483 flow [2024-06-04 16:07:20,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:07:20,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:07:20,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-04 16:07:20,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6150793650793651 [2024-06-04 16:07:20,549 INFO L175 Difference]: Start difference. First operand has 98 places, 103 transitions, 959 flow. Second operand 6 states and 155 transitions. [2024-06-04 16:07:20,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 135 transitions, 1483 flow [2024-06-04 16:07:20,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 135 transitions, 1381 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-04 16:07:20,571 INFO L231 Difference]: Finished difference. Result has 99 places, 109 transitions, 1031 flow [2024-06-04 16:07:20,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=869, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1031, PETRI_PLACES=99, PETRI_TRANSITIONS=109} [2024-06-04 16:07:20,572 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 56 predicate places. [2024-06-04 16:07:20,572 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 109 transitions, 1031 flow [2024-06-04 16:07:20,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:20,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:20,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:20,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-04 16:07:20,572 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 16:07:20,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:20,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1592634283, now seen corresponding path program 1 times [2024-06-04 16:07:20,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:20,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337027915] [2024-06-04 16:07:20,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:20,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:20,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:20,759 INFO 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 16:07:20,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:20,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337027915] [2024-06-04 16:07:20,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337027915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:20,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:20,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:07:20,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764815417] [2024-06-04 16:07:20,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:20,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:07:20,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:20,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:07:20,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:07:20,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:20,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 109 transitions, 1031 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:20,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:20,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:20,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:21,042 INFO L124 PetriNetUnfolderBase]: 1037/1730 cut-off events. [2024-06-04 16:07:21,043 INFO L125 PetriNetUnfolderBase]: For 23067/23067 co-relation queries the response was YES. [2024-06-04 16:07:21,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9090 conditions, 1730 events. 1037/1730 cut-off events. For 23067/23067 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8883 event pairs, 302 based on Foata normal form. 4/1732 useless extension candidates. Maximal degree in co-relation 9041. Up to 1476 conditions per place. [2024-06-04 16:07:21,058 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 103 selfloop transitions, 24 changer transitions 0/134 dead transitions. [2024-06-04 16:07:21,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 134 transitions, 1363 flow [2024-06-04 16:07:21,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:07:21,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:07:21,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-04 16:07:21,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-04 16:07:21,060 INFO L175 Difference]: Start difference. First operand has 99 places, 109 transitions, 1031 flow. Second operand 6 states and 149 transitions. [2024-06-04 16:07:21,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 134 transitions, 1363 flow [2024-06-04 16:07:21,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 134 transitions, 1299 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-04 16:07:21,081 INFO L231 Difference]: Finished difference. Result has 103 places, 111 transitions, 1046 flow [2024-06-04 16:07:21,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=967, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1046, PETRI_PLACES=103, PETRI_TRANSITIONS=111} [2024-06-04 16:07:21,083 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 60 predicate places. [2024-06-04 16:07:21,083 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 111 transitions, 1046 flow [2024-06-04 16:07:21,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:21,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:21,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:21,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-04 16:07:21,083 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 16:07:21,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:21,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1745845573, now seen corresponding path program 4 times [2024-06-04 16:07:21,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:21,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566823821] [2024-06-04 16:07:21,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:21,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:21,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:21,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:07:21,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:21,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566823821] [2024-06-04 16:07:21,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566823821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:21,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:21,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:07:21,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466264558] [2024-06-04 16:07:21,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:21,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:07:21,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:21,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:07:21,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:07:21,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:21,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 111 transitions, 1046 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:21,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:21,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:21,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:21,518 INFO L124 PetriNetUnfolderBase]: 1032/1714 cut-off events. [2024-06-04 16:07:21,518 INFO L125 PetriNetUnfolderBase]: For 25204/25208 co-relation queries the response was YES. [2024-06-04 16:07:21,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9180 conditions, 1714 events. 1032/1714 cut-off events. For 25204/25208 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8867 event pairs, 334 based on Foata normal form. 6/1717 useless extension candidates. Maximal degree in co-relation 9130. Up to 1398 conditions per place. [2024-06-04 16:07:21,531 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 83 selfloop transitions, 43 changer transitions 0/133 dead transitions. [2024-06-04 16:07:21,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 133 transitions, 1433 flow [2024-06-04 16:07:21,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:07:21,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:07:21,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-04 16:07:21,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-04 16:07:21,532 INFO L175 Difference]: Start difference. First operand has 103 places, 111 transitions, 1046 flow. Second operand 6 states and 149 transitions. [2024-06-04 16:07:21,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 133 transitions, 1433 flow [2024-06-04 16:07:21,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 133 transitions, 1368 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-04 16:07:21,589 INFO L231 Difference]: Finished difference. Result has 105 places, 112 transitions, 1088 flow [2024-06-04 16:07:21,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=983, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1088, PETRI_PLACES=105, PETRI_TRANSITIONS=112} [2024-06-04 16:07:21,590 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 62 predicate places. [2024-06-04 16:07:21,590 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 112 transitions, 1088 flow [2024-06-04 16:07:21,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:21,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:21,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:21,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-04 16:07:21,590 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 16:07:21,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:21,590 INFO L85 PathProgramCache]: Analyzing trace with hash -711248397, now seen corresponding path program 5 times [2024-06-04 16:07:21,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:21,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023536389] [2024-06-04 16:07:21,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:21,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:21,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:21,762 INFO 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 16:07:21,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:21,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023536389] [2024-06-04 16:07:21,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023536389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:21,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:21,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:07:21,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707825998] [2024-06-04 16:07:21,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:21,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:07:21,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:21,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:07:21,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:07:21,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:21,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 112 transitions, 1088 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 16:07:21,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:21,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:21,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:22,028 INFO L124 PetriNetUnfolderBase]: 1027/1692 cut-off events. [2024-06-04 16:07:22,028 INFO L125 PetriNetUnfolderBase]: For 26983/26983 co-relation queries the response was YES. [2024-06-04 16:07:22,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9243 conditions, 1692 events. 1027/1692 cut-off events. For 26983/26983 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8631 event pairs, 338 based on Foata normal form. 2/1687 useless extension candidates. Maximal degree in co-relation 9192. Up to 1393 conditions per place. [2024-06-04 16:07:22,041 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 82 selfloop transitions, 46 changer transitions 0/135 dead transitions. [2024-06-04 16:07:22,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 135 transitions, 1402 flow [2024-06-04 16:07:22,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:07:22,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:07:22,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-04 16:07:22,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-04 16:07:22,042 INFO L175 Difference]: Start difference. First operand has 105 places, 112 transitions, 1088 flow. Second operand 7 states and 168 transitions. [2024-06-04 16:07:22,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 135 transitions, 1402 flow [2024-06-04 16:07:22,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 135 transitions, 1324 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-04 16:07:22,066 INFO L231 Difference]: Finished difference. Result has 109 places, 112 transitions, 1110 flow [2024-06-04 16:07:22,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1010, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1110, PETRI_PLACES=109, PETRI_TRANSITIONS=112} [2024-06-04 16:07:22,067 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 66 predicate places. [2024-06-04 16:07:22,067 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 112 transitions, 1110 flow [2024-06-04 16:07:22,067 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 16:07:22,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:22,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:22,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-04 16:07:22,067 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 16:07:22,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:22,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1314596383, now seen corresponding path program 2 times [2024-06-04 16:07:22,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:22,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794660527] [2024-06-04 16:07:22,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:22,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:22,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:22,244 INFO 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 16:07:22,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:22,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794660527] [2024-06-04 16:07:22,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794660527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:22,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:22,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:07:22,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057659942] [2024-06-04 16:07:22,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:22,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:07:22,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:22,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:07:22,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:07:22,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:22,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 112 transitions, 1110 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:22,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:22,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:22,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:22,493 INFO L124 PetriNetUnfolderBase]: 1044/1749 cut-off events. [2024-06-04 16:07:22,493 INFO L125 PetriNetUnfolderBase]: For 30022/30026 co-relation queries the response was YES. [2024-06-04 16:07:22,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9514 conditions, 1749 events. 1044/1749 cut-off events. For 30022/30026 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 9131 event pairs, 320 based on Foata normal form. 8/1755 useless extension candidates. Maximal degree in co-relation 9461. Up to 1489 conditions per place. [2024-06-04 16:07:22,506 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 104 selfloop transitions, 23 changer transitions 0/134 dead transitions. [2024-06-04 16:07:22,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 134 transitions, 1438 flow [2024-06-04 16:07:22,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:07:22,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:07:22,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-04 16:07:22,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5753968253968254 [2024-06-04 16:07:22,508 INFO L175 Difference]: Start difference. First operand has 109 places, 112 transitions, 1110 flow. Second operand 6 states and 145 transitions. [2024-06-04 16:07:22,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 134 transitions, 1438 flow [2024-06-04 16:07:22,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 134 transitions, 1336 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-04 16:07:22,532 INFO L231 Difference]: Finished difference. Result has 110 places, 114 transitions, 1089 flow [2024-06-04 16:07:22,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1008, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1089, PETRI_PLACES=110, PETRI_TRANSITIONS=114} [2024-06-04 16:07:22,533 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 67 predicate places. [2024-06-04 16:07:22,533 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 114 transitions, 1089 flow [2024-06-04 16:07:22,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:22,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:22,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:22,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-04 16:07:22,534 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 16:07:22,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:22,534 INFO L85 PathProgramCache]: Analyzing trace with hash -442630777, now seen corresponding path program 3 times [2024-06-04 16:07:22,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:22,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77432865] [2024-06-04 16:07:22,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:22,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:22,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:22,706 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 16:07:22,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:22,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77432865] [2024-06-04 16:07:22,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77432865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:22,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:22,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:07:22,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431863090] [2024-06-04 16:07:22,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:22,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:07:22,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:22,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:07:22,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:07:22,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:22,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 114 transitions, 1089 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:22,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:22,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:22,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:22,976 INFO L124 PetriNetUnfolderBase]: 1036/1737 cut-off events. [2024-06-04 16:07:22,976 INFO L125 PetriNetUnfolderBase]: For 31482/31486 co-relation queries the response was YES. [2024-06-04 16:07:22,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9514 conditions, 1737 events. 1036/1737 cut-off events. For 31482/31486 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9065 event pairs, 289 based on Foata normal form. 8/1743 useless extension candidates. Maximal degree in co-relation 9460. Up to 1418 conditions per place. [2024-06-04 16:07:22,989 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 102 selfloop transitions, 28 changer transitions 0/137 dead transitions. [2024-06-04 16:07:22,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 137 transitions, 1429 flow [2024-06-04 16:07:22,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:07:22,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:07:22,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-04 16:07:22,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-04 16:07:22,991 INFO L175 Difference]: Start difference. First operand has 110 places, 114 transitions, 1089 flow. Second operand 6 states and 146 transitions. [2024-06-04 16:07:22,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 137 transitions, 1429 flow [2024-06-04 16:07:23,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 137 transitions, 1366 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-04 16:07:23,017 INFO L231 Difference]: Finished difference. Result has 112 places, 116 transitions, 1121 flow [2024-06-04 16:07:23,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1026, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1121, PETRI_PLACES=112, PETRI_TRANSITIONS=116} [2024-06-04 16:07:23,017 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 69 predicate places. [2024-06-04 16:07:23,017 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 116 transitions, 1121 flow [2024-06-04 16:07:23,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:23,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:23,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:23,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-04 16:07:23,018 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:07:23,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:23,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1432334471, now seen corresponding path program 1 times [2024-06-04 16:07:23,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:23,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961807560] [2024-06-04 16:07:23,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:23,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:23,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:23,247 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 16:07:23,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:23,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961807560] [2024-06-04 16:07:23,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961807560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:23,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:23,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:07:23,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713281407] [2024-06-04 16:07:23,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:23,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:07:23,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:23,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:07:23,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:07:23,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:23,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 116 transitions, 1121 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 16:07:23,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:23,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:23,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:23,490 INFO L124 PetriNetUnfolderBase]: 1041/1745 cut-off events. [2024-06-04 16:07:23,490 INFO L125 PetriNetUnfolderBase]: For 32861/32861 co-relation queries the response was YES. [2024-06-04 16:07:23,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9758 conditions, 1745 events. 1041/1745 cut-off events. For 32861/32861 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8999 event pairs, 302 based on Foata normal form. 1/1744 useless extension candidates. Maximal degree in co-relation 9703. Up to 1555 conditions per place. [2024-06-04 16:07:23,504 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 111 selfloop transitions, 13 changer transitions 0/131 dead transitions. [2024-06-04 16:07:23,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 131 transitions, 1433 flow [2024-06-04 16:07:23,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:07:23,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:07:23,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-04 16:07:23,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5619047619047619 [2024-06-04 16:07:23,507 INFO L175 Difference]: Start difference. First operand has 112 places, 116 transitions, 1121 flow. Second operand 5 states and 118 transitions. [2024-06-04 16:07:23,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 131 transitions, 1433 flow [2024-06-04 16:07:23,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 131 transitions, 1356 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-04 16:07:23,537 INFO L231 Difference]: Finished difference. Result has 113 places, 119 transitions, 1116 flow [2024-06-04 16:07:23,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1044, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1116, PETRI_PLACES=113, PETRI_TRANSITIONS=119} [2024-06-04 16:07:23,538 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 70 predicate places. [2024-06-04 16:07:23,538 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 119 transitions, 1116 flow [2024-06-04 16:07:23,539 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 16:07:23,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:23,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:23,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-04 16:07:23,539 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 16:07:23,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:23,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1815378261, now seen corresponding path program 2 times [2024-06-04 16:07:23,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:23,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390319164] [2024-06-04 16:07:23,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:23,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:23,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:23,775 INFO 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 16:07:23,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:23,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390319164] [2024-06-04 16:07:23,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390319164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:23,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:23,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:07:23,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744411977] [2024-06-04 16:07:23,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:23,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:07:23,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:23,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:07:23,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:07:23,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:23,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 119 transitions, 1116 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 16:07:23,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:23,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:23,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:24,016 INFO L124 PetriNetUnfolderBase]: 1046/1747 cut-off events. [2024-06-04 16:07:24,016 INFO L125 PetriNetUnfolderBase]: For 34245/34245 co-relation queries the response was YES. [2024-06-04 16:07:24,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9942 conditions, 1747 events. 1046/1747 cut-off events. For 34245/34245 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9000 event pairs, 299 based on Foata normal form. 1/1747 useless extension candidates. Maximal degree in co-relation 9886. Up to 1555 conditions per place. [2024-06-04 16:07:24,030 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 116 selfloop transitions, 18 changer transitions 0/141 dead transitions. [2024-06-04 16:07:24,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 141 transitions, 1544 flow [2024-06-04 16:07:24,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:07:24,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:07:24,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-04 16:07:24,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5904761904761905 [2024-06-04 16:07:24,031 INFO L175 Difference]: Start difference. First operand has 113 places, 119 transitions, 1116 flow. Second operand 5 states and 124 transitions. [2024-06-04 16:07:24,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 141 transitions, 1544 flow [2024-06-04 16:07:24,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 141 transitions, 1494 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-04 16:07:24,062 INFO L231 Difference]: Finished difference. Result has 116 places, 125 transitions, 1202 flow [2024-06-04 16:07:24,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1066, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1202, PETRI_PLACES=116, PETRI_TRANSITIONS=125} [2024-06-04 16:07:24,063 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 73 predicate places. [2024-06-04 16:07:24,063 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 125 transitions, 1202 flow [2024-06-04 16:07:24,063 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 16:07:24,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:24,063 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 16:07:24,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-04 16:07:24,063 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:07:24,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:24,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1836556511, now seen corresponding path program 1 times [2024-06-04 16:07:24,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:24,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477603327] [2024-06-04 16:07:24,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:24,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:24,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:24,236 INFO 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 16:07:24,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:24,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477603327] [2024-06-04 16:07:24,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477603327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:24,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:24,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:07:24,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686526917] [2024-06-04 16:07:24,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:24,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:07:24,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:24,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:07:24,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:07:24,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:24,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 125 transitions, 1202 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 16:07:24,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:24,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:24,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:24,619 INFO L124 PetriNetUnfolderBase]: 1450/2395 cut-off events. [2024-06-04 16:07:24,619 INFO L125 PetriNetUnfolderBase]: For 63815/63815 co-relation queries the response was YES. [2024-06-04 16:07:24,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14707 conditions, 2395 events. 1450/2395 cut-off events. For 63815/63815 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13073 event pairs, 330 based on Foata normal form. 14/2406 useless extension candidates. Maximal degree in co-relation 14649. Up to 1444 conditions per place. [2024-06-04 16:07:24,641 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 132 selfloop transitions, 40 changer transitions 0/179 dead transitions. [2024-06-04 16:07:24,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 179 transitions, 1900 flow [2024-06-04 16:07:24,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:07:24,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:07:24,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-04 16:07:24,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6369047619047619 [2024-06-04 16:07:24,643 INFO L175 Difference]: Start difference. First operand has 116 places, 125 transitions, 1202 flow. Second operand 8 states and 214 transitions. [2024-06-04 16:07:24,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 179 transitions, 1900 flow [2024-06-04 16:07:24,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 179 transitions, 1854 flow, removed 20 selfloop flow, removed 1 redundant places. [2024-06-04 16:07:24,704 INFO L231 Difference]: Finished difference. Result has 124 places, 132 transitions, 1366 flow [2024-06-04 16:07:24,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1156, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1366, PETRI_PLACES=124, PETRI_TRANSITIONS=132} [2024-06-04 16:07:24,704 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 81 predicate places. [2024-06-04 16:07:24,705 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 132 transitions, 1366 flow [2024-06-04 16:07:24,705 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 16:07:24,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:24,705 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 16:07:24,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-04 16:07:24,706 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:07:24,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:24,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1866843391, now seen corresponding path program 2 times [2024-06-04 16:07:24,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:24,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95963345] [2024-06-04 16:07:24,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:24,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:24,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:24,889 INFO 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 16:07:24,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:24,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95963345] [2024-06-04 16:07:24,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95963345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:24,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:24,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:07:24,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891467635] [2024-06-04 16:07:24,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:24,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:07:24,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:24,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:07:24,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:07:24,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:24,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 132 transitions, 1366 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 16:07:24,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:24,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:24,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:25,285 INFO L124 PetriNetUnfolderBase]: 1419/2350 cut-off events. [2024-06-04 16:07:25,286 INFO L125 PetriNetUnfolderBase]: For 65353/65353 co-relation queries the response was YES. [2024-06-04 16:07:25,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14837 conditions, 2350 events. 1419/2350 cut-off events. For 65353/65353 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12803 event pairs, 419 based on Foata normal form. 14/2361 useless extension candidates. Maximal degree in co-relation 14776. Up to 2032 conditions per place. [2024-06-04 16:07:25,306 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 128 selfloop transitions, 38 changer transitions 0/173 dead transitions. [2024-06-04 16:07:25,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 173 transitions, 1872 flow [2024-06-04 16:07:25,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:07:25,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:07:25,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-04 16:07:25,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6130952380952381 [2024-06-04 16:07:25,308 INFO L175 Difference]: Start difference. First operand has 124 places, 132 transitions, 1366 flow. Second operand 8 states and 206 transitions. [2024-06-04 16:07:25,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 173 transitions, 1872 flow [2024-06-04 16:07:25,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 173 transitions, 1776 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-04 16:07:25,374 INFO L231 Difference]: Finished difference. Result has 128 places, 135 transitions, 1422 flow [2024-06-04 16:07:25,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1276, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1422, PETRI_PLACES=128, PETRI_TRANSITIONS=135} [2024-06-04 16:07:25,375 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 85 predicate places. [2024-06-04 16:07:25,375 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 135 transitions, 1422 flow [2024-06-04 16:07:25,375 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 16:07:25,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:25,376 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 16:07:25,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-04 16:07:25,376 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:07:25,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:25,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1982134561, now seen corresponding path program 3 times [2024-06-04 16:07:25,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:25,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672728630] [2024-06-04 16:07:25,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:25,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:25,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:25,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:07:25,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:25,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672728630] [2024-06-04 16:07:25,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672728630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:25,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:25,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:07:25,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109917359] [2024-06-04 16:07:25,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:25,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:07:25,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:25,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:07:25,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:07:25,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:25,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 135 transitions, 1422 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 16:07:25,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:25,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:25,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:25,894 INFO L124 PetriNetUnfolderBase]: 1436/2379 cut-off events. [2024-06-04 16:07:25,894 INFO L125 PetriNetUnfolderBase]: For 67704/67704 co-relation queries the response was YES. [2024-06-04 16:07:25,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15110 conditions, 2379 events. 1436/2379 cut-off events. For 67704/67704 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12957 event pairs, 423 based on Foata normal form. 4/2381 useless extension candidates. Maximal degree in co-relation 15047. Up to 2026 conditions per place. [2024-06-04 16:07:25,913 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 111 selfloop transitions, 46 changer transitions 0/164 dead transitions. [2024-06-04 16:07:25,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 164 transitions, 1848 flow [2024-06-04 16:07:25,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:07:25,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:07:25,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-04 16:07:25,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5850340136054422 [2024-06-04 16:07:25,915 INFO L175 Difference]: Start difference. First operand has 128 places, 135 transitions, 1422 flow. Second operand 7 states and 172 transitions. [2024-06-04 16:07:25,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 164 transitions, 1848 flow [2024-06-04 16:07:25,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 164 transitions, 1740 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-04 16:07:25,996 INFO L231 Difference]: Finished difference. Result has 129 places, 137 transitions, 1461 flow [2024-06-04 16:07:25,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1314, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1461, PETRI_PLACES=129, PETRI_TRANSITIONS=137} [2024-06-04 16:07:25,997 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-04 16:07:25,997 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 137 transitions, 1461 flow [2024-06-04 16:07:25,997 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 16:07:25,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:25,998 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 16:07:25,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-04 16:07:25,998 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:07:25,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:25,998 INFO L85 PathProgramCache]: Analyzing trace with hash -573867463, now seen corresponding path program 4 times [2024-06-04 16:07:25,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:25,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581402118] [2024-06-04 16:07:25,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:25,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:26,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:26,175 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 16:07:26,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:26,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581402118] [2024-06-04 16:07:26,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581402118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:26,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:26,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:07:26,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555762834] [2024-06-04 16:07:26,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:26,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:07:26,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:26,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:07:26,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:07:26,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:26,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 137 transitions, 1461 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 16:07:26,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:26,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:26,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:26,503 INFO L124 PetriNetUnfolderBase]: 1428/2340 cut-off events. [2024-06-04 16:07:26,503 INFO L125 PetriNetUnfolderBase]: For 70573/70573 co-relation queries the response was YES. [2024-06-04 16:07:26,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14885 conditions, 2340 events. 1428/2340 cut-off events. For 70573/70573 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12705 event pairs, 459 based on Foata normal form. 4/2336 useless extension candidates. Maximal degree in co-relation 14821. Up to 2014 conditions per place. [2024-06-04 16:07:26,523 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 108 selfloop transitions, 48 changer transitions 0/163 dead transitions. [2024-06-04 16:07:26,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 163 transitions, 1881 flow [2024-06-04 16:07:26,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:07:26,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:07:26,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-04 16:07:26,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-04 16:07:26,526 INFO L175 Difference]: Start difference. First operand has 129 places, 137 transitions, 1461 flow. Second operand 7 states and 168 transitions. [2024-06-04 16:07:26,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 163 transitions, 1881 flow [2024-06-04 16:07:26,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 163 transitions, 1752 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-04 16:07:26,600 INFO L231 Difference]: Finished difference. Result has 131 places, 139 transitions, 1487 flow [2024-06-04 16:07:26,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1332, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1487, PETRI_PLACES=131, PETRI_TRANSITIONS=139} [2024-06-04 16:07:26,601 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 88 predicate places. [2024-06-04 16:07:26,601 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 139 transitions, 1487 flow [2024-06-04 16:07:26,601 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 16:07:26,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:26,601 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 16:07:26,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-04 16:07:26,601 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 16:07:26,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:26,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1474138796, now seen corresponding path program 1 times [2024-06-04 16:07:26,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:26,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524017551] [2024-06-04 16:07:26,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:26,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:26,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:26,875 INFO 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 16:07:26,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:26,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524017551] [2024-06-04 16:07:26,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524017551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:26,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:26,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:07:26,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447887109] [2024-06-04 16:07:26,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:26,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:07:26,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:26,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:07:26,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:07:26,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:26,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 139 transitions, 1487 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:26,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:26,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:26,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:27,194 INFO L124 PetriNetUnfolderBase]: 1433/2377 cut-off events. [2024-06-04 16:07:27,195 INFO L125 PetriNetUnfolderBase]: For 73456/73460 co-relation queries the response was YES. [2024-06-04 16:07:27,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15091 conditions, 2377 events. 1433/2377 cut-off events. For 73456/73460 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 13022 event pairs, 416 based on Foata normal form. 5/2381 useless extension candidates. Maximal degree in co-relation 15026. Up to 2179 conditions per place. [2024-06-04 16:07:27,212 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 135 selfloop transitions, 12 changer transitions 0/154 dead transitions. [2024-06-04 16:07:27,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 154 transitions, 1853 flow [2024-06-04 16:07:27,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:07:27,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:07:27,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-04 16:07:27,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5619047619047619 [2024-06-04 16:07:27,213 INFO L175 Difference]: Start difference. First operand has 131 places, 139 transitions, 1487 flow. Second operand 5 states and 118 transitions. [2024-06-04 16:07:27,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 154 transitions, 1853 flow [2024-06-04 16:07:27,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 154 transitions, 1716 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-04 16:07:27,286 INFO L231 Difference]: Finished difference. Result has 131 places, 142 transitions, 1428 flow [2024-06-04 16:07:27,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1350, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1428, PETRI_PLACES=131, PETRI_TRANSITIONS=142} [2024-06-04 16:07:27,287 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 88 predicate places. [2024-06-04 16:07:27,287 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 142 transitions, 1428 flow [2024-06-04 16:07:27,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:27,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:27,288 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 16:07:27,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-04 16:07:27,288 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 16:07:27,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:27,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1452694708, now seen corresponding path program 2 times [2024-06-04 16:07:27,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:27,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746307579] [2024-06-04 16:07:27,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:27,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:27,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:27,532 INFO 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 16:07:27,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:27,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746307579] [2024-06-04 16:07:27,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746307579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:27,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:27,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:07:27,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856492205] [2024-06-04 16:07:27,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:27,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:07:27,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:27,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:07:27,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:07:27,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:27,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 142 transitions, 1428 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 16:07:27,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:27,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:27,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:27,873 INFO L124 PetriNetUnfolderBase]: 1430/2369 cut-off events. [2024-06-04 16:07:27,873 INFO L125 PetriNetUnfolderBase]: For 75744/75744 co-relation queries the response was YES. [2024-06-04 16:07:27,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15104 conditions, 2369 events. 1430/2369 cut-off events. For 75744/75744 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12974 event pairs, 416 based on Foata normal form. 1/2368 useless extension candidates. Maximal degree in co-relation 15038. Up to 2172 conditions per place. [2024-06-04 16:07:27,891 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 135 selfloop transitions, 16 changer transitions 0/158 dead transitions. [2024-06-04 16:07:27,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 158 transitions, 1810 flow [2024-06-04 16:07:27,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:07:27,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:07:27,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-04 16:07:27,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396825396825397 [2024-06-04 16:07:27,893 INFO L175 Difference]: Start difference. First operand has 131 places, 142 transitions, 1428 flow. Second operand 6 states and 136 transitions. [2024-06-04 16:07:27,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 158 transitions, 1810 flow [2024-06-04 16:07:27,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 158 transitions, 1754 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-04 16:07:27,969 INFO L231 Difference]: Finished difference. Result has 134 places, 145 transitions, 1464 flow [2024-06-04 16:07:27,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1372, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1464, PETRI_PLACES=134, PETRI_TRANSITIONS=145} [2024-06-04 16:07:27,970 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 91 predicate places. [2024-06-04 16:07:27,970 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 145 transitions, 1464 flow [2024-06-04 16:07:27,970 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 16:07:27,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:27,970 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 16:07:27,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-04 16:07:27,971 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 16:07:27,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:27,971 INFO L85 PathProgramCache]: Analyzing trace with hash 513206102, now seen corresponding path program 1 times [2024-06-04 16:07:27,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:27,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622046832] [2024-06-04 16:07:27,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:27,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:27,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:28,202 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 16:07:28,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:28,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622046832] [2024-06-04 16:07:28,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622046832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:28,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:28,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:07:28,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60861856] [2024-06-04 16:07:28,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:28,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:07:28,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:28,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:07:28,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:07:28,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:28,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 145 transitions, 1464 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:28,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:28,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:28,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:28,528 INFO L124 PetriNetUnfolderBase]: 1458/2421 cut-off events. [2024-06-04 16:07:28,528 INFO L125 PetriNetUnfolderBase]: For 83571/83571 co-relation queries the response was YES. [2024-06-04 16:07:28,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15833 conditions, 2421 events. 1458/2421 cut-off events. For 83571/83571 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 13390 event pairs, 424 based on Foata normal form. 2/2419 useless extension candidates. Maximal degree in co-relation 15766. Up to 2035 conditions per place. [2024-06-04 16:07:28,546 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 128 selfloop transitions, 48 changer transitions 0/183 dead transitions. [2024-06-04 16:07:28,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 183 transitions, 2334 flow [2024-06-04 16:07:28,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:07:28,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:07:28,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-04 16:07:28,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5505952380952381 [2024-06-04 16:07:28,548 INFO L175 Difference]: Start difference. First operand has 134 places, 145 transitions, 1464 flow. Second operand 8 states and 185 transitions. [2024-06-04 16:07:28,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 183 transitions, 2334 flow [2024-06-04 16:07:28,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 183 transitions, 2264 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-04 16:07:28,623 INFO L231 Difference]: Finished difference. Result has 140 places, 161 transitions, 1766 flow [2024-06-04 16:07:28,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1394, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1766, PETRI_PLACES=140, PETRI_TRANSITIONS=161} [2024-06-04 16:07:28,623 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 97 predicate places. [2024-06-04 16:07:28,623 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 161 transitions, 1766 flow [2024-06-04 16:07:28,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:28,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:28,624 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 16:07:28,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-04 16:07:28,624 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 16:07:28,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:28,625 INFO L85 PathProgramCache]: Analyzing trace with hash 517847546, now seen corresponding path program 3 times [2024-06-04 16:07:28,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:28,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260128612] [2024-06-04 16:07:28,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:28,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:28,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:28,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:07:28,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:28,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260128612] [2024-06-04 16:07:28,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260128612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:28,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:28,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:07:28,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841670295] [2024-06-04 16:07:28,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:28,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:07:28,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:28,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:07:28,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:07:28,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:28,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 161 transitions, 1766 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:28,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:28,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:28,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:29,174 INFO L124 PetriNetUnfolderBase]: 1455/2410 cut-off events. [2024-06-04 16:07:29,174 INFO L125 PetriNetUnfolderBase]: For 87813/87813 co-relation queries the response was YES. [2024-06-04 16:07:29,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16498 conditions, 2410 events. 1455/2410 cut-off events. For 87813/87813 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 13171 event pairs, 411 based on Foata normal form. 1/2410 useless extension candidates. Maximal degree in co-relation 16428. Up to 2204 conditions per place. [2024-06-04 16:07:29,193 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 151 selfloop transitions, 18 changer transitions 0/176 dead transitions. [2024-06-04 16:07:29,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 176 transitions, 2142 flow [2024-06-04 16:07:29,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:07:29,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:07:29,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-04 16:07:29,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-04 16:07:29,194 INFO L175 Difference]: Start difference. First operand has 140 places, 161 transitions, 1766 flow. Second operand 5 states and 123 transitions. [2024-06-04 16:07:29,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 176 transitions, 2142 flow [2024-06-04 16:07:29,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 176 transitions, 2013 flow, removed 51 selfloop flow, removed 2 redundant places. [2024-06-04 16:07:29,329 INFO L231 Difference]: Finished difference. Result has 143 places, 161 transitions, 1683 flow [2024-06-04 16:07:29,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1637, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1683, PETRI_PLACES=143, PETRI_TRANSITIONS=161} [2024-06-04 16:07:29,330 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 100 predicate places. [2024-06-04 16:07:29,330 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 161 transitions, 1683 flow [2024-06-04 16:07:29,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:29,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:29,330 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 16:07:29,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-04 16:07:29,330 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 16:07:29,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:29,331 INFO L85 PathProgramCache]: Analyzing trace with hash 237984916, now seen corresponding path program 2 times [2024-06-04 16:07:29,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:29,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138605851] [2024-06-04 16:07:29,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:29,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:29,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:29,526 INFO 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 16:07:29,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:29,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138605851] [2024-06-04 16:07:29,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138605851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:29,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:29,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:07:29,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744453457] [2024-06-04 16:07:29,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:29,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:07:29,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:29,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:07:29,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:07:29,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:29,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 161 transitions, 1683 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:29,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:29,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:29,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:29,889 INFO L124 PetriNetUnfolderBase]: 1526/2533 cut-off events. [2024-06-04 16:07:29,890 INFO L125 PetriNetUnfolderBase]: For 96915/96915 co-relation queries the response was YES. [2024-06-04 16:07:29,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17389 conditions, 2533 events. 1526/2533 cut-off events. For 96915/96915 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14179 event pairs, 431 based on Foata normal form. 3/2533 useless extension candidates. Maximal degree in co-relation 17317. Up to 2094 conditions per place. [2024-06-04 16:07:29,908 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 123 selfloop transitions, 70 changer transitions 0/200 dead transitions. [2024-06-04 16:07:29,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 200 transitions, 2576 flow [2024-06-04 16:07:29,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:07:29,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:07:29,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-04 16:07:29,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5816326530612245 [2024-06-04 16:07:29,911 INFO L175 Difference]: Start difference. First operand has 143 places, 161 transitions, 1683 flow. Second operand 7 states and 171 transitions. [2024-06-04 16:07:29,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 200 transitions, 2576 flow [2024-06-04 16:07:30,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 200 transitions, 2521 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-04 16:07:30,027 INFO L231 Difference]: Finished difference. Result has 147 places, 181 transitions, 2130 flow [2024-06-04 16:07:30,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1630, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2130, PETRI_PLACES=147, PETRI_TRANSITIONS=181} [2024-06-04 16:07:30,027 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 104 predicate places. [2024-06-04 16:07:30,027 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 181 transitions, 2130 flow [2024-06-04 16:07:30,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:30,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:30,028 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 16:07:30,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-04 16:07:30,028 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 16:07:30,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:30,028 INFO L85 PathProgramCache]: Analyzing trace with hash 222784996, now seen corresponding path program 3 times [2024-06-04 16:07:30,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:30,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981009428] [2024-06-04 16:07:30,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:30,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:30,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:30,255 INFO 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 16:07:30,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:30,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981009428] [2024-06-04 16:07:30,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981009428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:30,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:30,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:07:30,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363559317] [2024-06-04 16:07:30,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:30,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:07:30,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:30,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:07:30,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:07:30,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:30,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 181 transitions, 2130 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:30,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:30,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:30,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:30,633 INFO L124 PetriNetUnfolderBase]: 1519/2527 cut-off events. [2024-06-04 16:07:30,633 INFO L125 PetriNetUnfolderBase]: For 103352/103352 co-relation queries the response was YES. [2024-06-04 16:07:30,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18106 conditions, 2527 events. 1519/2527 cut-off events. For 103352/103352 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14199 event pairs, 432 based on Foata normal form. 3/2527 useless extension candidates. Maximal degree in co-relation 18032. Up to 2091 conditions per place. [2024-06-04 16:07:30,651 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 125 selfloop transitions, 74 changer transitions 0/206 dead transitions. [2024-06-04 16:07:30,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 206 transitions, 2854 flow [2024-06-04 16:07:30,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:07:30,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:07:30,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-04 16:07:30,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-04 16:07:30,652 INFO L175 Difference]: Start difference. First operand has 147 places, 181 transitions, 2130 flow. Second operand 6 states and 154 transitions. [2024-06-04 16:07:30,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 206 transitions, 2854 flow [2024-06-04 16:07:30,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 206 transitions, 2671 flow, removed 73 selfloop flow, removed 3 redundant places. [2024-06-04 16:07:30,764 INFO L231 Difference]: Finished difference. Result has 151 places, 187 transitions, 2282 flow [2024-06-04 16:07:30,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1965, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2282, PETRI_PLACES=151, PETRI_TRANSITIONS=187} [2024-06-04 16:07:30,764 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 108 predicate places. [2024-06-04 16:07:30,765 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 187 transitions, 2282 flow [2024-06-04 16:07:30,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:30,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:30,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:30,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-04 16:07:30,765 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 16:07:30,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:30,766 INFO L85 PathProgramCache]: Analyzing trace with hash 223031074, now seen corresponding path program 1 times [2024-06-04 16:07:30,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:30,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538657551] [2024-06-04 16:07:30,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:30,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:30,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:31,020 INFO 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 16:07:31,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:31,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538657551] [2024-06-04 16:07:31,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538657551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:31,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:31,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:07:31,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839528920] [2024-06-04 16:07:31,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:31,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:07:31,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:31,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:07:31,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:07:31,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 16:07:31,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 187 transitions, 2282 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 16:07:31,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:31,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 16:07:31,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:31,374 INFO L124 PetriNetUnfolderBase]: 1485/2501 cut-off events. [2024-06-04 16:07:31,374 INFO L125 PetriNetUnfolderBase]: For 113390/113390 co-relation queries the response was YES. [2024-06-04 16:07:31,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18075 conditions, 2501 events. 1485/2501 cut-off events. For 113390/113390 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14187 event pairs, 427 based on Foata normal form. 12/2505 useless extension candidates. Maximal degree in co-relation 17999. Up to 2109 conditions per place. [2024-06-04 16:07:31,393 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 155 selfloop transitions, 22 changer transitions 0/202 dead transitions. [2024-06-04 16:07:31,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 202 transitions, 2710 flow [2024-06-04 16:07:31,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:07:31,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:07:31,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-04 16:07:31,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-04 16:07:31,394 INFO L175 Difference]: Start difference. First operand has 151 places, 187 transitions, 2282 flow. Second operand 5 states and 125 transitions. [2024-06-04 16:07:31,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 202 transitions, 2710 flow [2024-06-04 16:07:31,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 202 transitions, 2573 flow, removed 35 selfloop flow, removed 2 redundant places. [2024-06-04 16:07:31,527 INFO L231 Difference]: Finished difference. Result has 154 places, 189 transitions, 2228 flow [2024-06-04 16:07:31,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2145, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2228, PETRI_PLACES=154, PETRI_TRANSITIONS=189} [2024-06-04 16:07:31,527 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-04 16:07:31,527 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 189 transitions, 2228 flow [2024-06-04 16:07:31,528 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 16:07:31,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:31,528 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 16:07:31,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-04 16:07:31,528 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:07:31,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:31,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1753294578, now seen corresponding path program 1 times [2024-06-04 16:07:31,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:31,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418964397] [2024-06-04 16:07:31,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:31,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:31,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:31,692 INFO 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 16:07:31,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:31,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418964397] [2024-06-04 16:07:31,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418964397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:31,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:31,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:07:31,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998167888] [2024-06-04 16:07:31,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:31,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:07:31,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:31,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:07:31,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:07:31,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:31,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 189 transitions, 2228 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 16:07:31,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:31,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:31,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:32,249 INFO L124 PetriNetUnfolderBase]: 1679/2817 cut-off events. [2024-06-04 16:07:32,249 INFO L125 PetriNetUnfolderBase]: For 136836/136836 co-relation queries the response was YES. [2024-06-04 16:07:32,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19575 conditions, 2817 events. 1679/2817 cut-off events. For 136836/136836 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 16101 event pairs, 327 based on Foata normal form. 42/2856 useless extension candidates. Maximal degree in co-relation 19498. Up to 1655 conditions per place. [2024-06-04 16:07:32,275 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 183 selfloop transitions, 44 changer transitions 5/239 dead transitions. [2024-06-04 16:07:32,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 239 transitions, 3043 flow [2024-06-04 16:07:32,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:07:32,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:07:32,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-04 16:07:32,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6398809523809523 [2024-06-04 16:07:32,276 INFO L175 Difference]: Start difference. First operand has 154 places, 189 transitions, 2228 flow. Second operand 8 states and 215 transitions. [2024-06-04 16:07:32,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 239 transitions, 3043 flow [2024-06-04 16:07:32,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 239 transitions, 2984 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-04 16:07:32,429 INFO L231 Difference]: Finished difference. Result has 159 places, 189 transitions, 2278 flow [2024-06-04 16:07:32,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2169, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2278, PETRI_PLACES=159, PETRI_TRANSITIONS=189} [2024-06-04 16:07:32,430 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 116 predicate places. [2024-06-04 16:07:32,430 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 189 transitions, 2278 flow [2024-06-04 16:07:32,430 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 16:07:32,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:32,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:32,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-04 16:07:32,431 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:07:32,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:32,431 INFO L85 PathProgramCache]: Analyzing trace with hash -537400354, now seen corresponding path program 2 times [2024-06-04 16:07:32,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:32,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920030514] [2024-06-04 16:07:32,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:32,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:32,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:32,600 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 16:07:32,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:32,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920030514] [2024-06-04 16:07:32,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920030514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:32,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:32,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:07:32,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254319785] [2024-06-04 16:07:32,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:32,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:07:32,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:32,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:07:32,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:07:32,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:32,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 189 transitions, 2278 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 16:07:32,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:32,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:32,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:33,045 INFO L124 PetriNetUnfolderBase]: 1534/2586 cut-off events. [2024-06-04 16:07:33,045 INFO L125 PetriNetUnfolderBase]: For 117394/117394 co-relation queries the response was YES. [2024-06-04 16:07:33,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17151 conditions, 2586 events. 1534/2586 cut-off events. For 117394/117394 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 14512 event pairs, 390 based on Foata normal form. 50/2633 useless extension candidates. Maximal degree in co-relation 17073. Up to 2021 conditions per place. [2024-06-04 16:07:33,063 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 184 selfloop transitions, 36 changer transitions 3/230 dead transitions. [2024-06-04 16:07:33,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 230 transitions, 2892 flow [2024-06-04 16:07:33,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:07:33,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:07:33,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-04 16:07:33,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6101190476190477 [2024-06-04 16:07:33,065 INFO L175 Difference]: Start difference. First operand has 159 places, 189 transitions, 2278 flow. Second operand 8 states and 205 transitions. [2024-06-04 16:07:33,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 230 transitions, 2892 flow [2024-06-04 16:07:33,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 230 transitions, 2771 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-04 16:07:33,201 INFO L231 Difference]: Finished difference. Result has 162 places, 189 transitions, 2251 flow [2024-06-04 16:07:33,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2168, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2251, PETRI_PLACES=162, PETRI_TRANSITIONS=189} [2024-06-04 16:07:33,202 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 119 predicate places. [2024-06-04 16:07:33,202 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 189 transitions, 2251 flow [2024-06-04 16:07:33,202 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 16:07:33,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:33,202 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 16:07:33,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-04 16:07:33,203 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:07:33,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:33,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1505598538, now seen corresponding path program 3 times [2024-06-04 16:07:33,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:33,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923837854] [2024-06-04 16:07:33,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:33,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:33,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:33,372 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 16:07:33,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:33,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923837854] [2024-06-04 16:07:33,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923837854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:33,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:33,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:07:33,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413828959] [2024-06-04 16:07:33,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:33,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:07:33,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:33,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:07:33,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:07:33,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:33,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 189 transitions, 2251 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 16:07:33,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:33,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:33,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:33,770 INFO L124 PetriNetUnfolderBase]: 1582/2680 cut-off events. [2024-06-04 16:07:33,771 INFO L125 PetriNetUnfolderBase]: For 100809/100809 co-relation queries the response was YES. [2024-06-04 16:07:33,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17442 conditions, 2680 events. 1582/2680 cut-off events. For 100809/100809 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 15231 event pairs, 411 based on Foata normal form. 16/2694 useless extension candidates. Maximal degree in co-relation 17363. Up to 2200 conditions per place. [2024-06-04 16:07:33,792 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 168 selfloop transitions, 45 changer transitions 0/220 dead transitions. [2024-06-04 16:07:33,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 220 transitions, 2801 flow [2024-06-04 16:07:33,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:07:33,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:07:33,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-04 16:07:33,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5918367346938775 [2024-06-04 16:07:33,794 INFO L175 Difference]: Start difference. First operand has 162 places, 189 transitions, 2251 flow. Second operand 7 states and 174 transitions. [2024-06-04 16:07:33,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 220 transitions, 2801 flow [2024-06-04 16:07:33,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 220 transitions, 2729 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-04 16:07:33,954 INFO L231 Difference]: Finished difference. Result has 163 places, 190 transitions, 2304 flow [2024-06-04 16:07:33,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2179, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2304, PETRI_PLACES=163, PETRI_TRANSITIONS=190} [2024-06-04 16:07:33,955 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 120 predicate places. [2024-06-04 16:07:33,955 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 190 transitions, 2304 flow [2024-06-04 16:07:33,955 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 16:07:33,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:33,955 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 16:07:33,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-04 16:07:33,956 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:07:33,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:33,956 INFO L85 PathProgramCache]: Analyzing trace with hash 459263530, now seen corresponding path program 4 times [2024-06-04 16:07:33,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:33,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321606316] [2024-06-04 16:07:33,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:33,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:33,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:34,127 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 16:07:34,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:34,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321606316] [2024-06-04 16:07:34,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321606316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:34,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:34,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:07:34,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730913548] [2024-06-04 16:07:34,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:34,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:07:34,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:34,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:07:34,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:07:34,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:34,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 190 transitions, 2304 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:34,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:34,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:34,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:34,553 INFO L124 PetriNetUnfolderBase]: 1640/2790 cut-off events. [2024-06-04 16:07:34,554 INFO L125 PetriNetUnfolderBase]: For 107475/107475 co-relation queries the response was YES. [2024-06-04 16:07:34,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18144 conditions, 2790 events. 1640/2790 cut-off events. For 107475/107475 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 16139 event pairs, 426 based on Foata normal form. 16/2804 useless extension candidates. Maximal degree in co-relation 18064. Up to 2298 conditions per place. [2024-06-04 16:07:34,575 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 173 selfloop transitions, 45 changer transitions 0/225 dead transitions. [2024-06-04 16:07:34,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 225 transitions, 2876 flow [2024-06-04 16:07:34,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:07:34,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:07:34,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-04 16:07:34,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5803571428571429 [2024-06-04 16:07:34,577 INFO L175 Difference]: Start difference. First operand has 163 places, 190 transitions, 2304 flow. Second operand 8 states and 195 transitions. [2024-06-04 16:07:34,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 225 transitions, 2876 flow [2024-06-04 16:07:34,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 225 transitions, 2769 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-04 16:07:34,767 INFO L231 Difference]: Finished difference. Result has 166 places, 191 transitions, 2324 flow [2024-06-04 16:07:34,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2197, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2324, PETRI_PLACES=166, PETRI_TRANSITIONS=191} [2024-06-04 16:07:34,767 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 123 predicate places. [2024-06-04 16:07:34,768 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 191 transitions, 2324 flow [2024-06-04 16:07:34,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:34,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:34,768 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 16:07:34,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-04 16:07:34,768 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:07:34,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:34,769 INFO L85 PathProgramCache]: Analyzing trace with hash -2138490898, now seen corresponding path program 5 times [2024-06-04 16:07:34,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:34,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969144319] [2024-06-04 16:07:34,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:34,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:34,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:34,945 INFO 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 16:07:34,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:34,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969144319] [2024-06-04 16:07:34,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969144319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:34,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:34,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:07:34,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276215861] [2024-06-04 16:07:34,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:34,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:07:34,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:34,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:07:34,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:07:34,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:34,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 191 transitions, 2324 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:34,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:34,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:34,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:35,343 INFO L124 PetriNetUnfolderBase]: 1681/2861 cut-off events. [2024-06-04 16:07:35,343 INFO L125 PetriNetUnfolderBase]: For 110285/110285 co-relation queries the response was YES. [2024-06-04 16:07:35,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18547 conditions, 2861 events. 1681/2861 cut-off events. For 110285/110285 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 16639 event pairs, 421 based on Foata normal form. 12/2871 useless extension candidates. Maximal degree in co-relation 18466. Up to 2282 conditions per place. [2024-06-04 16:07:35,365 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 178 selfloop transitions, 48 changer transitions 0/233 dead transitions. [2024-06-04 16:07:35,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 233 transitions, 2946 flow [2024-06-04 16:07:35,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:07:35,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:07:35,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-04 16:07:35,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5767195767195767 [2024-06-04 16:07:35,367 INFO L175 Difference]: Start difference. First operand has 166 places, 191 transitions, 2324 flow. Second operand 9 states and 218 transitions. [2024-06-04 16:07:35,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 233 transitions, 2946 flow [2024-06-04 16:07:35,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 233 transitions, 2837 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-04 16:07:35,515 INFO L231 Difference]: Finished difference. Result has 169 places, 192 transitions, 2349 flow [2024-06-04 16:07:35,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2215, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2349, PETRI_PLACES=169, PETRI_TRANSITIONS=192} [2024-06-04 16:07:35,515 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-04 16:07:35,515 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 192 transitions, 2349 flow [2024-06-04 16:07:35,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:35,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:35,516 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 16:07:35,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-04 16:07:35,516 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:07:35,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:35,516 INFO L85 PathProgramCache]: Analyzing trace with hash 928483080, now seen corresponding path program 1 times [2024-06-04 16:07:35,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:35,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654065790] [2024-06-04 16:07:35,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:35,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:35,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:35,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:07:35,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:35,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654065790] [2024-06-04 16:07:35,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654065790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:35,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:35,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:07:35,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759269137] [2024-06-04 16:07:35,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:35,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:07:35,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:35,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:07:35,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:07:35,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:35,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 192 transitions, 2349 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 16:07:35,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:35,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:35,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:36,121 INFO L124 PetriNetUnfolderBase]: 1808/3094 cut-off events. [2024-06-04 16:07:36,121 INFO L125 PetriNetUnfolderBase]: For 127797/127797 co-relation queries the response was YES. [2024-06-04 16:07:36,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20336 conditions, 3094 events. 1808/3094 cut-off events. For 127797/127797 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 18500 event pairs, 463 based on Foata normal form. 12/3104 useless extension candidates. Maximal degree in co-relation 20254. Up to 2183 conditions per place. [2024-06-04 16:07:36,145 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 172 selfloop transitions, 50 changer transitions 0/229 dead transitions. [2024-06-04 16:07:36,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 229 transitions, 3113 flow [2024-06-04 16:07:36,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:07:36,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:07:36,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-04 16:07:36,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6054421768707483 [2024-06-04 16:07:36,146 INFO L175 Difference]: Start difference. First operand has 169 places, 192 transitions, 2349 flow. Second operand 7 states and 178 transitions. [2024-06-04 16:07:36,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 229 transitions, 3113 flow [2024-06-04 16:07:36,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 229 transitions, 2993 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-04 16:07:36,309 INFO L231 Difference]: Finished difference. Result has 169 places, 194 transitions, 2401 flow [2024-06-04 16:07:36,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2229, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2401, PETRI_PLACES=169, PETRI_TRANSITIONS=194} [2024-06-04 16:07:36,309 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-04 16:07:36,309 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 194 transitions, 2401 flow [2024-06-04 16:07:36,310 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 16:07:36,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:36,310 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 16:07:36,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-04 16:07:36,310 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 16:07:36,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:36,310 INFO L85 PathProgramCache]: Analyzing trace with hash -689188672, now seen corresponding path program 1 times [2024-06-04 16:07:36,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:36,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694235383] [2024-06-04 16:07:36,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:36,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:36,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:36,495 INFO 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 16:07:36,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:36,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694235383] [2024-06-04 16:07:36,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694235383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:36,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:36,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:07:36,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473246596] [2024-06-04 16:07:36,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:36,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:07:36,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:36,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:07:36,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:07:36,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:36,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 194 transitions, 2401 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:36,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:36,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:36,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:36,933 INFO L124 PetriNetUnfolderBase]: 1837/3111 cut-off events. [2024-06-04 16:07:36,933 INFO L125 PetriNetUnfolderBase]: For 127612/127612 co-relation queries the response was YES. [2024-06-04 16:07:36,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20890 conditions, 3111 events. 1837/3111 cut-off events. For 127612/127612 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 18450 event pairs, 470 based on Foata normal form. 1/3110 useless extension candidates. Maximal degree in co-relation 20807. Up to 2635 conditions per place. [2024-06-04 16:07:36,961 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 149 selfloop transitions, 75 changer transitions 0/231 dead transitions. [2024-06-04 16:07:36,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 231 transitions, 3391 flow [2024-06-04 16:07:36,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:07:36,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:07:36,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-04 16:07:36,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-04 16:07:36,963 INFO L175 Difference]: Start difference. First operand has 169 places, 194 transitions, 2401 flow. Second operand 9 states and 210 transitions. [2024-06-04 16:07:36,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 231 transitions, 3391 flow [2024-06-04 16:07:37,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 231 transitions, 3308 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-04 16:07:37,173 INFO L231 Difference]: Finished difference. Result has 178 places, 206 transitions, 2797 flow [2024-06-04 16:07:37,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2318, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2797, PETRI_PLACES=178, PETRI_TRANSITIONS=206} [2024-06-04 16:07:37,174 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-04 16:07:37,174 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 206 transitions, 2797 flow [2024-06-04 16:07:37,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:37,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:37,180 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 16:07:37,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-04 16:07:37,180 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 16:07:37,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:37,181 INFO L85 PathProgramCache]: Analyzing trace with hash -683474752, now seen corresponding path program 2 times [2024-06-04 16:07:37,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:37,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734974727] [2024-06-04 16:07:37,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:37,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:37,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:37,388 INFO 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 16:07:37,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:37,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734974727] [2024-06-04 16:07:37,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734974727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:37,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:37,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:07:37,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659373127] [2024-06-04 16:07:37,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:37,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:07:37,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:37,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:07:37,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:07:37,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:37,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 206 transitions, 2797 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:37,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:37,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:37,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:37,952 INFO L124 PetriNetUnfolderBase]: 1858/3172 cut-off events. [2024-06-04 16:07:37,952 INFO L125 PetriNetUnfolderBase]: For 133388/133388 co-relation queries the response was YES. [2024-06-04 16:07:37,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21601 conditions, 3172 events. 1858/3172 cut-off events. For 133388/133388 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 18965 event pairs, 477 based on Foata normal form. 2/3171 useless extension candidates. Maximal degree in co-relation 21513. Up to 2783 conditions per place. [2024-06-04 16:07:37,982 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 184 selfloop transitions, 46 changer transitions 0/237 dead transitions. [2024-06-04 16:07:37,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 237 transitions, 3562 flow [2024-06-04 16:07:37,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:07:37,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:07:37,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-04 16:07:37,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.626984126984127 [2024-06-04 16:07:37,983 INFO L175 Difference]: Start difference. First operand has 178 places, 206 transitions, 2797 flow. Second operand 6 states and 158 transitions. [2024-06-04 16:07:37,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 237 transitions, 3562 flow [2024-06-04 16:07:38,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 237 transitions, 3360 flow, removed 63 selfloop flow, removed 4 redundant places. [2024-06-04 16:07:38,172 INFO L231 Difference]: Finished difference. Result has 181 places, 213 transitions, 2883 flow [2024-06-04 16:07:38,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2612, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2883, PETRI_PLACES=181, PETRI_TRANSITIONS=213} [2024-06-04 16:07:38,172 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 138 predicate places. [2024-06-04 16:07:38,173 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 213 transitions, 2883 flow [2024-06-04 16:07:38,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:38,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:38,173 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 16:07:38,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-04 16:07:38,173 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:07:38,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:38,174 INFO L85 PathProgramCache]: Analyzing trace with hash -480727646, now seen corresponding path program 6 times [2024-06-04 16:07:38,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:38,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687018242] [2024-06-04 16:07:38,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:38,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:38,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:38,332 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 16:07:38,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:38,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687018242] [2024-06-04 16:07:38,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687018242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:38,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:38,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:07:38,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016218823] [2024-06-04 16:07:38,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:38,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:07:38,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:38,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:07:38,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:07:38,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:38,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 213 transitions, 2883 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:38,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:38,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:38,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:38,879 INFO L124 PetriNetUnfolderBase]: 1830/3103 cut-off events. [2024-06-04 16:07:38,879 INFO L125 PetriNetUnfolderBase]: For 137157/137157 co-relation queries the response was YES. [2024-06-04 16:07:38,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20732 conditions, 3103 events. 1830/3103 cut-off events. For 137157/137157 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 18487 event pairs, 504 based on Foata normal form. 16/3111 useless extension candidates. Maximal degree in co-relation 20642. Up to 2599 conditions per place. [2024-06-04 16:07:38,902 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 188 selfloop transitions, 49 changer transitions 0/244 dead transitions. [2024-06-04 16:07:38,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 244 transitions, 3457 flow [2024-06-04 16:07:38,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:07:38,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:07:38,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-04 16:07:38,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684523809523809 [2024-06-04 16:07:38,907 INFO L175 Difference]: Start difference. First operand has 181 places, 213 transitions, 2883 flow. Second operand 8 states and 191 transitions. [2024-06-04 16:07:38,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 244 transitions, 3457 flow [2024-06-04 16:07:39,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 244 transitions, 3366 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-04 16:07:39,161 INFO L231 Difference]: Finished difference. Result has 185 places, 213 transitions, 2897 flow [2024-06-04 16:07:39,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2792, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2897, PETRI_PLACES=185, PETRI_TRANSITIONS=213} [2024-06-04 16:07:39,162 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 142 predicate places. [2024-06-04 16:07:39,162 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 213 transitions, 2897 flow [2024-06-04 16:07:39,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:39,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:39,162 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 16:07:39,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-04 16:07:39,163 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:07:39,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:39,163 INFO L85 PathProgramCache]: Analyzing trace with hash -480875516, now seen corresponding path program 7 times [2024-06-04 16:07:39,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:39,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639279871] [2024-06-04 16:07:39,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:39,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:39,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:39,333 INFO 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 16:07:39,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:39,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639279871] [2024-06-04 16:07:39,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639279871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:39,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:39,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:07:39,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942198893] [2024-06-04 16:07:39,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:39,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:07:39,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:39,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:07:39,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:07:39,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:39,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 213 transitions, 2897 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:39,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:39,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:39,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:39,875 INFO L124 PetriNetUnfolderBase]: 1871/3174 cut-off events. [2024-06-04 16:07:39,875 INFO L125 PetriNetUnfolderBase]: For 141016/141016 co-relation queries the response was YES. [2024-06-04 16:07:39,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21224 conditions, 3174 events. 1871/3174 cut-off events. For 141016/141016 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 19013 event pairs, 499 based on Foata normal form. 12/3178 useless extension candidates. Maximal degree in co-relation 21133. Up to 2583 conditions per place. [2024-06-04 16:07:39,903 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 193 selfloop transitions, 52 changer transitions 0/252 dead transitions. [2024-06-04 16:07:39,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 252 transitions, 3553 flow [2024-06-04 16:07:39,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:07:39,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:07:39,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-04 16:07:39,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5661375661375662 [2024-06-04 16:07:39,905 INFO L175 Difference]: Start difference. First operand has 185 places, 213 transitions, 2897 flow. Second operand 9 states and 214 transitions. [2024-06-04 16:07:39,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 252 transitions, 3553 flow [2024-06-04 16:07:40,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 252 transitions, 3450 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-04 16:07:40,130 INFO L231 Difference]: Finished difference. Result has 188 places, 214 transitions, 2940 flow [2024-06-04 16:07:40,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2794, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2940, PETRI_PLACES=188, PETRI_TRANSITIONS=214} [2024-06-04 16:07:40,130 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 145 predicate places. [2024-06-04 16:07:40,131 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 214 transitions, 2940 flow [2024-06-04 16:07:40,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:40,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:40,131 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 16:07:40,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-04 16:07:40,131 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:07:40,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:40,132 INFO L85 PathProgramCache]: Analyzing trace with hash -614329088, now seen corresponding path program 8 times [2024-06-04 16:07:40,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:40,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930979755] [2024-06-04 16:07:40,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:40,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:40,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:40,294 INFO 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 16:07:40,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:40,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930979755] [2024-06-04 16:07:40,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930979755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:40,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:40,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:07:40,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760046972] [2024-06-04 16:07:40,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:40,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:07:40,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:40,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:07:40,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:07:40,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:40,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 214 transitions, 2940 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 16:07:40,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:40,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:40,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:40,748 INFO L124 PetriNetUnfolderBase]: 1904/3251 cut-off events. [2024-06-04 16:07:40,749 INFO L125 PetriNetUnfolderBase]: For 148567/148571 co-relation queries the response was YES. [2024-06-04 16:07:40,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21516 conditions, 3251 events. 1904/3251 cut-off events. For 148567/148571 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 19696 event pairs, 514 based on Foata normal form. 20/3268 useless extension candidates. Maximal degree in co-relation 21424. Up to 2729 conditions per place. [2024-06-04 16:07:40,777 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 189 selfloop transitions, 46 changer transitions 0/242 dead transitions. [2024-06-04 16:07:40,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 242 transitions, 3536 flow [2024-06-04 16:07:40,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:07:40,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:07:40,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-04 16:07:40,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2024-06-04 16:07:40,778 INFO L175 Difference]: Start difference. First operand has 188 places, 214 transitions, 2940 flow. Second operand 7 states and 170 transitions. [2024-06-04 16:07:40,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 242 transitions, 3536 flow [2024-06-04 16:07:41,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 242 transitions, 3404 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-04 16:07:41,037 INFO L231 Difference]: Finished difference. Result has 188 places, 215 transitions, 2945 flow [2024-06-04 16:07:41,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2808, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2945, PETRI_PLACES=188, PETRI_TRANSITIONS=215} [2024-06-04 16:07:41,037 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 145 predicate places. [2024-06-04 16:07:41,038 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 215 transitions, 2945 flow [2024-06-04 16:07:41,038 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 16:07:41,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:41,038 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 16:07:41,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-04 16:07:41,038 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:07:41,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:41,039 INFO L85 PathProgramCache]: Analyzing trace with hash -728240538, now seen corresponding path program 2 times [2024-06-04 16:07:41,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:41,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746690676] [2024-06-04 16:07:41,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:41,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:41,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:41,188 INFO 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 16:07:41,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:41,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746690676] [2024-06-04 16:07:41,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746690676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:41,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:41,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:07:41,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96158333] [2024-06-04 16:07:41,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:41,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:07:41,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:41,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:07:41,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:07:41,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:41,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 215 transitions, 2945 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 16:07:41,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:41,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:41,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:41,684 INFO L124 PetriNetUnfolderBase]: 1945/3332 cut-off events. [2024-06-04 16:07:41,684 INFO L125 PetriNetUnfolderBase]: For 151216/151220 co-relation queries the response was YES. [2024-06-04 16:07:41,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21869 conditions, 3332 events. 1945/3332 cut-off events. For 151216/151220 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 20371 event pairs, 514 based on Foata normal form. 16/3345 useless extension candidates. Maximal degree in co-relation 21776. Up to 2713 conditions per place. [2024-06-04 16:07:41,711 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 191 selfloop transitions, 48 changer transitions 0/246 dead transitions. [2024-06-04 16:07:41,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 246 transitions, 3565 flow [2024-06-04 16:07:41,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:07:41,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:07:41,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-04 16:07:41,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-04 16:07:41,712 INFO L175 Difference]: Start difference. First operand has 188 places, 215 transitions, 2945 flow. Second operand 7 states and 173 transitions. [2024-06-04 16:07:41,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 246 transitions, 3565 flow [2024-06-04 16:07:42,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 246 transitions, 3446 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-04 16:07:42,009 INFO L231 Difference]: Finished difference. Result has 190 places, 216 transitions, 2968 flow [2024-06-04 16:07:42,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2826, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2968, PETRI_PLACES=190, PETRI_TRANSITIONS=216} [2024-06-04 16:07:42,009 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 147 predicate places. [2024-06-04 16:07:42,009 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 216 transitions, 2968 flow [2024-06-04 16:07:42,010 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 16:07:42,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:42,010 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 16:07:42,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-04 16:07:42,010 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:07:42,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:42,010 INFO L85 PathProgramCache]: Analyzing trace with hash -166379930, now seen corresponding path program 3 times [2024-06-04 16:07:42,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:42,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915634137] [2024-06-04 16:07:42,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:42,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:42,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:42,153 INFO 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 16:07:42,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:42,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915634137] [2024-06-04 16:07:42,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915634137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:42,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:42,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:07:42,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737605403] [2024-06-04 16:07:42,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:42,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:07:42,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:42,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:07:42,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:07:42,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:42,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 216 transitions, 2968 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 16:07:42,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:42,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:42,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:42,662 INFO L124 PetriNetUnfolderBase]: 1925/3300 cut-off events. [2024-06-04 16:07:42,663 INFO L125 PetriNetUnfolderBase]: For 144076/144080 co-relation queries the response was YES. [2024-06-04 16:07:42,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21114 conditions, 3300 events. 1925/3300 cut-off events. For 144076/144080 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 20153 event pairs, 459 based on Foata normal form. 16/3313 useless extension candidates. Maximal degree in co-relation 21020. Up to 2111 conditions per place. [2024-06-04 16:07:42,687 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 182 selfloop transitions, 57 changer transitions 0/246 dead transitions. [2024-06-04 16:07:42,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 246 transitions, 3480 flow [2024-06-04 16:07:42,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:07:42,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:07:42,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-04 16:07:42,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5850340136054422 [2024-06-04 16:07:42,688 INFO L175 Difference]: Start difference. First operand has 190 places, 216 transitions, 2968 flow. Second operand 7 states and 172 transitions. [2024-06-04 16:07:42,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 246 transitions, 3480 flow [2024-06-04 16:07:42,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 246 transitions, 3338 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-04 16:07:42,953 INFO L231 Difference]: Finished difference. Result has 190 places, 215 transitions, 2872 flow [2024-06-04 16:07:42,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2754, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2872, PETRI_PLACES=190, PETRI_TRANSITIONS=215} [2024-06-04 16:07:42,954 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 147 predicate places. [2024-06-04 16:07:42,954 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 215 transitions, 2872 flow [2024-06-04 16:07:42,954 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 16:07:42,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:42,954 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 16:07:42,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-04 16:07:42,954 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 16:07:42,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:42,955 INFO L85 PathProgramCache]: Analyzing trace with hash 596734886, now seen corresponding path program 3 times [2024-06-04 16:07:42,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:42,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387957704] [2024-06-04 16:07:42,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:42,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:42,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:43,146 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 16:07:43,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:43,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387957704] [2024-06-04 16:07:43,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387957704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:43,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:43,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:07:43,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20595265] [2024-06-04 16:07:43,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:43,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:07:43,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:43,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:07:43,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:07:43,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:43,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 215 transitions, 2872 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 16:07:43,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:43,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:43,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:43,678 INFO L124 PetriNetUnfolderBase]: 1930/3293 cut-off events. [2024-06-04 16:07:43,678 INFO L125 PetriNetUnfolderBase]: For 128073/128073 co-relation queries the response was YES. [2024-06-04 16:07:43,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20928 conditions, 3293 events. 1930/3293 cut-off events. For 128073/128073 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 19990 event pairs, 500 based on Foata normal form. 1/3289 useless extension candidates. Maximal degree in co-relation 20834. Up to 2931 conditions per place. [2024-06-04 16:07:43,707 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 189 selfloop transitions, 41 changer transitions 0/237 dead transitions. [2024-06-04 16:07:43,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 237 transitions, 3535 flow [2024-06-04 16:07:43,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:07:43,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:07:43,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-04 16:07:43,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-04 16:07:43,708 INFO L175 Difference]: Start difference. First operand has 190 places, 215 transitions, 2872 flow. Second operand 8 states and 180 transitions. [2024-06-04 16:07:43,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 237 transitions, 3535 flow [2024-06-04 16:07:44,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 237 transitions, 3348 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-04 16:07:44,014 INFO L231 Difference]: Finished difference. Result has 191 places, 218 transitions, 2838 flow [2024-06-04 16:07:44,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2685, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2838, PETRI_PLACES=191, PETRI_TRANSITIONS=218} [2024-06-04 16:07:44,015 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-04 16:07:44,015 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 218 transitions, 2838 flow [2024-06-04 16:07:44,015 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 16:07:44,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:44,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:44,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-04 16:07:44,015 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 16:07:44,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:44,016 INFO L85 PathProgramCache]: Analyzing trace with hash -215092072, now seen corresponding path program 4 times [2024-06-04 16:07:44,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:44,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977196843] [2024-06-04 16:07:44,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:44,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:44,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:44,233 INFO 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 16:07:44,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:44,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977196843] [2024-06-04 16:07:44,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977196843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:44,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:44,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:07:44,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696799823] [2024-06-04 16:07:44,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:44,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:07:44,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:44,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:07:44,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:07:44,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:44,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 218 transitions, 2838 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:44,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:44,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:44,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:44,749 INFO L124 PetriNetUnfolderBase]: 1922/3276 cut-off events. [2024-06-04 16:07:44,749 INFO L125 PetriNetUnfolderBase]: For 127386/127386 co-relation queries the response was YES. [2024-06-04 16:07:44,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20296 conditions, 3276 events. 1922/3276 cut-off events. For 127386/127386 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 19802 event pairs, 495 based on Foata normal form. 2/3273 useless extension candidates. Maximal degree in co-relation 20203. Up to 2779 conditions per place. [2024-06-04 16:07:44,779 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 152 selfloop transitions, 76 changer transitions 0/235 dead transitions. [2024-06-04 16:07:44,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 235 transitions, 3522 flow [2024-06-04 16:07:44,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:07:44,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:07:44,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-04 16:07:44,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5446428571428571 [2024-06-04 16:07:44,780 INFO L175 Difference]: Start difference. First operand has 191 places, 218 transitions, 2838 flow. Second operand 8 states and 183 transitions. [2024-06-04 16:07:44,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 235 transitions, 3522 flow [2024-06-04 16:07:45,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 235 transitions, 3340 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-04 16:07:45,044 INFO L231 Difference]: Finished difference. Result has 192 places, 218 transitions, 2816 flow [2024-06-04 16:07:45,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2656, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2816, PETRI_PLACES=192, PETRI_TRANSITIONS=218} [2024-06-04 16:07:45,045 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 149 predicate places. [2024-06-04 16:07:45,045 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 218 transitions, 2816 flow [2024-06-04 16:07:45,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:45,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:45,045 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 16:07:45,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-04 16:07:45,046 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 16:07:45,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:45,046 INFO L85 PathProgramCache]: Analyzing trace with hash 981017752, now seen corresponding path program 5 times [2024-06-04 16:07:45,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:45,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996940935] [2024-06-04 16:07:45,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:45,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:45,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:45,249 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 16:07:45,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:45,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996940935] [2024-06-04 16:07:45,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996940935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:45,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:45,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:07:45,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776966908] [2024-06-04 16:07:45,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:45,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:07:45,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:45,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:07:45,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:07:45,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:45,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 218 transitions, 2816 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:45,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:45,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:45,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:45,715 INFO L124 PetriNetUnfolderBase]: 1914/3268 cut-off events. [2024-06-04 16:07:45,715 INFO L125 PetriNetUnfolderBase]: For 128570/128570 co-relation queries the response was YES. [2024-06-04 16:07:45,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20164 conditions, 3268 events. 1914/3268 cut-off events. For 128570/128570 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 19806 event pairs, 497 based on Foata normal form. 2/3267 useless extension candidates. Maximal degree in co-relation 20071. Up to 2773 conditions per place. [2024-06-04 16:07:45,741 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 151 selfloop transitions, 81 changer transitions 0/239 dead transitions. [2024-06-04 16:07:45,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 239 transitions, 3445 flow [2024-06-04 16:07:45,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:07:45,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:07:45,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-04 16:07:45,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6150793650793651 [2024-06-04 16:07:45,742 INFO L175 Difference]: Start difference. First operand has 192 places, 218 transitions, 2816 flow. Second operand 6 states and 155 transitions. [2024-06-04 16:07:45,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 239 transitions, 3445 flow [2024-06-04 16:07:46,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 239 transitions, 3269 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-04 16:07:46,067 INFO L231 Difference]: Finished difference. Result has 192 places, 218 transitions, 2817 flow [2024-06-04 16:07:46,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2642, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2817, PETRI_PLACES=192, PETRI_TRANSITIONS=218} [2024-06-04 16:07:46,068 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 149 predicate places. [2024-06-04 16:07:46,068 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 218 transitions, 2817 flow [2024-06-04 16:07:46,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:46,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:46,068 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 16:07:46,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-04 16:07:46,069 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 16:07:46,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:46,069 INFO L85 PathProgramCache]: Analyzing trace with hash -218802059, now seen corresponding path program 1 times [2024-06-04 16:07:46,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:46,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827235698] [2024-06-04 16:07:46,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:46,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:46,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:46,257 INFO 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 16:07:46,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:46,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827235698] [2024-06-04 16:07:46,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827235698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:46,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:46,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:07:46,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848748232] [2024-06-04 16:07:46,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:46,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:07:46,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:46,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:07:46,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:07:46,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:46,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 218 transitions, 2817 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:46,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:46,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:46,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:46,713 INFO L124 PetriNetUnfolderBase]: 1942/3322 cut-off events. [2024-06-04 16:07:46,713 INFO L125 PetriNetUnfolderBase]: For 136397/136401 co-relation queries the response was YES. [2024-06-04 16:07:46,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20686 conditions, 3322 events. 1942/3322 cut-off events. For 136397/136401 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 20179 event pairs, 490 based on Foata normal form. 6/3326 useless extension candidates. Maximal degree in co-relation 20592. Up to 2802 conditions per place. [2024-06-04 16:07:46,741 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 159 selfloop transitions, 78 changer transitions 0/244 dead transitions. [2024-06-04 16:07:46,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 244 transitions, 3684 flow [2024-06-04 16:07:46,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:07:46,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:07:46,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-04 16:07:46,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5446428571428571 [2024-06-04 16:07:46,742 INFO L175 Difference]: Start difference. First operand has 192 places, 218 transitions, 2817 flow. Second operand 8 states and 183 transitions. [2024-06-04 16:07:46,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 244 transitions, 3684 flow [2024-06-04 16:07:46,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 244 transitions, 3461 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-04 16:07:46,992 INFO L231 Difference]: Finished difference. Result has 194 places, 227 transitions, 2930 flow [2024-06-04 16:07:46,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2594, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2930, PETRI_PLACES=194, PETRI_TRANSITIONS=227} [2024-06-04 16:07:46,992 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-04 16:07:46,992 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 227 transitions, 2930 flow [2024-06-04 16:07:46,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:46,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:46,992 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 16:07:46,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-04 16:07:46,993 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 16:07:46,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:46,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1446632379, now seen corresponding path program 2 times [2024-06-04 16:07:46,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:46,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550998377] [2024-06-04 16:07:46,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:46,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:46,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:47,199 INFO 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 16:07:47,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:47,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550998377] [2024-06-04 16:07:47,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550998377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:47,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:47,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:07:47,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029562989] [2024-06-04 16:07:47,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:47,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:07:47,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:47,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:07:47,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:07:47,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:47,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 227 transitions, 2930 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 16:07:47,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:47,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:47,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:47,656 INFO L124 PetriNetUnfolderBase]: 1954/3333 cut-off events. [2024-06-04 16:07:47,657 INFO L125 PetriNetUnfolderBase]: For 141053/141053 co-relation queries the response was YES. [2024-06-04 16:07:47,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20918 conditions, 3333 events. 1954/3333 cut-off events. For 141053/141053 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 20268 event pairs, 496 based on Foata normal form. 2/3330 useless extension candidates. Maximal degree in co-relation 20823. Up to 2931 conditions per place. [2024-06-04 16:07:47,685 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 190 selfloop transitions, 49 changer transitions 0/246 dead transitions. [2024-06-04 16:07:47,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 246 transitions, 3623 flow [2024-06-04 16:07:47,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:07:47,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:07:47,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-04 16:07:47,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-04 16:07:47,686 INFO L175 Difference]: Start difference. First operand has 194 places, 227 transitions, 2930 flow. Second operand 7 states and 161 transitions. [2024-06-04 16:07:47,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 246 transitions, 3623 flow [2024-06-04 16:07:47,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 246 transitions, 3448 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-04 16:07:47,955 INFO L231 Difference]: Finished difference. Result has 197 places, 231 transitions, 2942 flow [2024-06-04 16:07:47,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2762, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2942, PETRI_PLACES=197, PETRI_TRANSITIONS=231} [2024-06-04 16:07:47,955 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 154 predicate places. [2024-06-04 16:07:47,955 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 231 transitions, 2942 flow [2024-06-04 16:07:47,956 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 16:07:47,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:47,956 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 16:07:47,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-04 16:07:47,956 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 16:07:47,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:47,956 INFO L85 PathProgramCache]: Analyzing trace with hash -215077409, now seen corresponding path program 3 times [2024-06-04 16:07:47,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:47,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537095496] [2024-06-04 16:07:47,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:47,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:47,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:48,144 INFO 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 16:07:48,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:48,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537095496] [2024-06-04 16:07:48,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537095496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:48,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:48,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:07:48,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902408845] [2024-06-04 16:07:48,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:48,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:07:48,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:48,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:07:48,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:07:48,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:48,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 231 transitions, 2942 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:48,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:48,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:48,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:48,657 INFO L124 PetriNetUnfolderBase]: 1948/3325 cut-off events. [2024-06-04 16:07:48,657 INFO L125 PetriNetUnfolderBase]: For 143292/143292 co-relation queries the response was YES. [2024-06-04 16:07:48,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20623 conditions, 3325 events. 1948/3325 cut-off events. For 143292/143292 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 20211 event pairs, 494 based on Foata normal form. 2/3322 useless extension candidates. Maximal degree in co-relation 20528. Up to 2810 conditions per place. [2024-06-04 16:07:48,681 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 152 selfloop transitions, 92 changer transitions 0/251 dead transitions. [2024-06-04 16:07:48,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 251 transitions, 3680 flow [2024-06-04 16:07:48,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:07:48,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:07:48,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 241 transitions. [2024-06-04 16:07:48,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5216450216450217 [2024-06-04 16:07:48,682 INFO L175 Difference]: Start difference. First operand has 197 places, 231 transitions, 2942 flow. Second operand 11 states and 241 transitions. [2024-06-04 16:07:48,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 251 transitions, 3680 flow [2024-06-04 16:07:48,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 251 transitions, 3528 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-04 16:07:48,969 INFO L231 Difference]: Finished difference. Result has 203 places, 231 transitions, 2981 flow [2024-06-04 16:07:48,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2790, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2981, PETRI_PLACES=203, PETRI_TRANSITIONS=231} [2024-06-04 16:07:48,969 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-04 16:07:48,970 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 231 transitions, 2981 flow [2024-06-04 16:07:48,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:48,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:48,970 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 16:07:48,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-04 16:07:48,970 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 16:07:48,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:48,970 INFO L85 PathProgramCache]: Analyzing trace with hash -821751023, now seen corresponding path program 4 times [2024-06-04 16:07:48,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:48,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124277418] [2024-06-04 16:07:48,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:48,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:48,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:49,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:07:49,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:49,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124277418] [2024-06-04 16:07:49,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124277418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:49,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:49,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:07:49,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066851314] [2024-06-04 16:07:49,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:49,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:07:49,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:49,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:07:49,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:07:49,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:49,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 231 transitions, 2981 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:49,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:49,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:49,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:49,618 INFO L124 PetriNetUnfolderBase]: 1963/3357 cut-off events. [2024-06-04 16:07:49,618 INFO L125 PetriNetUnfolderBase]: For 149433/149433 co-relation queries the response was YES. [2024-06-04 16:07:49,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20948 conditions, 3357 events. 1963/3357 cut-off events. For 149433/149433 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 20535 event pairs, 491 based on Foata normal form. 3/3357 useless extension candidates. Maximal degree in co-relation 20853. Up to 2837 conditions per place. [2024-06-04 16:07:49,650 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 157 selfloop transitions, 90 changer transitions 0/254 dead transitions. [2024-06-04 16:07:49,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 254 transitions, 3823 flow [2024-06-04 16:07:49,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:07:49,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:07:49,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-04 16:07:49,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2024-06-04 16:07:49,651 INFO L175 Difference]: Start difference. First operand has 203 places, 231 transitions, 2981 flow. Second operand 7 states and 170 transitions. [2024-06-04 16:07:49,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 254 transitions, 3823 flow [2024-06-04 16:07:49,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 254 transitions, 3580 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-04 16:07:49,911 INFO L231 Difference]: Finished difference. Result has 201 places, 238 transitions, 3033 flow [2024-06-04 16:07:49,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2744, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3033, PETRI_PLACES=201, PETRI_TRANSITIONS=238} [2024-06-04 16:07:49,911 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 158 predicate places. [2024-06-04 16:07:49,912 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 238 transitions, 3033 flow [2024-06-04 16:07:49,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:49,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:49,912 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 16:07:49,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-04 16:07:49,912 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 16:07:49,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:49,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1683604363, now seen corresponding path program 5 times [2024-06-04 16:07:49,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:49,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446737891] [2024-06-04 16:07:49,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:49,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:49,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:50,095 INFO 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 16:07:50,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:50,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446737891] [2024-06-04 16:07:50,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446737891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:50,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:50,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:07:50,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818338490] [2024-06-04 16:07:50,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:50,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:07:50,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:50,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:07:50,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:07:50,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:50,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 238 transitions, 3033 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:50,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:50,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:50,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:50,556 INFO L124 PetriNetUnfolderBase]: 1956/3349 cut-off events. [2024-06-04 16:07:50,556 INFO L125 PetriNetUnfolderBase]: For 149502/149502 co-relation queries the response was YES. [2024-06-04 16:07:50,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20738 conditions, 3349 events. 1956/3349 cut-off events. For 149502/149502 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 20485 event pairs, 494 based on Foata normal form. 3/3349 useless extension candidates. Maximal degree in co-relation 20642. Up to 2832 conditions per place. [2024-06-04 16:07:50,586 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 161 selfloop transitions, 87 changer transitions 0/255 dead transitions. [2024-06-04 16:07:50,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 255 transitions, 3677 flow [2024-06-04 16:07:50,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:07:50,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:07:50,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-04 16:07:50,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2024-06-04 16:07:50,587 INFO L175 Difference]: Start difference. First operand has 201 places, 238 transitions, 3033 flow. Second operand 6 states and 152 transitions. [2024-06-04 16:07:50,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 255 transitions, 3677 flow [2024-06-04 16:07:50,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 255 transitions, 3485 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-04 16:07:50,833 INFO L231 Difference]: Finished difference. Result has 203 places, 238 transitions, 3028 flow [2024-06-04 16:07:50,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2841, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3028, PETRI_PLACES=203, PETRI_TRANSITIONS=238} [2024-06-04 16:07:50,833 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-04 16:07:50,833 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 238 transitions, 3028 flow [2024-06-04 16:07:50,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:50,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:50,834 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 16:07:50,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-04 16:07:50,834 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 16:07:50,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:50,834 INFO L85 PathProgramCache]: Analyzing trace with hash 366379209, now seen corresponding path program 1 times [2024-06-04 16:07:50,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:50,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683323053] [2024-06-04 16:07:50,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:50,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:50,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:51,035 INFO 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 16:07:51,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:51,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683323053] [2024-06-04 16:07:51,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683323053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:51,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:51,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:07:51,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455793906] [2024-06-04 16:07:51,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:51,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:07:51,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:51,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:07:51,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:07:51,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:51,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 238 transitions, 3028 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:51,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:51,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:51,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:51,540 INFO L124 PetriNetUnfolderBase]: 1995/3421 cut-off events. [2024-06-04 16:07:51,540 INFO L125 PetriNetUnfolderBase]: For 156920/156920 co-relation queries the response was YES. [2024-06-04 16:07:51,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21459 conditions, 3421 events. 1995/3421 cut-off events. For 156920/156920 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 20954 event pairs, 479 based on Foata normal form. 1/3420 useless extension candidates. Maximal degree in co-relation 21362. Up to 3020 conditions per place. [2024-06-04 16:07:51,570 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 224 selfloop transitions, 48 changer transitions 0/279 dead transitions. [2024-06-04 16:07:51,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 279 transitions, 4142 flow [2024-06-04 16:07:51,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:07:51,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:07:51,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-04 16:07:51,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-04 16:07:51,571 INFO L175 Difference]: Start difference. First operand has 203 places, 238 transitions, 3028 flow. Second operand 8 states and 184 transitions. [2024-06-04 16:07:51,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 279 transitions, 4142 flow [2024-06-04 16:07:51,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 279 transitions, 3857 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-04 16:07:51,954 INFO L231 Difference]: Finished difference. Result has 206 places, 255 transitions, 3183 flow [2024-06-04 16:07:51,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2761, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3183, PETRI_PLACES=206, PETRI_TRANSITIONS=255} [2024-06-04 16:07:51,955 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 163 predicate places. [2024-06-04 16:07:51,955 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 255 transitions, 3183 flow [2024-06-04 16:07:51,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:51,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:51,955 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 16:07:51,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-04 16:07:51,955 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 16:07:51,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:51,956 INFO L85 PathProgramCache]: Analyzing trace with hash 966528683, now seen corresponding path program 2 times [2024-06-04 16:07:51,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:51,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640355770] [2024-06-04 16:07:51,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:51,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:51,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:52,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:07:52,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:52,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640355770] [2024-06-04 16:07:52,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640355770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:52,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:52,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:07:52,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730508322] [2024-06-04 16:07:52,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:52,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:07:52,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:52,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:07:52,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:07:52,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:52,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 255 transitions, 3183 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:52,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:52,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:52,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:52,654 INFO L124 PetriNetUnfolderBase]: 2000/3430 cut-off events. [2024-06-04 16:07:52,654 INFO L125 PetriNetUnfolderBase]: For 161567/161567 co-relation queries the response was YES. [2024-06-04 16:07:52,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21426 conditions, 3430 events. 2000/3430 cut-off events. For 161567/161567 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 21030 event pairs, 479 based on Foata normal form. 1/3429 useless extension candidates. Maximal degree in co-relation 21327. Up to 2851 conditions per place. [2024-06-04 16:07:52,685 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 154 selfloop transitions, 121 changer transitions 0/282 dead transitions. [2024-06-04 16:07:52,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 282 transitions, 3957 flow [2024-06-04 16:07:52,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:07:52,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:07:52,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-04 16:07:52,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-04 16:07:52,687 INFO L175 Difference]: Start difference. First operand has 206 places, 255 transitions, 3183 flow. Second operand 10 states and 225 transitions. [2024-06-04 16:07:52,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 282 transitions, 3957 flow [2024-06-04 16:07:52,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 282 transitions, 3901 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-04 16:07:52,993 INFO L231 Difference]: Finished difference. Result has 213 places, 258 transitions, 3431 flow [2024-06-04 16:07:52,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3127, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3431, PETRI_PLACES=213, PETRI_TRANSITIONS=258} [2024-06-04 16:07:52,994 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 170 predicate places. [2024-06-04 16:07:52,994 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 258 transitions, 3431 flow [2024-06-04 16:07:52,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:52,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:52,994 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 16:07:52,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-04 16:07:52,994 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 16:07:52,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:52,994 INFO L85 PathProgramCache]: Analyzing trace with hash 517477739, now seen corresponding path program 3 times [2024-06-04 16:07:52,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:52,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968753393] [2024-06-04 16:07:52,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:52,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:53,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:53,188 INFO 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 16:07:53,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:53,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968753393] [2024-06-04 16:07:53,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968753393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:53,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:53,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:07:53,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003207762] [2024-06-04 16:07:53,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:53,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:07:53,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:53,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:07:53,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:07:53,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:53,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 258 transitions, 3431 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:53,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:53,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:53,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:53,738 INFO L124 PetriNetUnfolderBase]: 1991/3416 cut-off events. [2024-06-04 16:07:53,738 INFO L125 PetriNetUnfolderBase]: For 165293/165293 co-relation queries the response was YES. [2024-06-04 16:07:53,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21566 conditions, 3416 events. 1991/3416 cut-off events. For 165293/165293 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 20923 event pairs, 475 based on Foata normal form. 3/3416 useless extension candidates. Maximal degree in co-relation 21465. Up to 2993 conditions per place. [2024-06-04 16:07:53,772 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 220 selfloop transitions, 53 changer transitions 0/280 dead transitions. [2024-06-04 16:07:53,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 280 transitions, 4033 flow [2024-06-04 16:07:53,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:07:53,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:07:53,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-04 16:07:53,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-04 16:07:53,773 INFO L175 Difference]: Start difference. First operand has 213 places, 258 transitions, 3431 flow. Second operand 6 states and 156 transitions. [2024-06-04 16:07:53,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 280 transitions, 4033 flow [2024-06-04 16:07:54,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 280 transitions, 3743 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-04 16:07:54,057 INFO L231 Difference]: Finished difference. Result has 212 places, 258 transitions, 3270 flow [2024-06-04 16:07:54,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3141, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3270, PETRI_PLACES=212, PETRI_TRANSITIONS=258} [2024-06-04 16:07:54,057 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 169 predicate places. [2024-06-04 16:07:54,057 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 258 transitions, 3270 flow [2024-06-04 16:07:54,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:54,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:54,057 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 16:07:54,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-04 16:07:54,058 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 16:07:54,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:54,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1565055403, now seen corresponding path program 4 times [2024-06-04 16:07:54,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:54,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466068815] [2024-06-04 16:07:54,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:54,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:54,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:54,269 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 16:07:54,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:54,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466068815] [2024-06-04 16:07:54,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466068815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:54,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:54,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:07:54,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228896429] [2024-06-04 16:07:54,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:54,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:07:54,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:54,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:07:54,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:07:54,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:54,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 258 transitions, 3270 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:54,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:54,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:54,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:54,797 INFO L124 PetriNetUnfolderBase]: 1988/3399 cut-off events. [2024-06-04 16:07:54,797 INFO L125 PetriNetUnfolderBase]: For 165835/165835 co-relation queries the response was YES. [2024-06-04 16:07:54,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21347 conditions, 3399 events. 1988/3399 cut-off events. For 165835/165835 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 20799 event pairs, 494 based on Foata normal form. 1/3395 useless extension candidates. Maximal degree in co-relation 21245. Up to 2842 conditions per place. [2024-06-04 16:07:54,835 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 163 selfloop transitions, 109 changer transitions 0/279 dead transitions. [2024-06-04 16:07:54,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 279 transitions, 3978 flow [2024-06-04 16:07:54,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:07:54,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:07:54,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-04 16:07:54,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5214285714285715 [2024-06-04 16:07:54,836 INFO L175 Difference]: Start difference. First operand has 212 places, 258 transitions, 3270 flow. Second operand 10 states and 219 transitions. [2024-06-04 16:07:54,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 279 transitions, 3978 flow [2024-06-04 16:07:55,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 279 transitions, 3838 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-04 16:07:55,236 INFO L231 Difference]: Finished difference. Result has 216 places, 258 transitions, 3356 flow [2024-06-04 16:07:55,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3132, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3356, PETRI_PLACES=216, PETRI_TRANSITIONS=258} [2024-06-04 16:07:55,236 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 173 predicate places. [2024-06-04 16:07:55,236 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 258 transitions, 3356 flow [2024-06-04 16:07:55,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:55,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:55,237 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 16:07:55,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-04 16:07:55,237 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 16:07:55,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:55,238 INFO L85 PathProgramCache]: Analyzing trace with hash -682965045, now seen corresponding path program 5 times [2024-06-04 16:07:55,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:55,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145271033] [2024-06-04 16:07:55,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:55,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:55,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:55,429 INFO 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 16:07:55,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:55,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145271033] [2024-06-04 16:07:55,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145271033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:55,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:55,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:07:55,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009419584] [2024-06-04 16:07:55,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:55,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:07:55,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:55,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:07:55,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:07:55,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:55,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 258 transitions, 3356 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:55,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:55,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:55,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:55,904 INFO L124 PetriNetUnfolderBase]: 1985/3406 cut-off events. [2024-06-04 16:07:55,905 INFO L125 PetriNetUnfolderBase]: For 164840/164844 co-relation queries the response was YES. [2024-06-04 16:07:55,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21413 conditions, 3406 events. 1985/3406 cut-off events. For 164840/164844 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 20924 event pairs, 490 based on Foata normal form. 5/3409 useless extension candidates. Maximal degree in co-relation 21311. Up to 3008 conditions per place. [2024-06-04 16:07:55,940 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 231 selfloop transitions, 39 changer transitions 0/277 dead transitions. [2024-06-04 16:07:55,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 277 transitions, 4056 flow [2024-06-04 16:07:55,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:07:55,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:07:55,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-04 16:07:55,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-04 16:07:55,941 INFO L175 Difference]: Start difference. First operand has 216 places, 258 transitions, 3356 flow. Second operand 8 states and 180 transitions. [2024-06-04 16:07:55,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 277 transitions, 4056 flow [2024-06-04 16:07:56,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 277 transitions, 3929 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-04 16:07:56,310 INFO L231 Difference]: Finished difference. Result has 219 places, 258 transitions, 3313 flow [2024-06-04 16:07:56,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3229, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3313, PETRI_PLACES=219, PETRI_TRANSITIONS=258} [2024-06-04 16:07:56,310 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-04 16:07:56,310 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 258 transitions, 3313 flow [2024-06-04 16:07:56,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:56,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:56,311 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 16:07:56,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-04 16:07:56,311 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 16:07:56,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:56,311 INFO L85 PathProgramCache]: Analyzing trace with hash -179690879, now seen corresponding path program 6 times [2024-06-04 16:07:56,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:56,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407407448] [2024-06-04 16:07:56,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:56,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:56,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:56,504 INFO 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 16:07:56,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:56,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407407448] [2024-06-04 16:07:56,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407407448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:56,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:56,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:07:56,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925642591] [2024-06-04 16:07:56,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:56,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:07:56,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:56,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:07:56,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:07:56,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:56,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 258 transitions, 3313 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:56,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:56,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:56,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:56,955 INFO L124 PetriNetUnfolderBase]: 1977/3394 cut-off events. [2024-06-04 16:07:56,955 INFO L125 PetriNetUnfolderBase]: For 168014/168018 co-relation queries the response was YES. [2024-06-04 16:07:56,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21146 conditions, 3394 events. 1977/3394 cut-off events. For 168014/168018 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 20871 event pairs, 490 based on Foata normal form. 6/3398 useless extension candidates. Maximal degree in co-relation 21043. Up to 2832 conditions per place. [2024-06-04 16:07:56,984 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 170 selfloop transitions, 97 changer transitions 0/274 dead transitions. [2024-06-04 16:07:56,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 274 transitions, 4001 flow [2024-06-04 16:07:56,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:07:56,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:07:56,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-04 16:07:56,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-04 16:07:56,985 INFO L175 Difference]: Start difference. First operand has 219 places, 258 transitions, 3313 flow. Second operand 8 states and 182 transitions. [2024-06-04 16:07:56,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 274 transitions, 4001 flow [2024-06-04 16:07:57,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 274 transitions, 3849 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-04 16:07:57,347 INFO L231 Difference]: Finished difference. Result has 220 places, 258 transitions, 3363 flow [2024-06-04 16:07:57,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3161, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3363, PETRI_PLACES=220, PETRI_TRANSITIONS=258} [2024-06-04 16:07:57,348 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 177 predicate places. [2024-06-04 16:07:57,348 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 258 transitions, 3363 flow [2024-06-04 16:07:57,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:57,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:57,348 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 16:07:57,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-04 16:07:57,348 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 16:07:57,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:57,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1896211429, now seen corresponding path program 7 times [2024-06-04 16:07:57,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:57,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763427831] [2024-06-04 16:07:57,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:57,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:57,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:57,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:07:57,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:57,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763427831] [2024-06-04 16:07:57,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763427831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:57,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:57,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:07:57,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130498706] [2024-06-04 16:07:57,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:57,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:07:57,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:57,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:07:57,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:07:57,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:57,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 258 transitions, 3363 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 16:07:57,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:57,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:57,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:58,070 INFO L124 PetriNetUnfolderBase]: 1987/3401 cut-off events. [2024-06-04 16:07:58,071 INFO L125 PetriNetUnfolderBase]: For 174132/174132 co-relation queries the response was YES. [2024-06-04 16:07:58,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21385 conditions, 3401 events. 1987/3401 cut-off events. For 174132/174132 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 20901 event pairs, 494 based on Foata normal form. 2/3398 useless extension candidates. Maximal degree in co-relation 21282. Up to 2972 conditions per place. [2024-06-04 16:07:58,104 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 211 selfloop transitions, 61 changer transitions 0/279 dead transitions. [2024-06-04 16:07:58,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 279 transitions, 4135 flow [2024-06-04 16:07:58,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:07:58,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:07:58,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-04 16:07:58,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5264550264550265 [2024-06-04 16:07:58,105 INFO L175 Difference]: Start difference. First operand has 220 places, 258 transitions, 3363 flow. Second operand 9 states and 199 transitions. [2024-06-04 16:07:58,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 279 transitions, 4135 flow [2024-06-04 16:07:58,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 279 transitions, 3947 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-04 16:07:58,491 INFO L231 Difference]: Finished difference. Result has 223 places, 262 transitions, 3374 flow [2024-06-04 16:07:58,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3181, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3374, PETRI_PLACES=223, PETRI_TRANSITIONS=262} [2024-06-04 16:07:58,491 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-04 16:07:58,491 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 262 transitions, 3374 flow [2024-06-04 16:07:58,491 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 16:07:58,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:58,492 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 16:07:58,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-04 16:07:58,492 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 16:07:58,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:58,492 INFO L85 PathProgramCache]: Analyzing trace with hash -730332805, now seen corresponding path program 8 times [2024-06-04 16:07:58,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:58,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182035740] [2024-06-04 16:07:58,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:58,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:58,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:58,704 INFO 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 16:07:58,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:58,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182035740] [2024-06-04 16:07:58,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182035740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:58,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:58,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:07:58,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062901989] [2024-06-04 16:07:58,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:58,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:07:58,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:58,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:07:58,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:07:58,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:58,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 262 transitions, 3374 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:58,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:58,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:58,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:59,219 INFO L124 PetriNetUnfolderBase]: 1979/3389 cut-off events. [2024-06-04 16:07:59,220 INFO L125 PetriNetUnfolderBase]: For 175304/175304 co-relation queries the response was YES. [2024-06-04 16:07:59,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21159 conditions, 3389 events. 1979/3389 cut-off events. For 175304/175304 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 20763 event pairs, 494 based on Foata normal form. 2/3386 useless extension candidates. Maximal degree in co-relation 21054. Up to 2834 conditions per place. [2024-06-04 16:07:59,253 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 166 selfloop transitions, 106 changer transitions 0/279 dead transitions. [2024-06-04 16:07:59,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 279 transitions, 4078 flow [2024-06-04 16:07:59,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:07:59,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:07:59,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-04 16:07:59,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5343915343915344 [2024-06-04 16:07:59,254 INFO L175 Difference]: Start difference. First operand has 223 places, 262 transitions, 3374 flow. Second operand 9 states and 202 transitions. [2024-06-04 16:07:59,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 279 transitions, 4078 flow [2024-06-04 16:07:59,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 279 transitions, 3824 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-04 16:07:59,666 INFO L231 Difference]: Finished difference. Result has 224 places, 262 transitions, 3341 flow [2024-06-04 16:07:59,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3120, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3341, PETRI_PLACES=224, PETRI_TRANSITIONS=262} [2024-06-04 16:07:59,667 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 181 predicate places. [2024-06-04 16:07:59,667 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 262 transitions, 3341 flow [2024-06-04 16:07:59,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:59,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:59,667 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 16:07:59,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-04 16:07:59,668 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 16:07:59,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:59,668 INFO L85 PathProgramCache]: Analyzing trace with hash 346780173, now seen corresponding path program 9 times [2024-06-04 16:07:59,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:59,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793867973] [2024-06-04 16:07:59,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:59,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:59,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:59,856 INFO 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 16:07:59,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:59,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793867973] [2024-06-04 16:07:59,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793867973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:59,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:59,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:07:59,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805851488] [2024-06-04 16:07:59,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:59,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:07:59,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:59,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:07:59,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:07:59,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:59,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 262 transitions, 3341 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:59,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:59,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:59,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:00,375 INFO L124 PetriNetUnfolderBase]: 1989/3420 cut-off events. [2024-06-04 16:08:00,375 INFO L125 PetriNetUnfolderBase]: For 179201/179201 co-relation queries the response was YES. [2024-06-04 16:08:00,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21433 conditions, 3420 events. 1989/3420 cut-off events. For 179201/179201 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 21018 event pairs, 475 based on Foata normal form. 2/3419 useless extension candidates. Maximal degree in co-relation 21327. Up to 2863 conditions per place. [2024-06-04 16:08:00,407 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 180 selfloop transitions, 106 changer transitions 0/293 dead transitions. [2024-06-04 16:08:00,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 293 transitions, 4193 flow [2024-06-04 16:08:00,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:08:00,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:08:00,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-04 16:08:00,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-06-04 16:08:00,408 INFO L175 Difference]: Start difference. First operand has 224 places, 262 transitions, 3341 flow. Second operand 7 states and 184 transitions. [2024-06-04 16:08:00,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 293 transitions, 4193 flow [2024-06-04 16:08:00,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 293 transitions, 3975 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-04 16:08:00,915 INFO L231 Difference]: Finished difference. Result has 223 places, 266 transitions, 3457 flow [2024-06-04 16:08:00,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3129, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3457, PETRI_PLACES=223, PETRI_TRANSITIONS=266} [2024-06-04 16:08:00,916 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-04 16:08:00,916 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 266 transitions, 3457 flow [2024-06-04 16:08:00,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:00,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:00,916 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 16:08:00,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-04 16:08:00,916 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 16:08:00,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:00,917 INFO L85 PathProgramCache]: Analyzing trace with hash -652141431, now seen corresponding path program 10 times [2024-06-04 16:08:00,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:00,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457214286] [2024-06-04 16:08:00,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:00,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:00,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:01,109 INFO 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 16:08:01,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:01,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457214286] [2024-06-04 16:08:01,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457214286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:01,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:01,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:08:01,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740225939] [2024-06-04 16:08:01,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:01,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:08:01,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:01,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:08:01,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:08:01,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:08:01,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 266 transitions, 3457 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:01,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:01,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:08:01,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:01,568 INFO L124 PetriNetUnfolderBase]: 1981/3400 cut-off events. [2024-06-04 16:08:01,568 INFO L125 PetriNetUnfolderBase]: For 180677/180677 co-relation queries the response was YES. [2024-06-04 16:08:01,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21351 conditions, 3400 events. 1981/3400 cut-off events. For 180677/180677 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 20903 event pairs, 494 based on Foata normal form. 2/3399 useless extension candidates. Maximal degree in co-relation 21244. Up to 2855 conditions per place. [2024-06-04 16:08:01,599 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 184 selfloop transitions, 94 changer transitions 0/285 dead transitions. [2024-06-04 16:08:01,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 285 transitions, 4061 flow [2024-06-04 16:08:01,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:08:01,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:08:01,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-04 16:08:01,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-04 16:08:01,600 INFO L175 Difference]: Start difference. First operand has 223 places, 266 transitions, 3457 flow. Second operand 6 states and 154 transitions. [2024-06-04 16:08:01,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 285 transitions, 4061 flow [2024-06-04 16:08:02,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 285 transitions, 3774 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-04 16:08:02,068 INFO L231 Difference]: Finished difference. Result has 222 places, 266 transitions, 3371 flow [2024-06-04 16:08:02,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3170, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3371, PETRI_PLACES=222, PETRI_TRANSITIONS=266} [2024-06-04 16:08:02,069 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 179 predicate places. [2024-06-04 16:08:02,069 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 266 transitions, 3371 flow [2024-06-04 16:08:02,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:02,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:02,069 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 16:08:02,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-04 16:08:02,070 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 16:08:02,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:02,070 INFO L85 PathProgramCache]: Analyzing trace with hash -430718847, now seen corresponding path program 1 times [2024-06-04 16:08:02,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:02,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200945967] [2024-06-04 16:08:02,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:02,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:02,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:02,270 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 16:08:02,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:02,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200945967] [2024-06-04 16:08:02,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200945967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:02,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:02,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:08:02,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695586101] [2024-06-04 16:08:02,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:02,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:08:02,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:02,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:08:02,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:08:02,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 16:08:02,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 266 transitions, 3371 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 16:08:02,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:02,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 16:08:02,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:02,708 INFO L124 PetriNetUnfolderBase]: 1915/3336 cut-off events. [2024-06-04 16:08:02,708 INFO L125 PetriNetUnfolderBase]: For 185285/185285 co-relation queries the response was YES. [2024-06-04 16:08:02,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20791 conditions, 3336 events. 1915/3336 cut-off events. For 185285/185285 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 20757 event pairs, 347 based on Foata normal form. 7/3321 useless extension candidates. Maximal degree in co-relation 20685. Up to 2758 conditions per place. [2024-06-04 16:08:02,738 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 217 selfloop transitions, 26 changer transitions 1/289 dead transitions. [2024-06-04 16:08:02,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 289 transitions, 3939 flow [2024-06-04 16:08:02,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:08:02,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:08:02,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2024-06-04 16:08:02,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-04 16:08:02,739 INFO L175 Difference]: Start difference. First operand has 222 places, 266 transitions, 3371 flow. Second operand 5 states and 135 transitions. [2024-06-04 16:08:02,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 289 transitions, 3939 flow [2024-06-04 16:08:03,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 289 transitions, 3654 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-04 16:08:03,201 INFO L231 Difference]: Finished difference. Result has 220 places, 267 transitions, 3160 flow [2024-06-04 16:08:03,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3086, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3160, PETRI_PLACES=220, PETRI_TRANSITIONS=267} [2024-06-04 16:08:03,201 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 177 predicate places. [2024-06-04 16:08:03,201 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 267 transitions, 3160 flow [2024-06-04 16:08:03,201 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 16:08:03,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:03,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:08:03,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-04 16:08:03,201 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 16:08:03,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:03,202 INFO L85 PathProgramCache]: Analyzing trace with hash -415481727, now seen corresponding path program 2 times [2024-06-04 16:08:03,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:03,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262730520] [2024-06-04 16:08:03,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:03,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:03,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:03,397 INFO 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 16:08:03,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:03,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262730520] [2024-06-04 16:08:03,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262730520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:03,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:03,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:08:03,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357426185] [2024-06-04 16:08:03,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:03,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:08:03,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:03,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:08:03,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:08:03,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 16:08:03,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 267 transitions, 3160 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 16:08:03,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:03,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 16:08:03,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:03,834 INFO L124 PetriNetUnfolderBase]: 1917/3339 cut-off events. [2024-06-04 16:08:03,834 INFO L125 PetriNetUnfolderBase]: For 177161/177161 co-relation queries the response was YES. [2024-06-04 16:08:03,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20341 conditions, 3339 events. 1917/3339 cut-off events. For 177161/177161 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 20904 event pairs, 337 based on Foata normal form. 8/3327 useless extension candidates. Maximal degree in co-relation 20235. Up to 2657 conditions per place. [2024-06-04 16:08:03,864 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 221 selfloop transitions, 22 changer transitions 0/288 dead transitions. [2024-06-04 16:08:03,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 288 transitions, 3850 flow [2024-06-04 16:08:03,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:08:03,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:08:03,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-04 16:08:03,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-06-04 16:08:03,865 INFO L175 Difference]: Start difference. First operand has 220 places, 267 transitions, 3160 flow. Second operand 5 states and 129 transitions. [2024-06-04 16:08:03,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 288 transitions, 3850 flow [2024-06-04 16:08:04,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 288 transitions, 3802 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-04 16:08:04,297 INFO L231 Difference]: Finished difference. Result has 222 places, 268 transitions, 3172 flow [2024-06-04 16:08:04,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3112, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3172, PETRI_PLACES=222, PETRI_TRANSITIONS=268} [2024-06-04 16:08:04,297 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 179 predicate places. [2024-06-04 16:08:04,298 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 268 transitions, 3172 flow [2024-06-04 16:08:04,298 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 16:08:04,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:04,298 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 16:08:04,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-04 16:08:04,298 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 16:08:04,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:04,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1804209993, now seen corresponding path program 1 times [2024-06-04 16:08:04,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:04,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384437907] [2024-06-04 16:08:04,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:04,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:04,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:04,507 INFO 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 16:08:04,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:04,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384437907] [2024-06-04 16:08:04,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384437907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:04,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:04,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:08:04,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827966309] [2024-06-04 16:08:04,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:04,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:08:04,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:04,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:08:04,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:08:04,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:08:04,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 268 transitions, 3172 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:04,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:04,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:08:04,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:05,042 INFO L124 PetriNetUnfolderBase]: 2019/3477 cut-off events. [2024-06-04 16:08:05,042 INFO L125 PetriNetUnfolderBase]: For 172198/172202 co-relation queries the response was YES. [2024-06-04 16:08:05,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21152 conditions, 3477 events. 2019/3477 cut-off events. For 172198/172202 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 21480 event pairs, 450 based on Foata normal form. 6/3482 useless extension candidates. Maximal degree in co-relation 21045. Up to 3098 conditions per place. [2024-06-04 16:08:05,074 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 254 selfloop transitions, 32 changer transitions 0/293 dead transitions. [2024-06-04 16:08:05,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 293 transitions, 4014 flow [2024-06-04 16:08:05,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:08:05,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:08:05,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-04 16:08:05,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5267857142857143 [2024-06-04 16:08:05,075 INFO L175 Difference]: Start difference. First operand has 222 places, 268 transitions, 3172 flow. Second operand 8 states and 177 transitions. [2024-06-04 16:08:05,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 293 transitions, 4014 flow [2024-06-04 16:08:05,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 293 transitions, 3976 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-04 16:08:05,425 INFO L231 Difference]: Finished difference. Result has 228 places, 272 transitions, 3303 flow [2024-06-04 16:08:05,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3134, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3303, PETRI_PLACES=228, PETRI_TRANSITIONS=272} [2024-06-04 16:08:05,425 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 185 predicate places. [2024-06-04 16:08:05,425 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 272 transitions, 3303 flow [2024-06-04 16:08:05,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:05,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:05,425 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 16:08:05,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-04 16:08:05,426 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 16:08:05,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:05,426 INFO L85 PathProgramCache]: Analyzing trace with hash -290503479, now seen corresponding path program 2 times [2024-06-04 16:08:05,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:05,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258752828] [2024-06-04 16:08:05,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:05,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:05,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:05,630 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 16:08:05,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:05,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258752828] [2024-06-04 16:08:05,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258752828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:05,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:05,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:08:05,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584380422] [2024-06-04 16:08:05,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:05,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:08:05,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:05,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:08:05,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:08:05,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:08:05,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 272 transitions, 3303 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:05,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:05,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:08:05,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:06,160 INFO L124 PetriNetUnfolderBase]: 2027/3489 cut-off events. [2024-06-04 16:08:06,160 INFO L125 PetriNetUnfolderBase]: For 177962/177966 co-relation queries the response was YES. [2024-06-04 16:08:06,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21332 conditions, 3489 events. 2027/3489 cut-off events. For 177962/177966 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 21566 event pairs, 481 based on Foata normal form. 6/3494 useless extension candidates. Maximal degree in co-relation 21224. Up to 3143 conditions per place. [2024-06-04 16:08:06,201 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 255 selfloop transitions, 28 changer transitions 0/290 dead transitions. [2024-06-04 16:08:06,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 290 transitions, 3959 flow [2024-06-04 16:08:06,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:08:06,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:08:06,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-04 16:08:06,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5119047619047619 [2024-06-04 16:08:06,202 INFO L175 Difference]: Start difference. First operand has 228 places, 272 transitions, 3303 flow. Second operand 8 states and 172 transitions. [2024-06-04 16:08:06,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 290 transitions, 3959 flow [2024-06-04 16:08:06,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 290 transitions, 3851 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-06-04 16:08:06,661 INFO L231 Difference]: Finished difference. Result has 233 places, 274 transitions, 3312 flow [2024-06-04 16:08:06,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3213, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3312, PETRI_PLACES=233, PETRI_TRANSITIONS=274} [2024-06-04 16:08:06,661 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-04 16:08:06,661 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 274 transitions, 3312 flow [2024-06-04 16:08:06,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:06,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:06,662 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 16:08:06,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-04 16:08:06,662 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 16:08:06,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:06,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1895934599, now seen corresponding path program 3 times [2024-06-04 16:08:06,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:06,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469143295] [2024-06-04 16:08:06,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:06,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:06,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:06,891 INFO 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 16:08:06,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:06,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469143295] [2024-06-04 16:08:06,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469143295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:06,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:06,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:08:06,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643334354] [2024-06-04 16:08:06,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:06,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:08:06,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:06,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:08:06,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:08:06,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:08:06,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 274 transitions, 3312 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 16:08:06,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:06,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:08:06,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:07,412 INFO L124 PetriNetUnfolderBase]: 2035/3497 cut-off events. [2024-06-04 16:08:07,412 INFO L125 PetriNetUnfolderBase]: For 182363/182363 co-relation queries the response was YES. [2024-06-04 16:08:07,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21299 conditions, 3497 events. 2035/3497 cut-off events. For 182363/182363 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 21544 event pairs, 481 based on Foata normal form. 2/3497 useless extension candidates. Maximal degree in co-relation 21190. Up to 3167 conditions per place. [2024-06-04 16:08:07,448 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 266 selfloop transitions, 18 changer transitions 0/291 dead transitions. [2024-06-04 16:08:07,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 291 transitions, 3954 flow [2024-06-04 16:08:07,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:08:07,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:08:07,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-06-04 16:08:07,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5204081632653061 [2024-06-04 16:08:07,449 INFO L175 Difference]: Start difference. First operand has 233 places, 274 transitions, 3312 flow. Second operand 7 states and 153 transitions. [2024-06-04 16:08:07,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 291 transitions, 3954 flow [2024-06-04 16:08:07,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 291 transitions, 3871 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-04 16:08:07,856 INFO L231 Difference]: Finished difference. Result has 234 places, 276 transitions, 3312 flow [2024-06-04 16:08:07,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3229, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3312, PETRI_PLACES=234, PETRI_TRANSITIONS=276} [2024-06-04 16:08:07,856 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-04 16:08:07,856 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 276 transitions, 3312 flow [2024-06-04 16:08:07,856 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 16:08:07,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:07,857 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 16:08:07,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-04 16:08:07,857 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 16:08:07,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:07,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1536146493, now seen corresponding path program 1 times [2024-06-04 16:08:07,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:07,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538071062] [2024-06-04 16:08:07,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:07,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:07,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:08,060 INFO 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 16:08:08,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:08,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538071062] [2024-06-04 16:08:08,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538071062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:08,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:08,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:08:08,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845942545] [2024-06-04 16:08:08,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:08,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:08:08,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:08,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:08:08,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:08:08,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:08:08,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 276 transitions, 3312 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 16:08:08,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:08,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:08:08,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:08,593 INFO L124 PetriNetUnfolderBase]: 2051/3509 cut-off events. [2024-06-04 16:08:08,594 INFO L125 PetriNetUnfolderBase]: For 193354/193354 co-relation queries the response was YES. [2024-06-04 16:08:08,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21537 conditions, 3509 events. 2051/3509 cut-off events. For 193354/193354 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 21595 event pairs, 500 based on Foata normal form. 4/3508 useless extension candidates. Maximal degree in co-relation 21427. Up to 2934 conditions per place. [2024-06-04 16:08:08,626 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 176 selfloop transitions, 113 changer transitions 0/296 dead transitions. [2024-06-04 16:08:08,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 296 transitions, 3994 flow [2024-06-04 16:08:08,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:08:08,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:08:08,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-04 16:08:08,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5291005291005291 [2024-06-04 16:08:08,627 INFO L175 Difference]: Start difference. First operand has 234 places, 276 transitions, 3312 flow. Second operand 9 states and 200 transitions. [2024-06-04 16:08:08,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 296 transitions, 3994 flow [2024-06-04 16:08:09,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 296 transitions, 3931 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-04 16:08:09,046 INFO L231 Difference]: Finished difference. Result has 238 places, 279 transitions, 3551 flow [2024-06-04 16:08:09,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3249, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3551, PETRI_PLACES=238, PETRI_TRANSITIONS=279} [2024-06-04 16:08:09,046 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 195 predicate places. [2024-06-04 16:08:09,047 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 279 transitions, 3551 flow [2024-06-04 16:08:09,047 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 16:08:09,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:09,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:08:09,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-04 16:08:09,047 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 16:08:09,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:09,047 INFO L85 PathProgramCache]: Analyzing trace with hash 347057003, now seen corresponding path program 4 times [2024-06-04 16:08:09,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:09,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046710364] [2024-06-04 16:08:09,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:09,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:09,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:09,262 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 16:08:09,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:09,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046710364] [2024-06-04 16:08:09,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046710364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:09,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:09,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:08:09,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775641848] [2024-06-04 16:08:09,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:09,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:08:09,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:09,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:08:09,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:08:09,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:08:09,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 279 transitions, 3551 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:09,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:09,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:08:09,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:09,780 INFO L124 PetriNetUnfolderBase]: 2046/3517 cut-off events. [2024-06-04 16:08:09,781 INFO L125 PetriNetUnfolderBase]: For 190561/190561 co-relation queries the response was YES. [2024-06-04 16:08:09,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21832 conditions, 3517 events. 2046/3517 cut-off events. For 190561/190561 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 21705 event pairs, 446 based on Foata normal form. 2/3518 useless extension candidates. Maximal degree in co-relation 21721. Up to 3163 conditions per place. [2024-06-04 16:08:09,817 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 270 selfloop transitions, 22 changer transitions 0/299 dead transitions. [2024-06-04 16:08:09,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 299 transitions, 4185 flow [2024-06-04 16:08:09,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:08:09,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:08:09,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-04 16:08:09,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-04 16:08:09,818 INFO L175 Difference]: Start difference. First operand has 238 places, 279 transitions, 3551 flow. Second operand 6 states and 144 transitions. [2024-06-04 16:08:09,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 299 transitions, 4185 flow [2024-06-04 16:08:10,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 299 transitions, 3881 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-04 16:08:10,184 INFO L231 Difference]: Finished difference. Result has 237 places, 279 transitions, 3299 flow [2024-06-04 16:08:10,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3247, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3299, PETRI_PLACES=237, PETRI_TRANSITIONS=279} [2024-06-04 16:08:10,185 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-04 16:08:10,185 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 279 transitions, 3299 flow [2024-06-04 16:08:10,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:10,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:10,185 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 16:08:10,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-04 16:08:10,185 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 16:08:10,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:10,186 INFO L85 PathProgramCache]: Analyzing trace with hash -424045663, now seen corresponding path program 2 times [2024-06-04 16:08:10,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:10,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738478373] [2024-06-04 16:08:10,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:10,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:10,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:10,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:08:10,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:10,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738478373] [2024-06-04 16:08:10,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738478373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:10,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:10,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:08:10,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761017444] [2024-06-04 16:08:10,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:10,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:08:10,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:10,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:08:10,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:08:10,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:08:10,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 279 transitions, 3299 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 16:08:10,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:10,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:08:10,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:11,013 INFO L124 PetriNetUnfolderBase]: 2090/3575 cut-off events. [2024-06-04 16:08:11,013 INFO L125 PetriNetUnfolderBase]: For 219284/219284 co-relation queries the response was YES. [2024-06-04 16:08:11,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22018 conditions, 3575 events. 2090/3575 cut-off events. For 219284/219284 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 22082 event pairs, 504 based on Foata normal form. 12/3584 useless extension candidates. Maximal degree in co-relation 21906. Up to 2982 conditions per place. [2024-06-04 16:08:11,122 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 193 selfloop transitions, 101 changer transitions 0/301 dead transitions. [2024-06-04 16:08:11,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 301 transitions, 4017 flow [2024-06-04 16:08:11,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:08:11,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:08:11,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-04 16:08:11,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5654761904761905 [2024-06-04 16:08:11,123 INFO L175 Difference]: Start difference. First operand has 237 places, 279 transitions, 3299 flow. Second operand 8 states and 190 transitions. [2024-06-04 16:08:11,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 301 transitions, 4017 flow [2024-06-04 16:08:11,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 301 transitions, 3959 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-04 16:08:11,536 INFO L231 Difference]: Finished difference. Result has 240 places, 282 transitions, 3527 flow [2024-06-04 16:08:11,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3241, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3527, PETRI_PLACES=240, PETRI_TRANSITIONS=282} [2024-06-04 16:08:11,536 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 197 predicate places. [2024-06-04 16:08:11,536 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 282 transitions, 3527 flow [2024-06-04 16:08:11,537 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 16:08:11,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:11,537 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 16:08:11,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-04 16:08:11,537 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 16:08:11,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:11,537 INFO L85 PathProgramCache]: Analyzing trace with hash -415474783, now seen corresponding path program 3 times [2024-06-04 16:08:11,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:11,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759367388] [2024-06-04 16:08:11,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:11,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:11,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:11,756 INFO 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 16:08:11,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:11,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759367388] [2024-06-04 16:08:11,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759367388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:11,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:11,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:08:11,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959591631] [2024-06-04 16:08:11,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:11,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:08:11,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:11,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:08:11,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:08:11,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:08:11,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 282 transitions, 3527 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 16:08:11,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:11,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:08:11,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:12,385 INFO L124 PetriNetUnfolderBase]: 2432/4131 cut-off events. [2024-06-04 16:08:12,385 INFO L125 PetriNetUnfolderBase]: For 350745/350745 co-relation queries the response was YES. [2024-06-04 16:08:12,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29193 conditions, 4131 events. 2432/4131 cut-off events. For 350745/350745 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 26046 event pairs, 622 based on Foata normal form. 12/4140 useless extension candidates. Maximal degree in co-relation 29080. Up to 2935 conditions per place. [2024-06-04 16:08:12,428 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 203 selfloop transitions, 105 changer transitions 0/315 dead transitions. [2024-06-04 16:08:12,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 315 transitions, 4544 flow [2024-06-04 16:08:12,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:08:12,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:08:12,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-04 16:08:12,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-04 16:08:12,429 INFO L175 Difference]: Start difference. First operand has 240 places, 282 transitions, 3527 flow. Second operand 8 states and 196 transitions. [2024-06-04 16:08:12,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 315 transitions, 4544 flow [2024-06-04 16:08:13,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 315 transitions, 4290 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-04 16:08:13,081 INFO L231 Difference]: Finished difference. Result has 243 places, 288 transitions, 3648 flow [2024-06-04 16:08:13,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3273, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3648, PETRI_PLACES=243, PETRI_TRANSITIONS=288} [2024-06-04 16:08:13,081 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 200 predicate places. [2024-06-04 16:08:13,082 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 288 transitions, 3648 flow [2024-06-04 16:08:13,082 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 16:08:13,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:13,082 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 16:08:13,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-04 16:08:13,082 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 16:08:13,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:13,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1065837045, now seen corresponding path program 4 times [2024-06-04 16:08:13,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:13,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750469883] [2024-06-04 16:08:13,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:13,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:13,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:13,298 INFO 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 16:08:13,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:13,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750469883] [2024-06-04 16:08:13,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750469883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:13,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:13,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:08:13,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719379237] [2024-06-04 16:08:13,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:13,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:08:13,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:13,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:08:13,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:08:13,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:08:13,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 288 transitions, 3648 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 16:08:13,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:13,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:08:13,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:13,967 INFO L124 PetriNetUnfolderBase]: 2404/4093 cut-off events. [2024-06-04 16:08:13,967 INFO L125 PetriNetUnfolderBase]: For 328702/328702 co-relation queries the response was YES. [2024-06-04 16:08:13,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28147 conditions, 4093 events. 2404/4093 cut-off events. For 328702/328702 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 25850 event pairs, 645 based on Foata normal form. 12/4102 useless extension candidates. Maximal degree in co-relation 28032. Up to 3476 conditions per place. [2024-06-04 16:08:14,008 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 207 selfloop transitions, 98 changer transitions 0/312 dead transitions. [2024-06-04 16:08:14,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 312 transitions, 4408 flow [2024-06-04 16:08:14,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:08:14,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:08:14,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-04 16:08:14,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-04 16:08:14,009 INFO L175 Difference]: Start difference. First operand has 243 places, 288 transitions, 3648 flow. Second operand 7 states and 173 transitions. [2024-06-04 16:08:14,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 312 transitions, 4408 flow [2024-06-04 16:08:14,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 312 transitions, 4206 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-04 16:08:14,669 INFO L231 Difference]: Finished difference. Result has 246 places, 291 transitions, 3740 flow [2024-06-04 16:08:14,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3452, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3740, PETRI_PLACES=246, PETRI_TRANSITIONS=291} [2024-06-04 16:08:14,669 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 203 predicate places. [2024-06-04 16:08:14,669 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 291 transitions, 3740 flow [2024-06-04 16:08:14,670 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 16:08:14,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:14,670 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 16:08:14,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-04 16:08:14,670 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 16:08:14,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:14,670 INFO L85 PathProgramCache]: Analyzing trace with hash -973756629, now seen corresponding path program 1 times [2024-06-04 16:08:14,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:14,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139952121] [2024-06-04 16:08:14,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:14,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:14,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:14,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:08:14,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:14,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139952121] [2024-06-04 16:08:14,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139952121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:14,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:14,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:08:14,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795237101] [2024-06-04 16:08:14,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:14,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:08:14,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:14,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:08:14,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:08:14,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:08:14,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 291 transitions, 3740 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 16:08:14,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:14,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:08:14,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:15,597 INFO L124 PetriNetUnfolderBase]: 2417/4123 cut-off events. [2024-06-04 16:08:15,597 INFO L125 PetriNetUnfolderBase]: For 316958/316958 co-relation queries the response was YES. [2024-06-04 16:08:15,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28355 conditions, 4123 events. 2417/4123 cut-off events. For 316958/316958 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 26056 event pairs, 626 based on Foata normal form. 1/4121 useless extension candidates. Maximal degree in co-relation 28238. Up to 3690 conditions per place. [2024-06-04 16:08:15,639 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 280 selfloop transitions, 42 changer transitions 0/329 dead transitions. [2024-06-04 16:08:15,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 329 transitions, 4732 flow [2024-06-04 16:08:15,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:08:15,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:08:15,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-04 16:08:15,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-04 16:08:15,640 INFO L175 Difference]: Start difference. First operand has 246 places, 291 transitions, 3740 flow. Second operand 9 states and 213 transitions. [2024-06-04 16:08:15,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 329 transitions, 4732 flow [2024-06-04 16:08:16,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 329 transitions, 4482 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-04 16:08:16,200 INFO L231 Difference]: Finished difference. Result has 251 places, 297 transitions, 3721 flow [2024-06-04 16:08:16,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3490, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3721, PETRI_PLACES=251, PETRI_TRANSITIONS=297} [2024-06-04 16:08:16,201 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 208 predicate places. [2024-06-04 16:08:16,201 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 297 transitions, 3721 flow [2024-06-04 16:08:16,201 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 16:08:16,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:16,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:08:16,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-04 16:08:16,201 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 16:08:16,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:16,201 INFO L85 PathProgramCache]: Analyzing trace with hash -285503941, now seen corresponding path program 2 times [2024-06-04 16:08:16,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:16,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231040162] [2024-06-04 16:08:16,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:16,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:16,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:16,380 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 16:08:16,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:16,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231040162] [2024-06-04 16:08:16,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231040162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:16,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:16,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:08:16,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800336928] [2024-06-04 16:08:16,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:16,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:08:16,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:16,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:08:16,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:08:16,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:08:16,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 297 transitions, 3721 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:16,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:16,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:08:16,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:17,042 INFO L124 PetriNetUnfolderBase]: 2454/4185 cut-off events. [2024-06-04 16:08:17,042 INFO L125 PetriNetUnfolderBase]: For 336272/336272 co-relation queries the response was YES. [2024-06-04 16:08:17,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29144 conditions, 4185 events. 2454/4185 cut-off events. For 336272/336272 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 26522 event pairs, 627 based on Foata normal form. 1/4184 useless extension candidates. Maximal degree in co-relation 29025. Up to 3298 conditions per place. [2024-06-04 16:08:17,087 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 170 selfloop transitions, 166 changer transitions 0/343 dead transitions. [2024-06-04 16:08:17,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 343 transitions, 5253 flow [2024-06-04 16:08:17,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:08:17,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:08:17,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 254 transitions. [2024-06-04 16:08:17,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5497835497835498 [2024-06-04 16:08:17,088 INFO L175 Difference]: Start difference. First operand has 251 places, 297 transitions, 3721 flow. Second operand 11 states and 254 transitions. [2024-06-04 16:08:17,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 343 transitions, 5253 flow [2024-06-04 16:08:17,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 343 transitions, 5104 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-04 16:08:17,816 INFO L231 Difference]: Finished difference. Result has 258 places, 311 transitions, 4211 flow [2024-06-04 16:08:17,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3572, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4211, PETRI_PLACES=258, PETRI_TRANSITIONS=311} [2024-06-04 16:08:17,817 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 215 predicate places. [2024-06-04 16:08:17,817 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 311 transitions, 4211 flow [2024-06-04 16:08:17,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:17,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:17,818 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 16:08:17,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-04 16:08:17,818 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 16:08:17,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:17,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1281955785, now seen corresponding path program 3 times [2024-06-04 16:08:17,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:17,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105260249] [2024-06-04 16:08:17,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:17,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:17,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:18,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:08:18,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:18,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105260249] [2024-06-04 16:08:18,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105260249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:18,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:18,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:08:18,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908025209] [2024-06-04 16:08:18,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:18,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:08:18,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:18,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:08:18,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:08:18,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:08:18,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 311 transitions, 4211 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:18,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:18,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:08:18,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:18,684 INFO L124 PetriNetUnfolderBase]: 2459/4198 cut-off events. [2024-06-04 16:08:18,685 INFO L125 PetriNetUnfolderBase]: For 350684/350684 co-relation queries the response was YES. [2024-06-04 16:08:18,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30393 conditions, 4198 events. 2459/4198 cut-off events. For 350684/350684 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 26645 event pairs, 629 based on Foata normal form. 1/4197 useless extension candidates. Maximal degree in co-relation 30271. Up to 3300 conditions per place. [2024-06-04 16:08:18,732 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 169 selfloop transitions, 166 changer transitions 0/342 dead transitions. [2024-06-04 16:08:18,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 342 transitions, 5552 flow [2024-06-04 16:08:18,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:08:18,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:08:18,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 233 transitions. [2024-06-04 16:08:18,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5547619047619048 [2024-06-04 16:08:18,733 INFO L175 Difference]: Start difference. First operand has 258 places, 311 transitions, 4211 flow. Second operand 10 states and 233 transitions. [2024-06-04 16:08:18,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 342 transitions, 5552 flow [2024-06-04 16:08:19,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 342 transitions, 5266 flow, removed 94 selfloop flow, removed 6 redundant places. [2024-06-04 16:08:19,686 INFO L231 Difference]: Finished difference. Result has 262 places, 314 transitions, 4352 flow [2024-06-04 16:08:19,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3951, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4352, PETRI_PLACES=262, PETRI_TRANSITIONS=314} [2024-06-04 16:08:19,686 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 219 predicate places. [2024-06-04 16:08:19,687 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 314 transitions, 4352 flow [2024-06-04 16:08:19,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:19,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:19,687 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 16:08:19,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-04 16:08:19,687 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 16:08:19,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:19,687 INFO L85 PathProgramCache]: Analyzing trace with hash -85845961, now seen corresponding path program 4 times [2024-06-04 16:08:19,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:19,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902641737] [2024-06-04 16:08:19,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:19,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:19,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:19,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:08:19,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:19,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902641737] [2024-06-04 16:08:19,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902641737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:19,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:19,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:08:19,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502252904] [2024-06-04 16:08:19,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:19,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:08:19,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:19,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:08:19,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:08:19,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:08:19,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 314 transitions, 4352 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:19,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:19,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:08:19,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:20,604 INFO L124 PetriNetUnfolderBase]: 2480/4226 cut-off events. [2024-06-04 16:08:20,604 INFO L125 PetriNetUnfolderBase]: For 351262/351262 co-relation queries the response was YES. [2024-06-04 16:08:20,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29340 conditions, 4226 events. 2480/4226 cut-off events. For 351262/351262 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 26786 event pairs, 625 based on Foata normal form. 2/4225 useless extension candidates. Maximal degree in co-relation 29218. Up to 3702 conditions per place. [2024-06-04 16:08:20,642 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 274 selfloop transitions, 67 changer transitions 0/348 dead transitions. [2024-06-04 16:08:20,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 348 transitions, 5358 flow [2024-06-04 16:08:20,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:08:20,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:08:20,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-04 16:08:20,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-04 16:08:20,643 INFO L175 Difference]: Start difference. First operand has 262 places, 314 transitions, 4352 flow. Second operand 7 states and 180 transitions. [2024-06-04 16:08:20,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 348 transitions, 5358 flow [2024-06-04 16:08:21,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 348 transitions, 5024 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-04 16:08:21,387 INFO L231 Difference]: Finished difference. Result has 264 places, 321 transitions, 4318 flow [2024-06-04 16:08:21,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4027, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4318, PETRI_PLACES=264, PETRI_TRANSITIONS=321} [2024-06-04 16:08:21,388 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 221 predicate places. [2024-06-04 16:08:21,388 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 321 transitions, 4318 flow [2024-06-04 16:08:21,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:21,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:21,388 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 16:08:21,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-04 16:08:21,388 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 16:08:21,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:21,389 INFO L85 PathProgramCache]: Analyzing trace with hash 432064567, now seen corresponding path program 5 times [2024-06-04 16:08:21,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:21,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294200287] [2024-06-04 16:08:21,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:21,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:21,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:21,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:08:21,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:21,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294200287] [2024-06-04 16:08:21,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294200287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:21,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:21,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:08:21,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516699494] [2024-06-04 16:08:21,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:21,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:08:21,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:21,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:08:21,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:08:21,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:08:21,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 321 transitions, 4318 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:21,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:21,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:08:21,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:22,243 INFO L124 PetriNetUnfolderBase]: 2485/4207 cut-off events. [2024-06-04 16:08:22,243 INFO L125 PetriNetUnfolderBase]: For 359215/359215 co-relation queries the response was YES. [2024-06-04 16:08:22,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29332 conditions, 4207 events. 2485/4207 cut-off events. For 359215/359215 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 26641 event pairs, 673 based on Foata normal form. 1/4199 useless extension candidates. Maximal degree in co-relation 29208. Up to 3324 conditions per place. [2024-06-04 16:08:22,287 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 186 selfloop transitions, 165 changer transitions 0/358 dead transitions. [2024-06-04 16:08:22,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 358 transitions, 5791 flow [2024-06-04 16:08:22,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:08:22,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:08:22,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 247 transitions. [2024-06-04 16:08:22,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5346320346320347 [2024-06-04 16:08:22,288 INFO L175 Difference]: Start difference. First operand has 264 places, 321 transitions, 4318 flow. Second operand 11 states and 247 transitions. [2024-06-04 16:08:22,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 358 transitions, 5791 flow [2024-06-04 16:08:22,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 358 transitions, 5689 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-04 16:08:22,954 INFO L231 Difference]: Finished difference. Result has 271 places, 331 transitions, 4819 flow [2024-06-04 16:08:22,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4216, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4819, PETRI_PLACES=271, PETRI_TRANSITIONS=331} [2024-06-04 16:08:22,954 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 228 predicate places. [2024-06-04 16:08:22,954 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 331 transitions, 4819 flow [2024-06-04 16:08:22,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:22,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:22,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:08:22,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-04 16:08:22,954 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 16:08:22,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:22,955 INFO L85 PathProgramCache]: Analyzing trace with hash 442540087, now seen corresponding path program 6 times [2024-06-04 16:08:22,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:22,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959108585] [2024-06-04 16:08:22,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:22,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:22,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:23,136 INFO 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 16:08:23,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:23,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959108585] [2024-06-04 16:08:23,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959108585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:23,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:23,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:08:23,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449491732] [2024-06-04 16:08:23,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:23,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:08:23,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:23,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:08:23,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:08:23,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:08:23,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 331 transitions, 4819 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:23,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:23,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:08:23,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:23,781 INFO L124 PetriNetUnfolderBase]: 2490/4216 cut-off events. [2024-06-04 16:08:23,781 INFO L125 PetriNetUnfolderBase]: For 371137/371137 co-relation queries the response was YES. [2024-06-04 16:08:23,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29931 conditions, 4216 events. 2490/4216 cut-off events. For 371137/371137 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 26708 event pairs, 673 based on Foata normal form. 1/4208 useless extension candidates. Maximal degree in co-relation 29806. Up to 3326 conditions per place. [2024-06-04 16:08:23,826 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 185 selfloop transitions, 165 changer transitions 0/357 dead transitions. [2024-06-04 16:08:23,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 357 transitions, 6119 flow [2024-06-04 16:08:23,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:08:23,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:08:23,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 228 transitions. [2024-06-04 16:08:23,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-06-04 16:08:23,827 INFO L175 Difference]: Start difference. First operand has 271 places, 331 transitions, 4819 flow. Second operand 10 states and 228 transitions. [2024-06-04 16:08:23,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 357 transitions, 6119 flow [2024-06-04 16:08:24,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 357 transitions, 5872 flow, removed 76 selfloop flow, removed 6 redundant places. [2024-06-04 16:08:24,752 INFO L231 Difference]: Finished difference. Result has 275 places, 334 transitions, 5004 flow [2024-06-04 16:08:24,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4600, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5004, PETRI_PLACES=275, PETRI_TRANSITIONS=334} [2024-06-04 16:08:24,753 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-04 16:08:24,753 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 334 transitions, 5004 flow [2024-06-04 16:08:24,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:24,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:24,753 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 16:08:24,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-04 16:08:24,753 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 16:08:24,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:24,753 INFO L85 PathProgramCache]: Analyzing trace with hash -390214375, now seen corresponding path program 7 times [2024-06-04 16:08:24,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:24,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414847475] [2024-06-04 16:08:24,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:24,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:24,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:24,937 INFO 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 16:08:24,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:24,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414847475] [2024-06-04 16:08:24,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414847475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:24,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:24,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:08:24,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686479268] [2024-06-04 16:08:24,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:24,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:08:24,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:24,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:08:24,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:08:24,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:08:24,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 334 transitions, 5004 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:24,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:24,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:08:24,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:25,657 INFO L124 PetriNetUnfolderBase]: 2508/4247 cut-off events. [2024-06-04 16:08:25,657 INFO L125 PetriNetUnfolderBase]: For 386958/386958 co-relation queries the response was YES. [2024-06-04 16:08:25,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30623 conditions, 4247 events. 2508/4247 cut-off events. For 386958/386958 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 26919 event pairs, 673 based on Foata normal form. 2/4240 useless extension candidates. Maximal degree in co-relation 30497. Up to 3338 conditions per place. [2024-06-04 16:08:25,702 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 190 selfloop transitions, 163 changer transitions 0/360 dead transitions. [2024-06-04 16:08:25,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 360 transitions, 6369 flow [2024-06-04 16:08:25,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:08:25,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:08:25,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-04 16:08:25,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5502645502645502 [2024-06-04 16:08:25,703 INFO L175 Difference]: Start difference. First operand has 275 places, 334 transitions, 5004 flow. Second operand 9 states and 208 transitions. [2024-06-04 16:08:25,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 360 transitions, 6369 flow [2024-06-04 16:08:26,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 360 transitions, 5998 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-04 16:08:26,400 INFO L231 Difference]: Finished difference. Result has 277 places, 341 transitions, 5127 flow [2024-06-04 16:08:26,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4643, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5127, PETRI_PLACES=277, PETRI_TRANSITIONS=341} [2024-06-04 16:08:26,400 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-04 16:08:26,400 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 341 transitions, 5127 flow [2024-06-04 16:08:26,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:26,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:26,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:08:26,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-04 16:08:26,401 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 16:08:26,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:26,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1381618293, now seen corresponding path program 8 times [2024-06-04 16:08:26,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:26,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472605808] [2024-06-04 16:08:26,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:26,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:26,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:26,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:08:26,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:26,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472605808] [2024-06-04 16:08:26,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472605808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:26,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:26,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:08:26,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075349388] [2024-06-04 16:08:26,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:26,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:08:26,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:26,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:08:26,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:08:26,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:08:26,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 341 transitions, 5127 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:26,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:26,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:08:26,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:27,262 INFO L124 PetriNetUnfolderBase]: 2526/4298 cut-off events. [2024-06-04 16:08:27,262 INFO L125 PetriNetUnfolderBase]: For 399018/399018 co-relation queries the response was YES. [2024-06-04 16:08:27,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31033 conditions, 4298 events. 2526/4298 cut-off events. For 399018/399018 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 27392 event pairs, 644 based on Foata normal form. 2/4297 useless extension candidates. Maximal degree in co-relation 30906. Up to 3558 conditions per place. [2024-06-04 16:08:27,310 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 246 selfloop transitions, 120 changer transitions 0/373 dead transitions. [2024-06-04 16:08:27,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 373 transitions, 6371 flow [2024-06-04 16:08:27,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:08:27,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:08:27,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-04 16:08:27,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-04 16:08:27,311 INFO L175 Difference]: Start difference. First operand has 277 places, 341 transitions, 5127 flow. Second operand 7 states and 179 transitions. [2024-06-04 16:08:27,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 373 transitions, 6371 flow [2024-06-04 16:08:28,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 373 transitions, 5990 flow, removed 54 selfloop flow, removed 5 redundant places. [2024-06-04 16:08:28,236 INFO L231 Difference]: Finished difference. Result has 280 places, 347 transitions, 5193 flow [2024-06-04 16:08:28,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4758, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5193, PETRI_PLACES=280, PETRI_TRANSITIONS=347} [2024-06-04 16:08:28,237 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 237 predicate places. [2024-06-04 16:08:28,237 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 347 transitions, 5193 flow [2024-06-04 16:08:28,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:28,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:28,237 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 16:08:28,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-04 16:08:28,238 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 16:08:28,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:28,238 INFO L85 PathProgramCache]: Analyzing trace with hash 95936054, now seen corresponding path program 1 times [2024-06-04 16:08:28,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:28,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017436989] [2024-06-04 16:08:28,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:28,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:28,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:28,489 INFO 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 16:08:28,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:28,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017436989] [2024-06-04 16:08:28,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017436989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:28,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:28,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:08:28,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695039115] [2024-06-04 16:08:28,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:28,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:08:28,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:28,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:08:28,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:08:28,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:08:28,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 347 transitions, 5193 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 16:08:28,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:28,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:08:28,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:29,327 INFO L124 PetriNetUnfolderBase]: 2751/4699 cut-off events. [2024-06-04 16:08:29,328 INFO L125 PetriNetUnfolderBase]: For 537888/537892 co-relation queries the response was YES. [2024-06-04 16:08:29,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35806 conditions, 4699 events. 2751/4699 cut-off events. For 537888/537892 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 30626 event pairs, 639 based on Foata normal form. 16/4713 useless extension candidates. Maximal degree in co-relation 35677. Up to 3434 conditions per place. [2024-06-04 16:08:29,384 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 266 selfloop transitions, 114 changer transitions 0/387 dead transitions. [2024-06-04 16:08:29,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 387 transitions, 6567 flow [2024-06-04 16:08:29,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:08:29,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:08:29,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-04 16:08:29,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5582010582010583 [2024-06-04 16:08:29,385 INFO L175 Difference]: Start difference. First operand has 280 places, 347 transitions, 5193 flow. Second operand 9 states and 211 transitions. [2024-06-04 16:08:29,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 387 transitions, 6567 flow [2024-06-04 16:08:30,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 387 transitions, 6441 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-04 16:08:30,431 INFO L231 Difference]: Finished difference. Result has 288 places, 353 transitions, 5477 flow [2024-06-04 16:08:30,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5067, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5477, PETRI_PLACES=288, PETRI_TRANSITIONS=353} [2024-06-04 16:08:30,431 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 245 predicate places. [2024-06-04 16:08:30,431 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 353 transitions, 5477 flow [2024-06-04 16:08:30,431 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 16:08:30,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:30,431 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 16:08:30,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-04 16:08:30,432 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 16:08:30,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:30,432 INFO L85 PathProgramCache]: Analyzing trace with hash -415672138, now seen corresponding path program 2 times [2024-06-04 16:08:30,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:30,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668203600] [2024-06-04 16:08:30,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:30,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:30,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:30,649 INFO 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 16:08:30,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:30,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668203600] [2024-06-04 16:08:30,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668203600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:30,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:30,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:08:30,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783374201] [2024-06-04 16:08:30,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:30,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:08:30,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:30,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:08:30,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:08:30,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:08:30,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 353 transitions, 5477 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 16:08:30,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:30,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:08:30,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:31,497 INFO L124 PetriNetUnfolderBase]: 2903/4931 cut-off events. [2024-06-04 16:08:31,497 INFO L125 PetriNetUnfolderBase]: For 613008/613012 co-relation queries the response was YES. [2024-06-04 16:08:31,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39461 conditions, 4931 events. 2903/4931 cut-off events. For 613008/613012 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 32241 event pairs, 748 based on Foata normal form. 16/4945 useless extension candidates. Maximal degree in co-relation 39329. Up to 4038 conditions per place. [2024-06-04 16:08:31,555 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 270 selfloop transitions, 105 changer transitions 0/382 dead transitions. [2024-06-04 16:08:31,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 382 transitions, 6589 flow [2024-06-04 16:08:31,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:08:31,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:08:31,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 205 transitions. [2024-06-04 16:08:31,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5423280423280423 [2024-06-04 16:08:31,556 INFO L175 Difference]: Start difference. First operand has 288 places, 353 transitions, 5477 flow. Second operand 9 states and 205 transitions. [2024-06-04 16:08:31,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 382 transitions, 6589 flow [2024-06-04 16:08:32,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 382 transitions, 6426 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-04 16:08:32,776 INFO L231 Difference]: Finished difference. Result has 294 places, 357 transitions, 5639 flow [2024-06-04 16:08:32,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5314, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5639, PETRI_PLACES=294, PETRI_TRANSITIONS=357} [2024-06-04 16:08:32,777 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2024-06-04 16:08:32,777 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 357 transitions, 5639 flow [2024-06-04 16:08:32,777 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 16:08:32,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:32,777 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 16:08:32,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-04 16:08:32,777 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 16:08:32,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:32,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1217190414, now seen corresponding path program 3 times [2024-06-04 16:08:32,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:32,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443617379] [2024-06-04 16:08:32,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:32,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:32,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:32,980 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 16:08:32,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:32,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443617379] [2024-06-04 16:08:32,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443617379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:32,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:32,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:08:32,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599501154] [2024-06-04 16:08:32,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:32,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:08:32,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:32,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:08:32,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:08:33,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:08:33,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 357 transitions, 5639 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 16:08:33,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:33,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:08:33,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:33,919 INFO L124 PetriNetUnfolderBase]: 2913/4961 cut-off events. [2024-06-04 16:08:33,919 INFO L125 PetriNetUnfolderBase]: For 615264/615268 co-relation queries the response was YES. [2024-06-04 16:08:33,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39354 conditions, 4961 events. 2913/4961 cut-off events. For 615264/615268 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 32565 event pairs, 769 based on Foata normal form. 20/4979 useless extension candidates. Maximal degree in co-relation 39219. Up to 4212 conditions per place. [2024-06-04 16:08:33,971 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 265 selfloop transitions, 107 changer transitions 0/379 dead transitions. [2024-06-04 16:08:33,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 379 transitions, 6501 flow [2024-06-04 16:08:33,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:08:33,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:08:33,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-04 16:08:33,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5343915343915344 [2024-06-04 16:08:33,972 INFO L175 Difference]: Start difference. First operand has 294 places, 357 transitions, 5639 flow. Second operand 9 states and 202 transitions. [2024-06-04 16:08:33,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 379 transitions, 6501 flow [2024-06-04 16:08:35,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 379 transitions, 6336 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-04 16:08:35,512 INFO L231 Difference]: Finished difference. Result has 298 places, 359 transitions, 5752 flow [2024-06-04 16:08:35,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5474, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5752, PETRI_PLACES=298, PETRI_TRANSITIONS=359} [2024-06-04 16:08:35,512 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 255 predicate places. [2024-06-04 16:08:35,512 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 359 transitions, 5752 flow [2024-06-04 16:08:35,512 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 16:08:35,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:35,512 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 16:08:35,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-04 16:08:35,513 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 16:08:35,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:35,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1355718564, now seen corresponding path program 4 times [2024-06-04 16:08:35,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:35,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862790261] [2024-06-04 16:08:35,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:35,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:35,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:35,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:08:35,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:35,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862790261] [2024-06-04 16:08:35,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862790261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:35,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:35,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:08:35,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796240621] [2024-06-04 16:08:35,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:35,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:08:35,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:35,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:08:35,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:08:35,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:08:35,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 359 transitions, 5752 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 16:08:35,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:35,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:08:35,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:36,662 INFO L124 PetriNetUnfolderBase]: 2969/5030 cut-off events. [2024-06-04 16:08:36,663 INFO L125 PetriNetUnfolderBase]: For 636156/636156 co-relation queries the response was YES. [2024-06-04 16:08:36,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40281 conditions, 5030 events. 2969/5030 cut-off events. For 636156/636156 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 32986 event pairs, 773 based on Foata normal form. 16/5041 useless extension candidates. Maximal degree in co-relation 40144. Up to 4431 conditions per place. [2024-06-04 16:08:36,724 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 312 selfloop transitions, 61 changer transitions 0/380 dead transitions. [2024-06-04 16:08:36,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 380 transitions, 6615 flow [2024-06-04 16:08:36,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:08:36,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:08:36,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-04 16:08:36,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5386904761904762 [2024-06-04 16:08:36,725 INFO L175 Difference]: Start difference. First operand has 298 places, 359 transitions, 5752 flow. Second operand 8 states and 181 transitions. [2024-06-04 16:08:36,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 380 transitions, 6615 flow [2024-06-04 16:08:38,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 380 transitions, 6369 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-04 16:08:38,311 INFO L231 Difference]: Finished difference. Result has 299 places, 361 transitions, 5693 flow [2024-06-04 16:08:38,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5506, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5693, PETRI_PLACES=299, PETRI_TRANSITIONS=361} [2024-06-04 16:08:38,311 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 256 predicate places. [2024-06-04 16:08:38,311 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 361 transitions, 5693 flow [2024-06-04 16:08:38,311 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 16:08:38,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:38,311 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 16:08:38,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-04 16:08:38,311 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 16:08:38,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:38,312 INFO L85 PathProgramCache]: Analyzing trace with hash -536439212, now seen corresponding path program 5 times [2024-06-04 16:08:38,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:38,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651356409] [2024-06-04 16:08:38,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:38,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:38,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:38,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:08:38,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:38,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651356409] [2024-06-04 16:08:38,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651356409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:38,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:38,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:08:38,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762674007] [2024-06-04 16:08:38,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:38,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:08:38,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:38,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:08:38,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:08:38,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:08:38,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 361 transitions, 5693 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 16:08:38,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:38,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:08:38,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:39,505 INFO L124 PetriNetUnfolderBase]: 3108/5277 cut-off events. [2024-06-04 16:08:39,505 INFO L125 PetriNetUnfolderBase]: For 692154/692154 co-relation queries the response was YES. [2024-06-04 16:08:39,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43157 conditions, 5277 events. 3108/5277 cut-off events. For 692154/692154 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 35115 event pairs, 820 based on Foata normal form. 12/5284 useless extension candidates. Maximal degree in co-relation 43019. Up to 4275 conditions per place. [2024-06-04 16:08:39,574 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 273 selfloop transitions, 111 changer transitions 0/391 dead transitions. [2024-06-04 16:08:39,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 391 transitions, 6853 flow [2024-06-04 16:08:39,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:08:39,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:08:39,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-04 16:08:39,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-04 16:08:39,575 INFO L175 Difference]: Start difference. First operand has 299 places, 361 transitions, 5693 flow. Second operand 10 states and 225 transitions. [2024-06-04 16:08:39,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 391 transitions, 6853 flow [2024-06-04 16:08:40,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 391 transitions, 6713 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-04 16:08:40,715 INFO L231 Difference]: Finished difference. Result has 305 places, 365 transitions, 5911 flow [2024-06-04 16:08:40,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5553, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5911, PETRI_PLACES=305, PETRI_TRANSITIONS=365} [2024-06-04 16:08:40,716 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 262 predicate places. [2024-06-04 16:08:40,716 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 365 transitions, 5911 flow [2024-06-04 16:08:40,716 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 16:08:40,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:40,716 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 16:08:40,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-04 16:08:40,716 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 16:08:40,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:40,716 INFO L85 PathProgramCache]: Analyzing trace with hash -530928962, now seen corresponding path program 6 times [2024-06-04 16:08:40,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:40,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318415477] [2024-06-04 16:08:40,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:40,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:40,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:40,945 INFO 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 16:08:40,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:40,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318415477] [2024-06-04 16:08:40,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318415477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:40,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:40,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:08:40,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816960030] [2024-06-04 16:08:40,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:40,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:08:40,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:40,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:08:40,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:08:41,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:08:41,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 365 transitions, 5911 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 16:08:41,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:41,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:08:41,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:41,937 INFO L124 PetriNetUnfolderBase]: 3118/5291 cut-off events. [2024-06-04 16:08:41,937 INFO L125 PetriNetUnfolderBase]: For 697587/697587 co-relation queries the response was YES. [2024-06-04 16:08:41,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42876 conditions, 5291 events. 3118/5291 cut-off events. For 697587/697587 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 35196 event pairs, 822 based on Foata normal form. 16/5302 useless extension candidates. Maximal degree in co-relation 42735. Up to 4535 conditions per place. [2024-06-04 16:08:42,005 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 264 selfloop transitions, 119 changer transitions 0/390 dead transitions. [2024-06-04 16:08:42,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 390 transitions, 6811 flow [2024-06-04 16:08:42,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:08:42,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:08:42,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 260 transitions. [2024-06-04 16:08:42,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158730158730159 [2024-06-04 16:08:42,006 INFO L175 Difference]: Start difference. First operand has 305 places, 365 transitions, 5911 flow. Second operand 12 states and 260 transitions. [2024-06-04 16:08:42,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 390 transitions, 6811 flow [2024-06-04 16:08:43,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 390 transitions, 6669 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-04 16:08:43,254 INFO L231 Difference]: Finished difference. Result has 312 places, 367 transitions, 6081 flow [2024-06-04 16:08:43,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5771, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6081, PETRI_PLACES=312, PETRI_TRANSITIONS=367} [2024-06-04 16:08:43,255 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-04 16:08:43,255 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 367 transitions, 6081 flow [2024-06-04 16:08:43,255 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 16:08:43,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:43,255 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 16:08:43,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-04 16:08:43,255 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 16:08:43,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:43,255 INFO L85 PathProgramCache]: Analyzing trace with hash -530713760, now seen corresponding path program 1 times [2024-06-04 16:08:43,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:43,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838753169] [2024-06-04 16:08:43,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:43,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:43,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:43,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:08:43,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:43,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838753169] [2024-06-04 16:08:43,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838753169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:43,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:43,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:08:43,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162443149] [2024-06-04 16:08:43,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:43,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:08:43,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:43,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:08:43,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:08:43,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:08:43,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 367 transitions, 6081 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 16:08:43,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:43,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:08:43,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:44,459 INFO L124 PetriNetUnfolderBase]: 3125/5310 cut-off events. [2024-06-04 16:08:44,459 INFO L125 PetriNetUnfolderBase]: For 672479/672479 co-relation queries the response was YES. [2024-06-04 16:08:44,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42600 conditions, 5310 events. 3125/5310 cut-off events. For 672479/672479 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 35382 event pairs, 811 based on Foata normal form. 12/5317 useless extension candidates. Maximal degree in co-relation 42457. Up to 4424 conditions per place. [2024-06-04 16:08:44,521 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 262 selfloop transitions, 126 changer transitions 0/395 dead transitions. [2024-06-04 16:08:44,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 395 transitions, 6999 flow [2024-06-04 16:08:44,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:08:44,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:08:44,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 262 transitions. [2024-06-04 16:08:44,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5198412698412699 [2024-06-04 16:08:44,522 INFO L175 Difference]: Start difference. First operand has 312 places, 367 transitions, 6081 flow. Second operand 12 states and 262 transitions. [2024-06-04 16:08:44,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 395 transitions, 6999 flow [2024-06-04 16:08:46,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 395 transitions, 6721 flow, removed 22 selfloop flow, removed 10 redundant places. [2024-06-04 16:08:46,307 INFO L231 Difference]: Finished difference. Result has 314 places, 369 transitions, 6122 flow [2024-06-04 16:08:46,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5803, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6122, PETRI_PLACES=314, PETRI_TRANSITIONS=369} [2024-06-04 16:08:46,307 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-04 16:08:46,307 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 369 transitions, 6122 flow [2024-06-04 16:08:46,307 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 16:08:46,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:46,307 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 16:08:46,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-04 16:08:46,308 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 16:08:46,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:46,308 INFO L85 PathProgramCache]: Analyzing trace with hash -953718702, now seen corresponding path program 7 times [2024-06-04 16:08:46,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:46,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037880309] [2024-06-04 16:08:46,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:46,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:46,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:46,521 INFO 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 16:08:46,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:46,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037880309] [2024-06-04 16:08:46,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037880309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:46,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:46,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:08:46,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147120741] [2024-06-04 16:08:46,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:46,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:08:46,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:46,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:08:46,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:08:46,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:08:46,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 369 transitions, 6122 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 16:08:46,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:46,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:08:46,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:47,605 INFO L124 PetriNetUnfolderBase]: 3257/5525 cut-off events. [2024-06-04 16:08:47,605 INFO L125 PetriNetUnfolderBase]: For 796177/796177 co-relation queries the response was YES. [2024-06-04 16:08:47,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43681 conditions, 5525 events. 3257/5525 cut-off events. For 796177/796177 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 37114 event pairs, 858 based on Foata normal form. 42/5564 useless extension candidates. Maximal degree in co-relation 43537. Up to 4649 conditions per place. [2024-06-04 16:08:47,672 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 281 selfloop transitions, 97 changer transitions 7/392 dead transitions. [2024-06-04 16:08:47,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 392 transitions, 7017 flow [2024-06-04 16:08:47,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:08:47,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:08:47,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-04 16:08:47,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684523809523809 [2024-06-04 16:08:47,673 INFO L175 Difference]: Start difference. First operand has 314 places, 369 transitions, 6122 flow. Second operand 8 states and 191 transitions. [2024-06-04 16:08:47,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 392 transitions, 7017 flow [2024-06-04 16:08:49,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 392 transitions, 6716 flow, removed 26 selfloop flow, removed 10 redundant places. [2024-06-04 16:08:49,320 INFO L231 Difference]: Finished difference. Result has 312 places, 366 transitions, 5999 flow [2024-06-04 16:08:49,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5821, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5999, PETRI_PLACES=312, PETRI_TRANSITIONS=366} [2024-06-04 16:08:49,320 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-04 16:08:49,320 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 366 transitions, 5999 flow [2024-06-04 16:08:49,320 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 16:08:49,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:49,321 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 16:08:49,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-04 16:08:49,321 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 16:08:49,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:49,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1258908628, now seen corresponding path program 8 times [2024-06-04 16:08:49,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:49,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675203231] [2024-06-04 16:08:49,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:49,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:49,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:49,549 INFO 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 16:08:49,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:49,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675203231] [2024-06-04 16:08:49,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675203231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:49,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:49,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:08:49,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267773246] [2024-06-04 16:08:49,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:49,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:08:49,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:49,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:08:49,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:08:49,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:08:49,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 366 transitions, 5999 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 16:08:49,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:49,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:08:49,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:50,478 INFO L124 PetriNetUnfolderBase]: 3199/5445 cut-off events. [2024-06-04 16:08:50,478 INFO L125 PetriNetUnfolderBase]: For 745671/745671 co-relation queries the response was YES. [2024-06-04 16:08:50,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41404 conditions, 5445 events. 3199/5445 cut-off events. For 745671/745671 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 36493 event pairs, 850 based on Foata normal form. 42/5484 useless extension candidates. Maximal degree in co-relation 41259. Up to 4572 conditions per place. [2024-06-04 16:08:50,544 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 288 selfloop transitions, 89 changer transitions 6/390 dead transitions. [2024-06-04 16:08:50,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 390 transitions, 6876 flow [2024-06-04 16:08:50,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:08:50,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:08:50,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-04 16:08:50,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5918367346938775 [2024-06-04 16:08:50,545 INFO L175 Difference]: Start difference. First operand has 312 places, 366 transitions, 5999 flow. Second operand 7 states and 174 transitions. [2024-06-04 16:08:50,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 390 transitions, 6876 flow [2024-06-04 16:08:52,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 390 transitions, 6658 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-04 16:08:52,169 INFO L231 Difference]: Finished difference. Result has 313 places, 363 transitions, 5930 flow [2024-06-04 16:08:52,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5781, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5930, PETRI_PLACES=313, PETRI_TRANSITIONS=363} [2024-06-04 16:08:52,170 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 270 predicate places. [2024-06-04 16:08:52,170 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 363 transitions, 5930 flow [2024-06-04 16:08:52,170 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 16:08:52,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:52,170 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 16:08:52,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-04 16:08:52,171 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 16:08:52,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:52,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1324514492, now seen corresponding path program 9 times [2024-06-04 16:08:52,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:52,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129974904] [2024-06-04 16:08:52,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:52,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:52,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:52,388 INFO 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 16:08:52,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:52,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129974904] [2024-06-04 16:08:52,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129974904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:52,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:52,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:08:52,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723802483] [2024-06-04 16:08:52,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:52,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:08:52,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:52,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:08:52,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:08:52,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:08:52,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 363 transitions, 5930 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 16:08:52,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:52,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:08:52,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:53,287 INFO L124 PetriNetUnfolderBase]: 3198/5476 cut-off events. [2024-06-04 16:08:53,287 INFO L125 PetriNetUnfolderBase]: For 717242/717242 co-relation queries the response was YES. [2024-06-04 16:08:53,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40918 conditions, 5476 events. 3198/5476 cut-off events. For 717242/717242 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 36990 event pairs, 711 based on Foata normal form. 36/5509 useless extension candidates. Maximal degree in co-relation 40772. Up to 4008 conditions per place. [2024-06-04 16:08:53,357 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 291 selfloop transitions, 93 changer transitions 7/398 dead transitions. [2024-06-04 16:08:53,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 398 transitions, 7071 flow [2024-06-04 16:08:53,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:08:53,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:08:53,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-04 16:08:53,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6224489795918368 [2024-06-04 16:08:53,358 INFO L175 Difference]: Start difference. First operand has 313 places, 363 transitions, 5930 flow. Second operand 7 states and 183 transitions. [2024-06-04 16:08:53,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 398 transitions, 7071 flow [2024-06-04 16:08:54,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 398 transitions, 6865 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-04 16:08:54,875 INFO L231 Difference]: Finished difference. Result has 316 places, 361 transitions, 5916 flow [2024-06-04 16:08:54,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5724, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5916, PETRI_PLACES=316, PETRI_TRANSITIONS=361} [2024-06-04 16:08:54,876 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 273 predicate places. [2024-06-04 16:08:54,876 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 361 transitions, 5916 flow [2024-06-04 16:08:54,876 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 16:08:54,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:54,876 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 16:08:54,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-04 16:08:54,876 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 16:08:54,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:54,877 INFO L85 PathProgramCache]: Analyzing trace with hash -260512732, now seen corresponding path program 2 times [2024-06-04 16:08:54,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:54,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904105731] [2024-06-04 16:08:54,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:54,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:54,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:55,102 INFO 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 16:08:55,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:55,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904105731] [2024-06-04 16:08:55,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904105731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:55,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:55,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:08:55,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236769704] [2024-06-04 16:08:55,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:55,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:08:55,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:55,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:08:55,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:08:55,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:08:55,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 361 transitions, 5916 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 16:08:55,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:55,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:08:55,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:56,078 INFO L124 PetriNetUnfolderBase]: 2952/5050 cut-off events. [2024-06-04 16:08:56,078 INFO L125 PetriNetUnfolderBase]: For 590718/590718 co-relation queries the response was YES. [2024-06-04 16:08:56,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36231 conditions, 5050 events. 2952/5050 cut-off events. For 590718/590718 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 33717 event pairs, 634 based on Foata normal form. 36/5083 useless extension candidates. Maximal degree in co-relation 36083. Up to 3838 conditions per place. [2024-06-04 16:08:56,131 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 272 selfloop transitions, 95 changer transitions 15/389 dead transitions. [2024-06-04 16:08:56,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 389 transitions, 6817 flow [2024-06-04 16:08:56,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:08:56,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:08:56,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-04 16:08:56,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-04 16:08:56,132 INFO L175 Difference]: Start difference. First operand has 316 places, 361 transitions, 5916 flow. Second operand 8 states and 196 transitions. [2024-06-04 16:08:56,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 389 transitions, 6817 flow [2024-06-04 16:08:57,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 389 transitions, 6325 flow, removed 49 selfloop flow, removed 9 redundant places. [2024-06-04 16:08:57,776 INFO L231 Difference]: Finished difference. Result has 315 places, 352 transitions, 5485 flow [2024-06-04 16:08:57,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5432, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5485, PETRI_PLACES=315, PETRI_TRANSITIONS=352} [2024-06-04 16:08:57,776 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 272 predicate places. [2024-06-04 16:08:57,776 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 352 transitions, 5485 flow [2024-06-04 16:08:57,777 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 16:08:57,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:57,777 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 16:08:57,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-04 16:08:57,777 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 16:08:57,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:57,777 INFO L85 PathProgramCache]: Analyzing trace with hash -121803464, now seen corresponding path program 1 times [2024-06-04 16:08:57,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:57,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829626921] [2024-06-04 16:08:57,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:57,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:57,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:57,982 INFO 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 16:08:57,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:57,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829626921] [2024-06-04 16:08:57,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829626921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:57,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:57,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:08:57,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604741503] [2024-06-04 16:08:57,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:57,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:08:57,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:57,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:08:57,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:08:58,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:08:58,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 352 transitions, 5485 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 16:08:58,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:58,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:08:58,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:58,830 INFO L124 PetriNetUnfolderBase]: 2760/4731 cut-off events. [2024-06-04 16:08:58,830 INFO L125 PetriNetUnfolderBase]: For 458656/458656 co-relation queries the response was YES. [2024-06-04 16:08:58,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33762 conditions, 4731 events. 2760/4731 cut-off events. For 458656/458656 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 31143 event pairs, 621 based on Foata normal form. 1/4730 useless extension candidates. Maximal degree in co-relation 33616. Up to 4226 conditions per place. [2024-06-04 16:08:58,894 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 345 selfloop transitions, 36 changer transitions 0/388 dead transitions. [2024-06-04 16:08:58,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 388 transitions, 6551 flow [2024-06-04 16:08:58,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:08:58,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:08:58,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 226 transitions. [2024-06-04 16:08:58,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5380952380952381 [2024-06-04 16:08:58,895 INFO L175 Difference]: Start difference. First operand has 315 places, 352 transitions, 5485 flow. Second operand 10 states and 226 transitions. [2024-06-04 16:08:58,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 388 transitions, 6551 flow [2024-06-04 16:09:00,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 388 transitions, 6284 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-04 16:09:00,126 INFO L231 Difference]: Finished difference. Result has 319 places, 355 transitions, 5342 flow [2024-06-04 16:09:00,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5220, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5342, PETRI_PLACES=319, PETRI_TRANSITIONS=355} [2024-06-04 16:09:00,127 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 276 predicate places. [2024-06-04 16:09:00,127 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 355 transitions, 5342 flow [2024-06-04 16:09:00,127 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 16:09:00,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:09:00,127 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] [2024-06-04 16:09:00,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-04 16:09:00,127 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 16:09:00,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:09:00,128 INFO L85 PathProgramCache]: Analyzing trace with hash 303185336, now seen corresponding path program 2 times [2024-06-04 16:09:00,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:09:00,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167231595] [2024-06-04 16:09:00,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:09:00,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:09:00,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:09:00,331 INFO 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 16:09:00,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:09:00,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167231595] [2024-06-04 16:09:00,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167231595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:09:00,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:09:00,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:09:00,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059151962] [2024-06-04 16:09:00,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:09:00,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:09:00,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:09:00,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:09:00,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:09:00,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:09:00,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 355 transitions, 5342 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 16:09:00,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:09:00,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:09:00,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:09:01,170 INFO L124 PetriNetUnfolderBase]: 2757/4727 cut-off events. [2024-06-04 16:09:01,170 INFO L125 PetriNetUnfolderBase]: For 452441/452441 co-relation queries the response was YES. [2024-06-04 16:09:01,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33227 conditions, 4727 events. 2757/4727 cut-off events. For 452441/452441 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 31175 event pairs, 621 based on Foata normal form. 1/4726 useless extension candidates. Maximal degree in co-relation 33080. Up to 4223 conditions per place. [2024-06-04 16:09:01,226 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 344 selfloop transitions, 35 changer transitions 0/386 dead transitions. [2024-06-04 16:09:01,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 386 transitions, 6178 flow [2024-06-04 16:09:01,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:09:01,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:09:01,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-04 16:09:01,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5502645502645502 [2024-06-04 16:09:01,227 INFO L175 Difference]: Start difference. First operand has 319 places, 355 transitions, 5342 flow. Second operand 9 states and 208 transitions. [2024-06-04 16:09:01,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 386 transitions, 6178 flow [2024-06-04 16:09:02,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 386 transitions, 6074 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-04 16:09:02,819 INFO L231 Difference]: Finished difference. Result has 320 places, 355 transitions, 5314 flow [2024-06-04 16:09:02,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5238, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5314, PETRI_PLACES=320, PETRI_TRANSITIONS=355} [2024-06-04 16:09:02,819 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-04 16:09:02,819 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 355 transitions, 5314 flow [2024-06-04 16:09:02,819 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 16:09:02,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:09:02,819 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 16:09:02,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-04 16:09:02,819 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 16:09:02,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:09:02,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1887495590, now seen corresponding path program 1 times [2024-06-04 16:09:02,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:09:02,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559059699] [2024-06-04 16:09:02,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:09:02,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:09:02,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:09:03,009 INFO 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 16:09:03,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:09:03,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559059699] [2024-06-04 16:09:03,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559059699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:09:03,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:09:03,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:09:03,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103179447] [2024-06-04 16:09:03,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:09:03,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:09:03,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:09:03,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:09:03,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:09:03,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:09:03,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 355 transitions, 5314 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:03,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:09:03,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:09:03,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:09:03,775 INFO L124 PetriNetUnfolderBase]: 2770/4740 cut-off events. [2024-06-04 16:09:03,775 INFO L125 PetriNetUnfolderBase]: For 467175/467175 co-relation queries the response was YES. [2024-06-04 16:09:03,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33549 conditions, 4740 events. 2770/4740 cut-off events. For 467175/467175 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 31280 event pairs, 639 based on Foata normal form. 1/4738 useless extension candidates. Maximal degree in co-relation 33401. Up to 3990 conditions per place. [2024-06-04 16:09:03,832 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 249 selfloop transitions, 123 changer transitions 0/379 dead transitions. [2024-06-04 16:09:03,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 379 transitions, 6397 flow [2024-06-04 16:09:03,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:09:03,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:09:03,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-04 16:09:03,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-04 16:09:03,833 INFO L175 Difference]: Start difference. First operand has 320 places, 355 transitions, 5314 flow. Second operand 7 states and 173 transitions. [2024-06-04 16:09:03,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 379 transitions, 6397 flow [2024-06-04 16:09:05,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 379 transitions, 6327 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-04 16:09:05,567 INFO L231 Difference]: Finished difference. Result has 320 places, 361 transitions, 5710 flow [2024-06-04 16:09:05,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5244, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5710, PETRI_PLACES=320, PETRI_TRANSITIONS=361} [2024-06-04 16:09:05,568 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-04 16:09:05,568 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 361 transitions, 5710 flow [2024-06-04 16:09:05,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:05,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:09:05,568 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 16:09:05,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-04 16:09:05,568 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 16:09:05,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:09:05,568 INFO L85 PathProgramCache]: Analyzing trace with hash -97231670, now seen corresponding path program 3 times [2024-06-04 16:09:05,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:09:05,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972391899] [2024-06-04 16:09:05,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:09:05,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:09:05,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:09:05,759 INFO 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 16:09:05,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:09:05,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972391899] [2024-06-04 16:09:05,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972391899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:09:05,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:09:05,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:09:05,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188215402] [2024-06-04 16:09:05,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:09:05,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:09:05,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:09:05,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:09:05,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:09:05,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:09:05,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 361 transitions, 5710 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 16:09:05,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:09:05,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:09:05,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:09:06,618 INFO L124 PetriNetUnfolderBase]: 2824/4831 cut-off events. [2024-06-04 16:09:06,618 INFO L125 PetriNetUnfolderBase]: For 500966/500966 co-relation queries the response was YES. [2024-06-04 16:09:06,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35376 conditions, 4831 events. 2824/4831 cut-off events. For 500966/500966 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 31969 event pairs, 617 based on Foata normal form. 1/4830 useless extension candidates. Maximal degree in co-relation 35226. Up to 4135 conditions per place. [2024-06-04 16:09:06,683 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 293 selfloop transitions, 115 changer transitions 0/415 dead transitions. [2024-06-04 16:09:06,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 415 transitions, 7676 flow [2024-06-04 16:09:06,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:09:06,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:09:06,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 228 transitions. [2024-06-04 16:09:06,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-06-04 16:09:06,684 INFO L175 Difference]: Start difference. First operand has 320 places, 361 transitions, 5710 flow. Second operand 10 states and 228 transitions. [2024-06-04 16:09:06,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 415 transitions, 7676 flow [2024-06-04 16:09:08,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 415 transitions, 7451 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-04 16:09:08,405 INFO L231 Difference]: Finished difference. Result has 326 places, 384 transitions, 6282 flow [2024-06-04 16:09:08,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5499, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6282, PETRI_PLACES=326, PETRI_TRANSITIONS=384} [2024-06-04 16:09:08,406 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-04 16:09:08,406 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 384 transitions, 6282 flow [2024-06-04 16:09:08,406 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 16:09:08,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:09:08,406 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] [2024-06-04 16:09:08,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-04 16:09:08,406 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 16:09:08,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:09:08,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1790424286, now seen corresponding path program 4 times [2024-06-04 16:09:08,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:09:08,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793521929] [2024-06-04 16:09:08,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:09:08,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:09:08,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:09:08,584 INFO 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 16:09:08,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:09:08,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793521929] [2024-06-04 16:09:08,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793521929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:09:08,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:09:08,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:09:08,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26791029] [2024-06-04 16:09:08,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:09:08,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:09:08,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:09:08,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:09:08,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:09:08,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:09:08,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 384 transitions, 6282 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:08,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:09:08,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:09:08,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:09:09,494 INFO L124 PetriNetUnfolderBase]: 2869/4906 cut-off events. [2024-06-04 16:09:09,494 INFO L125 PetriNetUnfolderBase]: For 524727/524727 co-relation queries the response was YES. [2024-06-04 16:09:09,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36534 conditions, 4906 events. 2869/4906 cut-off events. For 524727/524727 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 32483 event pairs, 615 based on Foata normal form. 1/4905 useless extension candidates. Maximal degree in co-relation 36383. Up to 3846 conditions per place. [2024-06-04 16:09:09,552 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 193 selfloop transitions, 224 changer transitions 0/424 dead transitions. [2024-06-04 16:09:09,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 424 transitions, 8203 flow [2024-06-04 16:09:09,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:09:09,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:09:09,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 234 transitions. [2024-06-04 16:09:09,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5571428571428572 [2024-06-04 16:09:09,553 INFO L175 Difference]: Start difference. First operand has 326 places, 384 transitions, 6282 flow. Second operand 10 states and 234 transitions. [2024-06-04 16:09:09,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 424 transitions, 8203 flow [2024-06-04 16:09:11,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 424 transitions, 7985 flow, removed 79 selfloop flow, removed 4 redundant places. [2024-06-04 16:09:11,392 INFO L231 Difference]: Finished difference. Result has 332 places, 397 transitions, 6813 flow [2024-06-04 16:09:11,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6100, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6813, PETRI_PLACES=332, PETRI_TRANSITIONS=397} [2024-06-04 16:09:11,392 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 289 predicate places. [2024-06-04 16:09:11,392 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 397 transitions, 6813 flow [2024-06-04 16:09:11,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:11,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:09:11,393 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 16:09:11,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-04 16:09:11,393 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 16:09:11,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:09:11,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1410783828, now seen corresponding path program 5 times [2024-06-04 16:09:11,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:09:11,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596389801] [2024-06-04 16:09:11,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:09:11,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:09:11,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:09:11,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:09:11,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:09:11,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596389801] [2024-06-04 16:09:11,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596389801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:09:11,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:09:11,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:09:11,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148698434] [2024-06-04 16:09:11,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:09:11,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:09:11,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:09:11,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:09:11,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:09:11,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:09:11,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 397 transitions, 6813 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 16:09:11,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:09:11,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:09:11,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:09:12,529 INFO L124 PetriNetUnfolderBase]: 2898/4955 cut-off events. [2024-06-04 16:09:12,529 INFO L125 PetriNetUnfolderBase]: For 550372/550372 co-relation queries the response was YES. [2024-06-04 16:09:12,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37780 conditions, 4955 events. 2898/4955 cut-off events. For 550372/550372 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 32916 event pairs, 617 based on Foata normal form. 1/4954 useless extension candidates. Maximal degree in co-relation 37627. Up to 3871 conditions per place. [2024-06-04 16:09:12,591 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 203 selfloop transitions, 232 changer transitions 0/442 dead transitions. [2024-06-04 16:09:12,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 442 transitions, 8555 flow [2024-06-04 16:09:12,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 16:09:12,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 16:09:12,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 294 transitions. [2024-06-04 16:09:12,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2024-06-04 16:09:12,594 INFO L175 Difference]: Start difference. First operand has 332 places, 397 transitions, 6813 flow. Second operand 13 states and 294 transitions. [2024-06-04 16:09:12,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 442 transitions, 8555 flow [2024-06-04 16:09:14,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 442 transitions, 8159 flow, removed 57 selfloop flow, removed 5 redundant places. [2024-06-04 16:09:14,648 INFO L231 Difference]: Finished difference. Result has 340 places, 407 transitions, 7123 flow [2024-06-04 16:09:14,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6449, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7123, PETRI_PLACES=340, PETRI_TRANSITIONS=407} [2024-06-04 16:09:14,648 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 297 predicate places. [2024-06-04 16:09:14,648 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 407 transitions, 7123 flow [2024-06-04 16:09:14,648 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 16:09:14,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:09:14,648 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 16:09:14,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-04 16:09:14,649 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 16:09:14,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:09:14,649 INFO L85 PathProgramCache]: Analyzing trace with hash -547906796, now seen corresponding path program 2 times [2024-06-04 16:09:14,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:09:14,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638034910] [2024-06-04 16:09:14,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:09:14,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:09:14,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:09:14,837 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 16:09:14,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:09:14,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638034910] [2024-06-04 16:09:14,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638034910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:09:14,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:09:14,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:09:14,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390359658] [2024-06-04 16:09:14,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:09:14,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:09:14,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:09:14,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:09:14,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:09:14,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:09:14,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 407 transitions, 7123 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:14,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:09:14,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:09:14,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:09:15,696 INFO L124 PetriNetUnfolderBase]: 2903/4938 cut-off events. [2024-06-04 16:09:15,697 INFO L125 PetriNetUnfolderBase]: For 564680/564680 co-relation queries the response was YES. [2024-06-04 16:09:15,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37886 conditions, 4938 events. 2903/4938 cut-off events. For 564680/564680 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 32744 event pairs, 669 based on Foata normal form. 1/4930 useless extension candidates. Maximal degree in co-relation 37732. Up to 3875 conditions per place. [2024-06-04 16:09:15,762 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 222 selfloop transitions, 203 changer transitions 0/432 dead transitions. [2024-06-04 16:09:15,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 432 transitions, 8472 flow [2024-06-04 16:09:15,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:09:15,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:09:15,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 224 transitions. [2024-06-04 16:09:15,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-04 16:09:15,764 INFO L175 Difference]: Start difference. First operand has 340 places, 407 transitions, 7123 flow. Second operand 10 states and 224 transitions. [2024-06-04 16:09:15,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 432 transitions, 8472 flow [2024-06-04 16:09:17,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 432 transitions, 7792 flow, removed 34 selfloop flow, removed 11 redundant places. [2024-06-04 16:09:17,792 INFO L231 Difference]: Finished difference. Result has 339 places, 410 transitions, 6931 flow [2024-06-04 16:09:17,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6447, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6931, PETRI_PLACES=339, PETRI_TRANSITIONS=410} [2024-06-04 16:09:17,792 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 296 predicate places. [2024-06-04 16:09:17,792 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 410 transitions, 6931 flow [2024-06-04 16:09:17,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:17,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:09:17,792 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 16:09:17,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-04 16:09:17,792 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 16:09:17,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:09:17,793 INFO L85 PathProgramCache]: Analyzing trace with hash -306532820, now seen corresponding path program 6 times [2024-06-04 16:09:17,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:09:17,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683375203] [2024-06-04 16:09:17,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:09:17,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:09:17,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:09:17,995 INFO 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 16:09:17,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:09:17,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683375203] [2024-06-04 16:09:17,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683375203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:09:17,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:09:17,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:09:17,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321757768] [2024-06-04 16:09:17,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:09:17,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:09:17,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:09:17,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:09:17,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:09:18,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:09:18,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 410 transitions, 6931 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 16:09:18,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:09:18,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:09:18,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:09:19,013 INFO L124 PetriNetUnfolderBase]: 2908/4977 cut-off events. [2024-06-04 16:09:19,013 INFO L125 PetriNetUnfolderBase]: For 572745/572745 co-relation queries the response was YES. [2024-06-04 16:09:19,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37877 conditions, 4977 events. 2908/4977 cut-off events. For 572745/572745 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 33090 event pairs, 625 based on Foata normal form. 1/4976 useless extension candidates. Maximal degree in co-relation 37722. Up to 4244 conditions per place. [2024-06-04 16:09:19,072 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 310 selfloop transitions, 126 changer transitions 0/443 dead transitions. [2024-06-04 16:09:19,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 443 transitions, 8159 flow [2024-06-04 16:09:19,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:09:19,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:09:19,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 244 transitions. [2024-06-04 16:09:19,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5281385281385281 [2024-06-04 16:09:19,073 INFO L175 Difference]: Start difference. First operand has 339 places, 410 transitions, 6931 flow. Second operand 11 states and 244 transitions. [2024-06-04 16:09:19,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 443 transitions, 8159 flow [2024-06-04 16:09:21,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 443 transitions, 7708 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-04 16:09:21,573 INFO L231 Difference]: Finished difference. Result has 344 places, 415 transitions, 6915 flow [2024-06-04 16:09:21,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6488, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6915, PETRI_PLACES=344, PETRI_TRANSITIONS=415} [2024-06-04 16:09:21,573 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 301 predicate places. [2024-06-04 16:09:21,574 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 415 transitions, 6915 flow [2024-06-04 16:09:21,574 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 16:09:21,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:09:21,574 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 16:09:21,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-04 16:09:21,574 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 16:09:21,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:09:21,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1085922738, now seen corresponding path program 7 times [2024-06-04 16:09:21,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:09:21,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809030021] [2024-06-04 16:09:21,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:09:21,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:09:21,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:09:21,768 INFO 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 16:09:21,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:09:21,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809030021] [2024-06-04 16:09:21,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809030021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:09:21,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:09:21,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:09:21,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866236122] [2024-06-04 16:09:21,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:09:21,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:09:21,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:09:21,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:09:21,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:09:21,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:09:21,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 415 transitions, 6915 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 16:09:21,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:09:21,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:09:21,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:09:22,711 INFO L124 PetriNetUnfolderBase]: 2905/4965 cut-off events. [2024-06-04 16:09:22,712 INFO L125 PetriNetUnfolderBase]: For 576652/576652 co-relation queries the response was YES. [2024-06-04 16:09:22,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37645 conditions, 4965 events. 2905/4965 cut-off events. For 576652/576652 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 32986 event pairs, 615 based on Foata normal form. 1/4964 useless extension candidates. Maximal degree in co-relation 37488. Up to 3877 conditions per place. [2024-06-04 16:09:22,779 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 198 selfloop transitions, 236 changer transitions 0/441 dead transitions. [2024-06-04 16:09:22,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 441 transitions, 8225 flow [2024-06-04 16:09:22,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:09:22,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:09:22,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 250 transitions. [2024-06-04 16:09:22,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5411255411255411 [2024-06-04 16:09:22,780 INFO L175 Difference]: Start difference. First operand has 344 places, 415 transitions, 6915 flow. Second operand 11 states and 250 transitions. [2024-06-04 16:09:22,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 441 transitions, 8225 flow [2024-06-04 16:09:25,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 441 transitions, 8046 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-04 16:09:25,254 INFO L231 Difference]: Finished difference. Result has 349 places, 415 transitions, 7214 flow [2024-06-04 16:09:25,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6736, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7214, PETRI_PLACES=349, PETRI_TRANSITIONS=415} [2024-06-04 16:09:25,254 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 306 predicate places. [2024-06-04 16:09:25,255 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 415 transitions, 7214 flow [2024-06-04 16:09:25,255 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 16:09:25,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:09:25,255 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 16:09:25,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-04 16:09:25,255 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 16:09:25,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:09:25,255 INFO L85 PathProgramCache]: Analyzing trace with hash -249437366, now seen corresponding path program 8 times [2024-06-04 16:09:25,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:09:25,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994933328] [2024-06-04 16:09:25,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:09:25,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:09:25,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:09:25,451 INFO 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 16:09:25,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:09:25,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994933328] [2024-06-04 16:09:25,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994933328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:09:25,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:09:25,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:09:25,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696538985] [2024-06-04 16:09:25,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:09:25,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:09:25,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:09:25,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:09:25,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:09:25,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:09:25,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 415 transitions, 7214 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 16:09:25,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:09:25,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:09:25,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:09:26,384 INFO L124 PetriNetUnfolderBase]: 2910/4974 cut-off events. [2024-06-04 16:09:26,384 INFO L125 PetriNetUnfolderBase]: For 590940/590940 co-relation queries the response was YES. [2024-06-04 16:09:26,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38217 conditions, 4974 events. 2910/4974 cut-off events. For 590940/590940 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 33056 event pairs, 615 based on Foata normal form. 1/4973 useless extension candidates. Maximal degree in co-relation 38059. Up to 3881 conditions per place. [2024-06-04 16:09:26,457 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 198 selfloop transitions, 239 changer transitions 0/444 dead transitions. [2024-06-04 16:09:26,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 444 transitions, 8597 flow [2024-06-04 16:09:26,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:09:26,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:09:26,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 251 transitions. [2024-06-04 16:09:26,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5432900432900433 [2024-06-04 16:09:26,459 INFO L175 Difference]: Start difference. First operand has 349 places, 415 transitions, 7214 flow. Second operand 11 states and 251 transitions. [2024-06-04 16:09:26,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 444 transitions, 8597 flow [2024-06-04 16:09:29,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 444 transitions, 8263 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-04 16:09:29,094 INFO L231 Difference]: Finished difference. Result has 353 places, 418 transitions, 7427 flow [2024-06-04 16:09:29,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6883, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7427, PETRI_PLACES=353, PETRI_TRANSITIONS=418} [2024-06-04 16:09:29,095 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 310 predicate places. [2024-06-04 16:09:29,095 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 418 transitions, 7427 flow [2024-06-04 16:09:29,095 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 16:09:29,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:09:29,095 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] [2024-06-04 16:09:29,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-04 16:09:29,096 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 16:09:29,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:09:29,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1674954370, now seen corresponding path program 3 times [2024-06-04 16:09:29,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:09:29,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816192808] [2024-06-04 16:09:29,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:09:29,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:09:29,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:09:29,273 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 16:09:29,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:09:29,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816192808] [2024-06-04 16:09:29,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816192808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:09:29,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:09:29,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:09:29,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927073217] [2024-06-04 16:09:29,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:09:29,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:09:29,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:09:29,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:09:29,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:09:29,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:09:29,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 418 transitions, 7427 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:29,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:09:29,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:09:29,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:09:30,207 INFO L124 PetriNetUnfolderBase]: 2915/4957 cut-off events. [2024-06-04 16:09:30,207 INFO L125 PetriNetUnfolderBase]: For 606315/606315 co-relation queries the response was YES. [2024-06-04 16:09:30,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38455 conditions, 4957 events. 2915/4957 cut-off events. For 606315/606315 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 32951 event pairs, 663 based on Foata normal form. 1/4949 useless extension candidates. Maximal degree in co-relation 38296. Up to 3885 conditions per place. [2024-06-04 16:09:30,270 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 222 selfloop transitions, 211 changer transitions 0/440 dead transitions. [2024-06-04 16:09:30,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 440 transitions, 8991 flow [2024-06-04 16:09:30,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:09:30,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:09:30,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-04 16:09:30,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5502645502645502 [2024-06-04 16:09:30,272 INFO L175 Difference]: Start difference. First operand has 353 places, 418 transitions, 7427 flow. Second operand 9 states and 208 transitions. [2024-06-04 16:09:30,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 440 transitions, 8991 flow [2024-06-04 16:09:32,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 440 transitions, 8455 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-04 16:09:32,796 INFO L231 Difference]: Finished difference. Result has 352 places, 421 transitions, 7391 flow [2024-06-04 16:09:32,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6895, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7391, PETRI_PLACES=352, PETRI_TRANSITIONS=421} [2024-06-04 16:09:32,797 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 309 predicate places. [2024-06-04 16:09:32,797 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 421 transitions, 7391 flow [2024-06-04 16:09:32,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:32,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:09:32,797 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 16:09:32,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-04 16:09:32,797 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 16:09:32,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:09:32,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1660494774, now seen corresponding path program 4 times [2024-06-04 16:09:32,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:09:32,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939233481] [2024-06-04 16:09:32,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:09:32,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:09:32,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:09:32,977 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 16:09:32,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:09:32,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939233481] [2024-06-04 16:09:32,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939233481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:09:32,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:09:32,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:09:32,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433817103] [2024-06-04 16:09:32,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:09:32,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:09:32,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:09:32,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:09:32,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:09:33,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:09:33,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 421 transitions, 7391 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:33,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:09:33,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:09:33,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:09:33,837 INFO L124 PetriNetUnfolderBase]: 2912/4969 cut-off events. [2024-06-04 16:09:33,838 INFO L125 PetriNetUnfolderBase]: For 612210/612210 co-relation queries the response was YES. [2024-06-04 16:09:33,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38360 conditions, 4969 events. 2912/4969 cut-off events. For 612210/612210 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 33110 event pairs, 679 based on Foata normal form. 1/4961 useless extension candidates. Maximal degree in co-relation 38200. Up to 3883 conditions per place. [2024-06-04 16:09:33,902 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 226 selfloop transitions, 206 changer transitions 0/439 dead transitions. [2024-06-04 16:09:33,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 439 transitions, 8689 flow [2024-06-04 16:09:33,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:09:33,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:09:33,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-04 16:09:33,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.544973544973545 [2024-06-04 16:09:33,903 INFO L175 Difference]: Start difference. First operand has 352 places, 421 transitions, 7391 flow. Second operand 9 states and 206 transitions. [2024-06-04 16:09:33,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 439 transitions, 8689 flow [2024-06-04 16:09:36,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 439 transitions, 8171 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-04 16:09:36,507 INFO L231 Difference]: Finished difference. Result has 354 places, 421 transitions, 7293 flow [2024-06-04 16:09:36,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6873, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7293, PETRI_PLACES=354, PETRI_TRANSITIONS=421} [2024-06-04 16:09:36,507 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 311 predicate places. [2024-06-04 16:09:36,508 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 421 transitions, 7293 flow [2024-06-04 16:09:36,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:36,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:09:36,508 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 16:09:36,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-04 16:09:36,508 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 16:09:36,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:09:36,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1380517264, now seen corresponding path program 5 times [2024-06-04 16:09:36,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:09:36,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645445282] [2024-06-04 16:09:36,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:09:36,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:09:36,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:09:36,703 INFO 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 16:09:36,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:09:36,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645445282] [2024-06-04 16:09:36,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645445282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:09:36,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:09:36,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:09:36,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381326550] [2024-06-04 16:09:36,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:09:36,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:09:36,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:09:36,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:09:36,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:09:36,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:09:36,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 421 transitions, 7293 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:36,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:09:36,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:09:36,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:09:37,624 INFO L124 PetriNetUnfolderBase]: 2917/4986 cut-off events. [2024-06-04 16:09:37,624 INFO L125 PetriNetUnfolderBase]: For 623196/623196 co-relation queries the response was YES. [2024-06-04 16:09:37,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38479 conditions, 4986 events. 2917/4986 cut-off events. For 623196/623196 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 33258 event pairs, 638 based on Foata normal form. 1/4984 useless extension candidates. Maximal degree in co-relation 38318. Up to 4141 conditions per place. [2024-06-04 16:09:37,690 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 311 selfloop transitions, 125 changer transitions 0/443 dead transitions. [2024-06-04 16:09:37,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 443 transitions, 8734 flow [2024-06-04 16:09:37,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:09:37,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:09:37,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-04 16:09:37,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5505952380952381 [2024-06-04 16:09:37,691 INFO L175 Difference]: Start difference. First operand has 354 places, 421 transitions, 7293 flow. Second operand 8 states and 185 transitions. [2024-06-04 16:09:37,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 443 transitions, 8734 flow [2024-06-04 16:09:40,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 443 transitions, 8293 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-04 16:09:40,381 INFO L231 Difference]: Finished difference. Result has 355 places, 426 transitions, 7345 flow [2024-06-04 16:09:40,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6858, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7345, PETRI_PLACES=355, PETRI_TRANSITIONS=426} [2024-06-04 16:09:40,381 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 312 predicate places. [2024-06-04 16:09:40,381 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 426 transitions, 7345 flow [2024-06-04 16:09:40,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:40,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:09:40,382 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 16:09:40,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-04 16:09:40,382 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 16:09:40,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:09:40,382 INFO L85 PathProgramCache]: Analyzing trace with hash -838497476, now seen corresponding path program 9 times [2024-06-04 16:09:40,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:09:40,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294402581] [2024-06-04 16:09:40,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:09:40,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:09:40,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:09:40,597 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 16:09:40,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:09:40,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294402581] [2024-06-04 16:09:40,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294402581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:09:40,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:09:40,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:09:40,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877296224] [2024-06-04 16:09:40,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:09:40,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:09:40,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:09:40,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:09:40,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:09:40,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:09:40,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 426 transitions, 7345 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 16:09:40,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:09:40,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:09:40,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:09:41,666 INFO L124 PetriNetUnfolderBase]: 2908/4979 cut-off events. [2024-06-04 16:09:41,666 INFO L125 PetriNetUnfolderBase]: For 627166/627166 co-relation queries the response was YES. [2024-06-04 16:09:41,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38230 conditions, 4979 events. 2908/4979 cut-off events. For 627166/627166 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 33186 event pairs, 614 based on Foata normal form. 3/4980 useless extension candidates. Maximal degree in co-relation 38067. Up to 4347 conditions per place. [2024-06-04 16:09:41,736 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 375 selfloop transitions, 75 changer transitions 0/457 dead transitions. [2024-06-04 16:09:41,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 457 transitions, 8523 flow [2024-06-04 16:09:41,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:09:41,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:09:41,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-04 16:09:41,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5982142857142857 [2024-06-04 16:09:41,737 INFO L175 Difference]: Start difference. First operand has 355 places, 426 transitions, 7345 flow. Second operand 8 states and 201 transitions. [2024-06-04 16:09:41,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 457 transitions, 8523 flow [2024-06-04 16:09:44,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 457 transitions, 8318 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-04 16:09:44,476 INFO L231 Difference]: Finished difference. Result has 358 places, 426 transitions, 7305 flow [2024-06-04 16:09:44,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7140, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7305, PETRI_PLACES=358, PETRI_TRANSITIONS=426} [2024-06-04 16:09:44,476 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 315 predicate places. [2024-06-04 16:09:44,476 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 426 transitions, 7305 flow [2024-06-04 16:09:44,477 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 16:09:44,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:09:44,477 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 16:09:44,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-04 16:09:44,477 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 16:09:44,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:09:44,477 INFO L85 PathProgramCache]: Analyzing trace with hash -2073156896, now seen corresponding path program 6 times [2024-06-04 16:09:44,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:09:44,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172858671] [2024-06-04 16:09:44,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:09:44,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:09:44,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:09:44,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:09:44,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:09:44,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172858671] [2024-06-04 16:09:44,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172858671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:09:44,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:09:44,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:09:44,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785201783] [2024-06-04 16:09:44,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:09:44,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:09:44,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:09:44,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:09:44,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:09:44,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:09:44,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 426 transitions, 7305 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:44,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:09:44,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:09:44,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:09:45,566 INFO L124 PetriNetUnfolderBase]: 2913/4975 cut-off events. [2024-06-04 16:09:45,566 INFO L125 PetriNetUnfolderBase]: For 630551/630551 co-relation queries the response was YES. [2024-06-04 16:09:45,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38257 conditions, 4975 events. 2913/4975 cut-off events. For 630551/630551 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 33118 event pairs, 632 based on Foata normal form. 1/4973 useless extension candidates. Maximal degree in co-relation 38094. Up to 4138 conditions per place. [2024-06-04 16:09:45,634 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 318 selfloop transitions, 126 changer transitions 0/451 dead transitions. [2024-06-04 16:09:45,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 451 transitions, 8722 flow [2024-06-04 16:09:45,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:09:45,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:09:45,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-04 16:09:45,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5918367346938775 [2024-06-04 16:09:45,635 INFO L175 Difference]: Start difference. First operand has 358 places, 426 transitions, 7305 flow. Second operand 7 states and 174 transitions. [2024-06-04 16:09:45,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 451 transitions, 8722 flow [2024-06-04 16:09:48,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 451 transitions, 8562 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-04 16:09:48,708 INFO L231 Difference]: Finished difference. Result has 358 places, 429 transitions, 7480 flow [2024-06-04 16:09:48,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7149, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7480, PETRI_PLACES=358, PETRI_TRANSITIONS=429} [2024-06-04 16:09:48,709 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 315 predicate places. [2024-06-04 16:09:48,709 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 429 transitions, 7480 flow [2024-06-04 16:09:48,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:48,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:09:48,709 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 16:09:48,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-04 16:09:48,710 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 16:09:48,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:09:48,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1738893352, now seen corresponding path program 10 times [2024-06-04 16:09:48,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:09:48,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398309102] [2024-06-04 16:09:48,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:09:48,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:09:48,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:09:48,929 INFO 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 16:09:48,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:09:48,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398309102] [2024-06-04 16:09:48,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398309102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:09:48,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:09:48,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:09:48,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406551670] [2024-06-04 16:09:48,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:09:48,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:09:48,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:09:48,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:09:48,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:09:48,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:09:48,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 429 transitions, 7480 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 16:09:48,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:09:48,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:09:48,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:09:49,855 INFO L124 PetriNetUnfolderBase]: 2904/4972 cut-off events. [2024-06-04 16:09:49,856 INFO L125 PetriNetUnfolderBase]: For 625815/625815 co-relation queries the response was YES. [2024-06-04 16:09:49,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38031 conditions, 4972 events. 2904/4972 cut-off events. For 625815/625815 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 33146 event pairs, 612 based on Foata normal form. 3/4973 useless extension candidates. Maximal degree in co-relation 37868. Up to 4345 conditions per place. [2024-06-04 16:09:49,921 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 373 selfloop transitions, 75 changer transitions 0/455 dead transitions. [2024-06-04 16:09:49,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 455 transitions, 8442 flow [2024-06-04 16:09:49,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:09:49,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:09:49,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-04 16:09:49,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6020408163265306 [2024-06-04 16:09:49,922 INFO L175 Difference]: Start difference. First operand has 358 places, 429 transitions, 7480 flow. Second operand 7 states and 177 transitions. [2024-06-04 16:09:49,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 455 transitions, 8442 flow [2024-06-04 16:09:53,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 455 transitions, 8152 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-04 16:09:53,172 INFO L231 Difference]: Finished difference. Result has 361 places, 429 transitions, 7355 flow [2024-06-04 16:09:53,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7190, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7355, PETRI_PLACES=361, PETRI_TRANSITIONS=429} [2024-06-04 16:09:53,172 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 318 predicate places. [2024-06-04 16:09:53,172 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 429 transitions, 7355 flow [2024-06-04 16:09:53,172 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 16:09:53,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:09:53,173 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] [2024-06-04 16:09:53,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-04 16:09:53,173 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 16:09:53,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:09:53,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1044337016, now seen corresponding path program 7 times [2024-06-04 16:09:53,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:09:53,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468474155] [2024-06-04 16:09:53,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:09:53,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:09:53,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:09:53,362 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 16:09:53,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:09:53,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468474155] [2024-06-04 16:09:53,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468474155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:09:53,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:09:53,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:09:53,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252061627] [2024-06-04 16:09:53,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:09:53,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:09:53,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:09:53,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:09:53,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:09:53,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:09:53,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 429 transitions, 7355 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:53,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:09:53,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:09:53,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:09:54,243 INFO L124 PetriNetUnfolderBase]: 2901/4959 cut-off events. [2024-06-04 16:09:54,243 INFO L125 PetriNetUnfolderBase]: For 620292/620292 co-relation queries the response was YES. [2024-06-04 16:09:54,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37790 conditions, 4959 events. 2901/4959 cut-off events. For 620292/620292 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 33042 event pairs, 632 based on Foata normal form. 1/4957 useless extension candidates. Maximal degree in co-relation 37626. Up to 4129 conditions per place. [2024-06-04 16:09:54,320 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 315 selfloop transitions, 125 changer transitions 0/447 dead transitions. [2024-06-04 16:09:54,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 447 transitions, 8483 flow [2024-06-04 16:09:54,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:09:54,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:09:54,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-04 16:09:54,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2024-06-04 16:09:54,321 INFO L175 Difference]: Start difference. First operand has 361 places, 429 transitions, 7355 flow. Second operand 7 states and 170 transitions. [2024-06-04 16:09:54,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 447 transitions, 8483 flow [2024-06-04 16:09:57,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 447 transitions, 8268 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-04 16:09:57,672 INFO L231 Difference]: Finished difference. Result has 362 places, 429 transitions, 7396 flow [2024-06-04 16:09:57,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7140, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7396, PETRI_PLACES=362, PETRI_TRANSITIONS=429} [2024-06-04 16:09:57,673 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 319 predicate places. [2024-06-04 16:09:57,673 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 429 transitions, 7396 flow [2024-06-04 16:09:57,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:57,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:09:57,673 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 16:09:57,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-04 16:09:57,674 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 16:09:57,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:09:57,674 INFO L85 PathProgramCache]: Analyzing trace with hash 377893220, now seen corresponding path program 1 times [2024-06-04 16:09:57,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:09:57,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874362788] [2024-06-04 16:09:57,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:09:57,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:09:57,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:09:57,882 INFO 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 16:09:57,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:09:57,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874362788] [2024-06-04 16:09:57,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874362788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:09:57,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:09:57,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:09:57,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553962774] [2024-06-04 16:09:57,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:09:57,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:09:57,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:09:57,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:09:57,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:09:57,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:09:57,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 429 transitions, 7396 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 16:09:57,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:09:57,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:09:57,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:09:58,788 INFO L124 PetriNetUnfolderBase]: 2888/4944 cut-off events. [2024-06-04 16:09:58,788 INFO L125 PetriNetUnfolderBase]: For 627550/627550 co-relation queries the response was YES. [2024-06-04 16:09:58,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37326 conditions, 4944 events. 2888/4944 cut-off events. For 627550/627550 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 32967 event pairs, 495 based on Foata normal form. 6/4947 useless extension candidates. Maximal degree in co-relation 37161. Up to 4245 conditions per place. [2024-06-04 16:09:58,854 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 417 selfloop transitions, 24 changer transitions 1/449 dead transitions. [2024-06-04 16:09:58,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 449 transitions, 8374 flow [2024-06-04 16:09:58,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:09:58,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:09:58,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-04 16:09:58,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-04 16:09:58,855 INFO L175 Difference]: Start difference. First operand has 362 places, 429 transitions, 7396 flow. Second operand 5 states and 126 transitions. [2024-06-04 16:09:58,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 449 transitions, 8374 flow [2024-06-04 16:10:02,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 449 transitions, 7923 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-04 16:10:02,123 INFO L231 Difference]: Finished difference. Result has 357 places, 429 transitions, 6998 flow [2024-06-04 16:10:02,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6945, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6998, PETRI_PLACES=357, PETRI_TRANSITIONS=429} [2024-06-04 16:10:02,123 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 314 predicate places. [2024-06-04 16:10:02,124 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 429 transitions, 6998 flow [2024-06-04 16:10:02,124 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 16:10:02,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:10:02,124 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 16:10:02,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-04 16:10:02,124 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 16:10:02,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:10:02,124 INFO L85 PathProgramCache]: Analyzing trace with hash -99724504, now seen corresponding path program 1 times [2024-06-04 16:10:02,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:10:02,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658944233] [2024-06-04 16:10:02,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:10:02,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:10:02,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:10:02,338 INFO 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 16:10:02,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:10:02,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658944233] [2024-06-04 16:10:02,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658944233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:10:02,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:10:02,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:10:02,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190679074] [2024-06-04 16:10:02,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:10:02,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:10:02,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:10:02,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:10:02,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:10:02,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:10:02,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 429 transitions, 6998 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 16:10:02,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:10:02,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:10:02,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:10:03,318 INFO L124 PetriNetUnfolderBase]: 2935/5003 cut-off events. [2024-06-04 16:10:03,318 INFO L125 PetriNetUnfolderBase]: For 647124/647124 co-relation queries the response was YES. [2024-06-04 16:10:03,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38246 conditions, 5003 events. 2935/5003 cut-off events. For 647124/647124 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 33297 event pairs, 597 based on Foata normal form. 2/4992 useless extension candidates. Maximal degree in co-relation 38081. Up to 4402 conditions per place. [2024-06-04 16:10:03,388 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 397 selfloop transitions, 61 changer transitions 0/465 dead transitions. [2024-06-04 16:10:03,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 465 transitions, 8372 flow [2024-06-04 16:10:03,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:10:03,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:10:03,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 205 transitions. [2024-06-04 16:10:03,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5423280423280423 [2024-06-04 16:10:03,389 INFO L175 Difference]: Start difference. First operand has 357 places, 429 transitions, 6998 flow. Second operand 9 states and 205 transitions. [2024-06-04 16:10:03,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 465 transitions, 8372 flow [2024-06-04 16:10:06,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 465 transitions, 8309 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-04 16:10:06,727 INFO L231 Difference]: Finished difference. Result has 363 places, 437 transitions, 7274 flow [2024-06-04 16:10:06,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6935, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7274, PETRI_PLACES=363, PETRI_TRANSITIONS=437} [2024-06-04 16:10:06,728 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 320 predicate places. [2024-06-04 16:10:06,728 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 437 transitions, 7274 flow [2024-06-04 16:10:06,728 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 16:10:06,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:10:06,728 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 16:10:06,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-04 16:10:06,729 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 16:10:06,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:10:06,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1679593830, now seen corresponding path program 2 times [2024-06-04 16:10:06,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:10:06,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389008823] [2024-06-04 16:10:06,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:10:06,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:10:06,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:10:06,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:10:06,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:10:06,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389008823] [2024-06-04 16:10:06,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389008823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:10:06,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:10:06,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:10:06,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77262612] [2024-06-04 16:10:06,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:10:06,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:10:06,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:10:06,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:10:06,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:10:06,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:10:06,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 437 transitions, 7274 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 16:10:06,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:10:06,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:10:06,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:10:08,002 INFO L124 PetriNetUnfolderBase]: 2930/5010 cut-off events. [2024-06-04 16:10:08,003 INFO L125 PetriNetUnfolderBase]: For 649039/649039 co-relation queries the response was YES. [2024-06-04 16:10:08,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38301 conditions, 5010 events. 2930/5010 cut-off events. For 649039/649039 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 33407 event pairs, 612 based on Foata normal form. 2/5008 useless extension candidates. Maximal degree in co-relation 38134. Up to 4281 conditions per place. [2024-06-04 16:10:08,071 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 322 selfloop transitions, 132 changer transitions 0/461 dead transitions. [2024-06-04 16:10:08,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 461 transitions, 8240 flow [2024-06-04 16:10:08,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:10:08,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:10:08,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 224 transitions. [2024-06-04 16:10:08,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-04 16:10:08,072 INFO L175 Difference]: Start difference. First operand has 363 places, 437 transitions, 7274 flow. Second operand 10 states and 224 transitions. [2024-06-04 16:10:08,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 461 transitions, 8240 flow [2024-06-04 16:10:10,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 461 transitions, 8077 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-04 16:10:10,866 INFO L231 Difference]: Finished difference. Result has 367 places, 437 transitions, 7380 flow [2024-06-04 16:10:10,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7111, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7380, PETRI_PLACES=367, PETRI_TRANSITIONS=437} [2024-06-04 16:10:10,866 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 324 predicate places. [2024-06-04 16:10:10,866 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 437 transitions, 7380 flow [2024-06-04 16:10:10,867 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 16:10:10,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:10:10,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:10:10,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-04 16:10:10,867 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 16:10:10,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:10:10,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1409096950, now seen corresponding path program 3 times [2024-06-04 16:10:10,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:10:10,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365083055] [2024-06-04 16:10:10,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:10:10,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:10:10,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:10:11,115 INFO 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 16:10:11,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:10:11,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365083055] [2024-06-04 16:10:11,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365083055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:10:11,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:10:11,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:10:11,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193312503] [2024-06-04 16:10:11,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:10:11,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:10:11,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:10:11,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:10:11,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:10:11,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:10:11,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 437 transitions, 7380 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 16:10:11,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:10:11,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:10:11,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:10:12,076 INFO L124 PetriNetUnfolderBase]: 2938/5030 cut-off events. [2024-06-04 16:10:12,077 INFO L125 PetriNetUnfolderBase]: For 661671/661671 co-relation queries the response was YES. [2024-06-04 16:10:12,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38595 conditions, 5030 events. 2938/5030 cut-off events. For 661671/661671 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 33550 event pairs, 620 based on Foata normal form. 2/5028 useless extension candidates. Maximal degree in co-relation 38427. Up to 4293 conditions per place. [2024-06-04 16:10:12,147 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 326 selfloop transitions, 131 changer transitions 0/464 dead transitions. [2024-06-04 16:10:12,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 464 transitions, 8397 flow [2024-06-04 16:10:12,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:10:12,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:10:12,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 242 transitions. [2024-06-04 16:10:12,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-04 16:10:12,148 INFO L175 Difference]: Start difference. First operand has 367 places, 437 transitions, 7380 flow. Second operand 11 states and 242 transitions. [2024-06-04 16:10:12,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 464 transitions, 8397 flow [2024-06-04 16:10:14,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 464 transitions, 8213 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-04 16:10:14,858 INFO L231 Difference]: Finished difference. Result has 373 places, 439 transitions, 7510 flow [2024-06-04 16:10:14,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7196, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7510, PETRI_PLACES=373, PETRI_TRANSITIONS=439} [2024-06-04 16:10:14,859 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 330 predicate places. [2024-06-04 16:10:14,859 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 439 transitions, 7510 flow [2024-06-04 16:10:14,859 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 16:10:14,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:10:14,859 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] [2024-06-04 16:10:14,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-04 16:10:14,859 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 16:10:14,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:10:14,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1633958764, now seen corresponding path program 4 times [2024-06-04 16:10:14,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:10:14,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500002281] [2024-06-04 16:10:14,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:10:14,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:10:14,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:10:15,074 INFO 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 16:10:15,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:10:15,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500002281] [2024-06-04 16:10:15,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500002281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:10:15,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:10:15,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:10:15,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351893293] [2024-06-04 16:10:15,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:10:15,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:10:15,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:10:15,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:10:15,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:10:15,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:10:15,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 439 transitions, 7510 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 16:10:15,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:10:15,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:10:15,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:10:16,096 INFO L124 PetriNetUnfolderBase]: 2986/5104 cut-off events. [2024-06-04 16:10:16,096 INFO L125 PetriNetUnfolderBase]: For 720884/720884 co-relation queries the response was YES. [2024-06-04 16:10:16,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39063 conditions, 5104 events. 2986/5104 cut-off events. For 720884/720884 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 34122 event pairs, 611 based on Foata normal form. 12/5112 useless extension candidates. Maximal degree in co-relation 38894. Up to 4372 conditions per place. [2024-06-04 16:10:16,281 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 413 selfloop transitions, 55 changer transitions 0/475 dead transitions. [2024-06-04 16:10:16,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 475 transitions, 8632 flow [2024-06-04 16:10:16,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:10:16,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:10:16,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-04 16:10:16,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6156462585034014 [2024-06-04 16:10:16,282 INFO L175 Difference]: Start difference. First operand has 373 places, 439 transitions, 7510 flow. Second operand 7 states and 181 transitions. [2024-06-04 16:10:16,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 475 transitions, 8632 flow [2024-06-04 16:10:19,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 475 transitions, 8356 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-04 16:10:19,903 INFO L231 Difference]: Finished difference. Result has 372 places, 443 transitions, 7447 flow [2024-06-04 16:10:19,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7234, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7447, PETRI_PLACES=372, PETRI_TRANSITIONS=443} [2024-06-04 16:10:19,903 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 329 predicate places. [2024-06-04 16:10:19,904 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 443 transitions, 7447 flow [2024-06-04 16:10:19,904 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 16:10:19,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:10:19,904 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 16:10:19,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-04 16:10:19,904 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 16:10:19,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:10:19,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1902830616, now seen corresponding path program 11 times [2024-06-04 16:10:19,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:10:19,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753739766] [2024-06-04 16:10:19,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:10:19,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:10:19,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:10:20,085 INFO 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 16:10:20,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:10:20,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753739766] [2024-06-04 16:10:20,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753739766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:10:20,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:10:20,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:10:20,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461362817] [2024-06-04 16:10:20,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:10:20,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:10:20,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:10:20,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:10:20,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:10:20,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:10:20,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 443 transitions, 7447 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:10:20,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:10:20,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:10:20,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:10:21,053 INFO L124 PetriNetUnfolderBase]: 2991/5112 cut-off events. [2024-06-04 16:10:21,054 INFO L125 PetriNetUnfolderBase]: For 669379/669383 co-relation queries the response was YES. [2024-06-04 16:10:21,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39162 conditions, 5112 events. 2991/5112 cut-off events. For 669379/669383 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 34292 event pairs, 655 based on Foata normal form. 5/5114 useless extension candidates. Maximal degree in co-relation 38992. Up to 4010 conditions per place. [2024-06-04 16:10:21,125 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 245 selfloop transitions, 220 changer transitions 0/472 dead transitions. [2024-06-04 16:10:21,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 472 transitions, 8946 flow [2024-06-04 16:10:21,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:10:21,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:10:21,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 246 transitions. [2024-06-04 16:10:21,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5324675324675324 [2024-06-04 16:10:21,126 INFO L175 Difference]: Start difference. First operand has 372 places, 443 transitions, 7447 flow. Second operand 11 states and 246 transitions. [2024-06-04 16:10:21,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 472 transitions, 8946 flow [2024-06-04 16:10:23,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 472 transitions, 8809 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-04 16:10:23,967 INFO L231 Difference]: Finished difference. Result has 378 places, 446 transitions, 7831 flow [2024-06-04 16:10:23,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7310, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7831, PETRI_PLACES=378, PETRI_TRANSITIONS=446} [2024-06-04 16:10:23,968 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-04 16:10:23,968 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 446 transitions, 7831 flow [2024-06-04 16:10:23,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:10:23,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:10:23,968 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 16:10:23,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-04 16:10:23,968 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 16:10:23,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:10:23,968 INFO L85 PathProgramCache]: Analyzing trace with hash 977088872, now seen corresponding path program 12 times [2024-06-04 16:10:23,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:10:23,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661526351] [2024-06-04 16:10:23,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:10:23,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:10:23,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:10:24,155 INFO 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 16:10:24,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:10:24,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661526351] [2024-06-04 16:10:24,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661526351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:10:24,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:10:24,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:10:24,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972391218] [2024-06-04 16:10:24,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:10:24,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:10:24,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:10:24,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:10:24,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:10:24,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:10:24,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 446 transitions, 7831 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:10:24,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:10:24,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:10:24,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:10:25,160 INFO L124 PetriNetUnfolderBase]: 2988/5104 cut-off events. [2024-06-04 16:10:25,161 INFO L125 PetriNetUnfolderBase]: For 678415/678419 co-relation queries the response was YES. [2024-06-04 16:10:25,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39408 conditions, 5104 events. 2988/5104 cut-off events. For 678415/678419 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 34148 event pairs, 653 based on Foata normal form. 5/5106 useless extension candidates. Maximal degree in co-relation 39237. Up to 4008 conditions per place. [2024-06-04 16:10:25,236 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 245 selfloop transitions, 216 changer transitions 0/468 dead transitions. [2024-06-04 16:10:25,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 468 transitions, 9241 flow [2024-06-04 16:10:25,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:10:25,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:10:25,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 227 transitions. [2024-06-04 16:10:25,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5404761904761904 [2024-06-04 16:10:25,237 INFO L175 Difference]: Start difference. First operand has 378 places, 446 transitions, 7831 flow. Second operand 10 states and 227 transitions. [2024-06-04 16:10:25,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 468 transitions, 9241 flow [2024-06-04 16:10:28,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 468 transitions, 8893 flow, removed 73 selfloop flow, removed 5 redundant places. [2024-06-04 16:10:28,747 INFO L231 Difference]: Finished difference. Result has 383 places, 446 transitions, 7921 flow [2024-06-04 16:10:28,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7483, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7921, PETRI_PLACES=383, PETRI_TRANSITIONS=446} [2024-06-04 16:10:28,747 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 340 predicate places. [2024-06-04 16:10:28,747 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 446 transitions, 7921 flow [2024-06-04 16:10:28,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:10:28,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:10:28,748 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 16:10:28,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-04 16:10:28,748 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 16:10:28,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:10:28,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1593148366, now seen corresponding path program 13 times [2024-06-04 16:10:28,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:10:28,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247042136] [2024-06-04 16:10:28,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:10:28,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:10:28,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:10:28,945 INFO 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 16:10:28,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:10:28,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247042136] [2024-06-04 16:10:28,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247042136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:10:28,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:10:28,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:10:28,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38042862] [2024-06-04 16:10:28,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:10:28,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:10:28,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:10:28,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:10:28,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:10:29,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:10:29,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 446 transitions, 7921 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 16:10:29,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:10:29,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:10:29,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:10:30,005 INFO L124 PetriNetUnfolderBase]: 3001/5100 cut-off events. [2024-06-04 16:10:30,005 INFO L125 PetriNetUnfolderBase]: For 698494/698494 co-relation queries the response was YES. [2024-06-04 16:10:30,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39713 conditions, 5100 events. 3001/5100 cut-off events. For 698494/698494 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 34013 event pairs, 659 based on Foata normal form. 1/5093 useless extension candidates. Maximal degree in co-relation 39541. Up to 4416 conditions per place. [2024-06-04 16:10:30,076 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 370 selfloop transitions, 102 changer transitions 0/479 dead transitions. [2024-06-04 16:10:30,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 479 transitions, 9248 flow [2024-06-04 16:10:30,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:10:30,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:10:30,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 263 transitions. [2024-06-04 16:10:30,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5218253968253969 [2024-06-04 16:10:30,077 INFO L175 Difference]: Start difference. First operand has 383 places, 446 transitions, 7921 flow. Second operand 12 states and 263 transitions. [2024-06-04 16:10:30,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 479 transitions, 9248 flow [2024-06-04 16:10:33,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 479 transitions, 8813 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-04 16:10:33,282 INFO L231 Difference]: Finished difference. Result has 389 places, 450 transitions, 7807 flow [2024-06-04 16:10:33,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7492, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7807, PETRI_PLACES=389, PETRI_TRANSITIONS=450} [2024-06-04 16:10:33,283 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 346 predicate places. [2024-06-04 16:10:33,283 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 450 transitions, 7807 flow [2024-06-04 16:10:33,283 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 16:10:33,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:10:33,284 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 16:10:33,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-04 16:10:33,284 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 16:10:33,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:10:33,284 INFO L85 PathProgramCache]: Analyzing trace with hash 509100622, now seen corresponding path program 14 times [2024-06-04 16:10:33,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:10:33,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691194362] [2024-06-04 16:10:33,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:10:33,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:10:33,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:10:33,476 INFO 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 16:10:33,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:10:33,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691194362] [2024-06-04 16:10:33,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691194362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:10:33,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:10:33,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:10:33,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998194562] [2024-06-04 16:10:33,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:10:33,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:10:33,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:10:33,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:10:33,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:10:33,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:10:33,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 450 transitions, 7807 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 16:10:33,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:10:33,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:10:33,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:10:34,514 INFO L124 PetriNetUnfolderBase]: 3006/5114 cut-off events. [2024-06-04 16:10:34,514 INFO L125 PetriNetUnfolderBase]: For 707583/707583 co-relation queries the response was YES. [2024-06-04 16:10:34,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39617 conditions, 5114 events. 3006/5114 cut-off events. For 707583/707583 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 34195 event pairs, 669 based on Foata normal form. 1/5106 useless extension candidates. Maximal degree in co-relation 39443. Up to 4025 conditions per place. [2024-06-04 16:10:34,600 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 242 selfloop transitions, 230 changer transitions 0/479 dead transitions. [2024-06-04 16:10:34,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 479 transitions, 9120 flow [2024-06-04 16:10:34,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:10:34,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:10:34,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 263 transitions. [2024-06-04 16:10:34,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5218253968253969 [2024-06-04 16:10:34,601 INFO L175 Difference]: Start difference. First operand has 389 places, 450 transitions, 7807 flow. Second operand 12 states and 263 transitions. [2024-06-04 16:10:34,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 479 transitions, 9120 flow [2024-06-04 16:10:37,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 479 transitions, 8807 flow, removed 45 selfloop flow, removed 11 redundant places. [2024-06-04 16:10:37,530 INFO L231 Difference]: Finished difference. Result has 390 places, 453 transitions, 8047 flow [2024-06-04 16:10:37,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7521, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8047, PETRI_PLACES=390, PETRI_TRANSITIONS=453} [2024-06-04 16:10:37,530 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 347 predicate places. [2024-06-04 16:10:37,531 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 453 transitions, 8047 flow [2024-06-04 16:10:37,531 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 16:10:37,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:10:37,531 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 16:10:37,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-04 16:10:37,531 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 16:10:37,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:10:37,531 INFO L85 PathProgramCache]: Analyzing trace with hash -438438766, now seen corresponding path program 15 times [2024-06-04 16:10:37,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:10:37,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373205857] [2024-06-04 16:10:37,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:10:37,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:10:37,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:10:37,721 INFO 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 16:10:37,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:10:37,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373205857] [2024-06-04 16:10:37,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373205857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:10:37,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:10:37,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:10:37,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051120825] [2024-06-04 16:10:37,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:10:37,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:10:37,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:10:37,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:10:37,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:10:37,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:10:37,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 453 transitions, 8047 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 16:10:37,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:10:37,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:10:37,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:10:38,739 INFO L124 PetriNetUnfolderBase]: 3003/5106 cut-off events. [2024-06-04 16:10:38,739 INFO L125 PetriNetUnfolderBase]: For 715166/715166 co-relation queries the response was YES. [2024-06-04 16:10:38,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39797 conditions, 5106 events. 3003/5106 cut-off events. For 715166/715166 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 34135 event pairs, 663 based on Foata normal form. 1/5098 useless extension candidates. Maximal degree in co-relation 39623. Up to 4023 conditions per place. [2024-06-04 16:10:38,812 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 239 selfloop transitions, 230 changer transitions 0/476 dead transitions. [2024-06-04 16:10:38,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 476 transitions, 9487 flow [2024-06-04 16:10:38,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:10:38,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:10:38,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 246 transitions. [2024-06-04 16:10:38,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5324675324675324 [2024-06-04 16:10:38,813 INFO L175 Difference]: Start difference. First operand has 390 places, 453 transitions, 8047 flow. Second operand 11 states and 246 transitions. [2024-06-04 16:10:38,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 476 transitions, 9487 flow [2024-06-04 16:10:42,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 476 transitions, 8995 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-06-04 16:10:42,379 INFO L231 Difference]: Finished difference. Result has 391 places, 453 transitions, 8021 flow [2024-06-04 16:10:42,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7555, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8021, PETRI_PLACES=391, PETRI_TRANSITIONS=453} [2024-06-04 16:10:42,380 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 348 predicate places. [2024-06-04 16:10:42,380 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 453 transitions, 8021 flow [2024-06-04 16:10:42,380 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 16:10:42,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:10:42,380 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 16:10:42,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-04 16:10:42,380 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 16:10:42,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:10:42,380 INFO L85 PathProgramCache]: Analyzing trace with hash -438646156, now seen corresponding path program 16 times [2024-06-04 16:10:42,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:10:42,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35260862] [2024-06-04 16:10:42,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:10:42,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:10:42,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:10:42,579 INFO 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 16:10:42,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:10:42,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35260862] [2024-06-04 16:10:42,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35260862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:10:42,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:10:42,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:10:42,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113750678] [2024-06-04 16:10:42,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:10:42,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:10:42,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:10:42,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:10:42,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:10:42,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:10:42,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 453 transitions, 8021 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 16:10:42,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:10:42,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:10:42,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:10:43,566 INFO L124 PetriNetUnfolderBase]: 3000/5110 cut-off events. [2024-06-04 16:10:43,567 INFO L125 PetriNetUnfolderBase]: For 720761/720761 co-relation queries the response was YES. [2024-06-04 16:10:43,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39732 conditions, 5110 events. 3000/5110 cut-off events. For 720761/720761 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 34176 event pairs, 671 based on Foata normal form. 1/5102 useless extension candidates. Maximal degree in co-relation 39557. Up to 4021 conditions per place. [2024-06-04 16:10:43,662 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 241 selfloop transitions, 227 changer transitions 0/475 dead transitions. [2024-06-04 16:10:43,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 475 transitions, 9235 flow [2024-06-04 16:10:43,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:10:43,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:10:43,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 244 transitions. [2024-06-04 16:10:43,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5281385281385281 [2024-06-04 16:10:43,663 INFO L175 Difference]: Start difference. First operand has 391 places, 453 transitions, 8021 flow. Second operand 11 states and 244 transitions. [2024-06-04 16:10:43,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 475 transitions, 9235 flow [2024-06-04 16:10:47,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 475 transitions, 8901 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-04 16:10:47,083 INFO L231 Difference]: Finished difference. Result has 395 places, 453 transitions, 8147 flow [2024-06-04 16:10:47,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7687, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8147, PETRI_PLACES=395, PETRI_TRANSITIONS=453} [2024-06-04 16:10:47,083 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 352 predicate places. [2024-06-04 16:10:47,083 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 453 transitions, 8147 flow [2024-06-04 16:10:47,083 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 16:10:47,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:10:47,083 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 16:10:47,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-04 16:10:47,084 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 16:10:47,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:10:47,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1428801896, now seen corresponding path program 17 times [2024-06-04 16:10:47,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:10:47,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543244193] [2024-06-04 16:10:47,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:10:47,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:10:47,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:10:47,277 INFO 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 16:10:47,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:10:47,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543244193] [2024-06-04 16:10:47,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543244193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:10:47,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:10:47,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:10:47,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403479847] [2024-06-04 16:10:47,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:10:47,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:10:47,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:10:47,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:10:47,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:10:47,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:10:47,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 453 transitions, 8147 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:10:47,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:10:47,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:10:47,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:10:48,321 INFO L124 PetriNetUnfolderBase]: 3026/5175 cut-off events. [2024-06-04 16:10:48,322 INFO L125 PetriNetUnfolderBase]: For 755339/755343 co-relation queries the response was YES. [2024-06-04 16:10:48,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40453 conditions, 5175 events. 3026/5175 cut-off events. For 755339/755343 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 34824 event pairs, 656 based on Foata normal form. 6/5178 useless extension candidates. Maximal degree in co-relation 40277. Up to 4454 conditions per place. [2024-06-04 16:10:48,399 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 390 selfloop transitions, 81 changer transitions 0/478 dead transitions. [2024-06-04 16:10:48,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 478 transitions, 9541 flow [2024-06-04 16:10:48,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:10:48,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:10:48,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-04 16:10:48,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544217687074829 [2024-06-04 16:10:48,400 INFO L175 Difference]: Start difference. First operand has 395 places, 453 transitions, 8147 flow. Second operand 7 states and 163 transitions. [2024-06-04 16:10:48,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 478 transitions, 9541 flow [2024-06-04 16:10:52,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 478 transitions, 8910 flow, removed 1 selfloop flow, removed 11 redundant places. [2024-06-04 16:10:52,337 INFO L231 Difference]: Finished difference. Result has 392 places, 463 transitions, 7932 flow [2024-06-04 16:10:52,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7543, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7932, PETRI_PLACES=392, PETRI_TRANSITIONS=463} [2024-06-04 16:10:52,337 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 349 predicate places. [2024-06-04 16:10:52,338 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 463 transitions, 7932 flow [2024-06-04 16:10:52,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:10:52,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:10:52,338 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 16:10:52,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-04 16:10:52,338 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 16:10:52,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:10:52,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1193026822, now seen corresponding path program 18 times [2024-06-04 16:10:52,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:10:52,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680639236] [2024-06-04 16:10:52,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:10:52,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:10:52,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:10:52,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:10:52,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:10:52,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680639236] [2024-06-04 16:10:52,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680639236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:10:52,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:10:52,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:10:52,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164000998] [2024-06-04 16:10:52,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:10:52,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:10:52,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:10:52,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:10:52,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:10:52,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:10:52,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 463 transitions, 7932 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 16:10:52,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:10:52,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:10:52,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:10:53,558 INFO L124 PetriNetUnfolderBase]: 3020/5158 cut-off events. [2024-06-04 16:10:53,558 INFO L125 PetriNetUnfolderBase]: For 748191/748191 co-relation queries the response was YES. [2024-06-04 16:10:53,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39811 conditions, 5158 events. 3020/5158 cut-off events. For 748191/748191 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 34648 event pairs, 683 based on Foata normal form. 2/5151 useless extension candidates. Maximal degree in co-relation 39633. Up to 4338 conditions per place. [2024-06-04 16:10:53,627 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 342 selfloop transitions, 134 changer transitions 0/483 dead transitions. [2024-06-04 16:10:53,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 483 transitions, 9620 flow [2024-06-04 16:10:53,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:10:53,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:10:53,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 227 transitions. [2024-06-04 16:10:53,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5404761904761904 [2024-06-04 16:10:53,628 INFO L175 Difference]: Start difference. First operand has 392 places, 463 transitions, 7932 flow. Second operand 10 states and 227 transitions. [2024-06-04 16:10:53,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 483 transitions, 9620 flow [2024-06-04 16:10:57,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 483 transitions, 9454 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-04 16:10:57,212 INFO L231 Difference]: Finished difference. Result has 398 places, 463 transitions, 8041 flow [2024-06-04 16:10:57,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7766, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8041, PETRI_PLACES=398, PETRI_TRANSITIONS=463} [2024-06-04 16:10:57,213 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 355 predicate places. [2024-06-04 16:10:57,213 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 463 transitions, 8041 flow [2024-06-04 16:10:57,213 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 16:10:57,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:10:57,213 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 16:10:57,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-04 16:10:57,213 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 16:10:57,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:10:57,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1770133414, now seen corresponding path program 19 times [2024-06-04 16:10:57,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:10:57,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156702456] [2024-06-04 16:10:57,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:10:57,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:10:57,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:10:57,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:10:57,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:10:57,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156702456] [2024-06-04 16:10:57,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156702456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:10:57,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:10:57,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:10:57,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540709494] [2024-06-04 16:10:57,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:10:57,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:10:57,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:10:57,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:10:57,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:10:57,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:10:57,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 463 transitions, 8041 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 16:10:57,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:10:57,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:10:57,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:10:58,372 INFO L124 PetriNetUnfolderBase]: 3014/5150 cut-off events. [2024-06-04 16:10:58,372 INFO L125 PetriNetUnfolderBase]: For 747422/747422 co-relation queries the response was YES. [2024-06-04 16:10:58,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39752 conditions, 5150 events. 3014/5150 cut-off events. For 747422/747422 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 34652 event pairs, 681 based on Foata normal form. 2/5143 useless extension candidates. Maximal degree in co-relation 39573. Up to 4039 conditions per place. [2024-06-04 16:10:58,444 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 248 selfloop transitions, 227 changer transitions 0/482 dead transitions. [2024-06-04 16:10:58,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 482 transitions, 9499 flow [2024-06-04 16:10:58,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:10:58,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:10:58,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 228 transitions. [2024-06-04 16:10:58,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-06-04 16:10:58,445 INFO L175 Difference]: Start difference. First operand has 398 places, 463 transitions, 8041 flow. Second operand 10 states and 228 transitions. [2024-06-04 16:10:58,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 482 transitions, 9499 flow [2024-06-04 16:11:01,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 482 transitions, 8945 flow, removed 67 selfloop flow, removed 9 redundant places. [2024-06-04 16:11:01,827 INFO L231 Difference]: Finished difference. Result has 399 places, 463 transitions, 7948 flow [2024-06-04 16:11:01,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7487, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7948, PETRI_PLACES=399, PETRI_TRANSITIONS=463} [2024-06-04 16:11:01,827 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 356 predicate places. [2024-06-04 16:11:01,827 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 463 transitions, 7948 flow [2024-06-04 16:11:01,827 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 16:11:01,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:11:01,828 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 16:11:01,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-04 16:11:01,828 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 16:11:01,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:11:01,828 INFO L85 PathProgramCache]: Analyzing trace with hash 284000846, now seen corresponding path program 20 times [2024-06-04 16:11:01,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:11:01,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237873428] [2024-06-04 16:11:01,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:11:01,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:11:01,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:11:02,044 INFO 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 16:11:02,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:11:02,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237873428] [2024-06-04 16:11:02,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237873428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:11:02,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:11:02,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:11:02,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362441829] [2024-06-04 16:11:02,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:11:02,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:11:02,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:11:02,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:11:02,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:11:02,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:11:02,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 463 transitions, 7948 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 16:11:02,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:11:02,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:11:02,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:11:03,074 INFO L124 PetriNetUnfolderBase]: 3008/5126 cut-off events. [2024-06-04 16:11:03,075 INFO L125 PetriNetUnfolderBase]: For 747914/747914 co-relation queries the response was YES. [2024-06-04 16:11:03,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39137 conditions, 5126 events. 3008/5126 cut-off events. For 747914/747914 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 34405 event pairs, 669 based on Foata normal form. 2/5119 useless extension candidates. Maximal degree in co-relation 38961. Up to 4034 conditions per place. [2024-06-04 16:11:03,145 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 247 selfloop transitions, 227 changer transitions 0/481 dead transitions. [2024-06-04 16:11:03,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 481 transitions, 9172 flow [2024-06-04 16:11:03,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:11:03,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:11:03,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-04 16:11:03,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-04 16:11:03,146 INFO L175 Difference]: Start difference. First operand has 399 places, 463 transitions, 7948 flow. Second operand 10 states and 225 transitions. [2024-06-04 16:11:03,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 481 transitions, 9172 flow [2024-06-04 16:11:06,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 481 transitions, 8800 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-04 16:11:06,541 INFO L231 Difference]: Finished difference. Result has 402 places, 463 transitions, 8037 flow [2024-06-04 16:11:06,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7576, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8037, PETRI_PLACES=402, PETRI_TRANSITIONS=463} [2024-06-04 16:11:06,542 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 359 predicate places. [2024-06-04 16:11:06,542 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 463 transitions, 8037 flow [2024-06-04 16:11:06,542 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 16:11:06,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:11:06,542 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 16:11:06,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-04 16:11:06,542 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 16:11:06,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:11:06,543 INFO L85 PathProgramCache]: Analyzing trace with hash 119714200, now seen corresponding path program 21 times [2024-06-04 16:11:06,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:11:06,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890875491] [2024-06-04 16:11:06,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:11:06,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:11:06,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:11:06,736 INFO 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 16:11:06,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:11:06,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890875491] [2024-06-04 16:11:06,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890875491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:11:06,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:11:06,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:11:06,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473625035] [2024-06-04 16:11:06,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:11:06,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:11:06,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:11:06,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:11:06,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:11:06,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:11:06,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 463 transitions, 8037 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:11:06,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:11:06,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:11:06,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:11:07,824 INFO L124 PetriNetUnfolderBase]: 3018/5185 cut-off events. [2024-06-04 16:11:07,824 INFO L125 PetriNetUnfolderBase]: For 758466/758466 co-relation queries the response was YES. [2024-06-04 16:11:07,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39460 conditions, 5185 events. 3018/5185 cut-off events. For 758466/758466 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 34971 event pairs, 630 based on Foata normal form. 2/5185 useless extension candidates. Maximal degree in co-relation 39283. Up to 4302 conditions per place. [2024-06-04 16:11:07,891 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 346 selfloop transitions, 147 changer transitions 0/500 dead transitions. [2024-06-04 16:11:07,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 500 transitions, 9905 flow [2024-06-04 16:11:07,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:11:07,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:11:07,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-04 16:11:07,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6160714285714286 [2024-06-04 16:11:07,892 INFO L175 Difference]: Start difference. First operand has 402 places, 463 transitions, 8037 flow. Second operand 8 states and 207 transitions. [2024-06-04 16:11:07,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 500 transitions, 9905 flow [2024-06-04 16:11:12,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 500 transitions, 9427 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-04 16:11:12,104 INFO L231 Difference]: Finished difference. Result has 400 places, 467 transitions, 7969 flow [2024-06-04 16:11:12,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7565, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7969, PETRI_PLACES=400, PETRI_TRANSITIONS=467} [2024-06-04 16:11:12,105 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 357 predicate places. [2024-06-04 16:11:12,105 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 467 transitions, 7969 flow [2024-06-04 16:11:12,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:11:12,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:11:12,105 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 16:11:12,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-04 16:11:12,105 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 16:11:12,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:11:12,106 INFO L85 PathProgramCache]: Analyzing trace with hash 132373546, now seen corresponding path program 22 times [2024-06-04 16:11:12,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:11:12,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695302118] [2024-06-04 16:11:12,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:11:12,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:11:12,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:11:12,291 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 16:11:12,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:11:12,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695302118] [2024-06-04 16:11:12,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695302118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:11:12,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:11:12,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:11:12,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197319834] [2024-06-04 16:11:12,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:11:12,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:11:12,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:11:12,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:11:12,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:11:12,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:11:12,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 467 transitions, 7969 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:11:12,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:11:12,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:11:12,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:11:13,221 INFO L124 PetriNetUnfolderBase]: 3012/5160 cut-off events. [2024-06-04 16:11:13,221 INFO L125 PetriNetUnfolderBase]: For 755982/755982 co-relation queries the response was YES. [2024-06-04 16:11:13,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39097 conditions, 5160 events. 3012/5160 cut-off events. For 755982/755982 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 34726 event pairs, 642 based on Foata normal form. 2/5159 useless extension candidates. Maximal degree in co-relation 38919. Up to 4297 conditions per place. [2024-06-04 16:11:13,292 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 357 selfloop transitions, 127 changer transitions 0/491 dead transitions. [2024-06-04 16:11:13,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 491 transitions, 9235 flow [2024-06-04 16:11:13,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:11:13,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:11:13,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-04 16:11:13,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6054421768707483 [2024-06-04 16:11:13,293 INFO L175 Difference]: Start difference. First operand has 400 places, 467 transitions, 7969 flow. Second operand 7 states and 178 transitions. [2024-06-04 16:11:13,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 491 transitions, 9235 flow [2024-06-04 16:11:17,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 491 transitions, 8892 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-04 16:11:17,691 INFO L231 Difference]: Finished difference. Result has 400 places, 467 transitions, 7895 flow [2024-06-04 16:11:17,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7630, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7895, PETRI_PLACES=400, PETRI_TRANSITIONS=467} [2024-06-04 16:11:17,691 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 357 predicate places. [2024-06-04 16:11:17,691 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 467 transitions, 7895 flow [2024-06-04 16:11:17,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:11:17,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:11:17,692 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 16:11:17,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-04 16:11:17,692 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 16:11:17,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:11:17,692 INFO L85 PathProgramCache]: Analyzing trace with hash 100625068, now seen corresponding path program 23 times [2024-06-04 16:11:17,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:11:17,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643725650] [2024-06-04 16:11:17,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:11:17,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:11:17,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:11:17,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:11:17,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:11:17,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643725650] [2024-06-04 16:11:17,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643725650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:11:17,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:11:17,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:11:17,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452972241] [2024-06-04 16:11:17,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:11:17,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:11:17,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:11:17,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:11:17,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:11:17,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:11:17,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 467 transitions, 7895 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 16:11:17,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:11:17,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:11:17,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:11:18,873 INFO L124 PetriNetUnfolderBase]: 3006/5152 cut-off events. [2024-06-04 16:11:18,873 INFO L125 PetriNetUnfolderBase]: For 729087/729087 co-relation queries the response was YES. [2024-06-04 16:11:18,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38632 conditions, 5152 events. 3006/5152 cut-off events. For 729087/729087 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 34697 event pairs, 642 based on Foata normal form. 2/5151 useless extension candidates. Maximal degree in co-relation 38455. Up to 4292 conditions per place. [2024-06-04 16:11:18,946 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 360 selfloop transitions, 128 changer transitions 0/495 dead transitions. [2024-06-04 16:11:18,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 495 transitions, 9177 flow [2024-06-04 16:11:18,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:11:18,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:11:18,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-04 16:11:18,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5982142857142857 [2024-06-04 16:11:18,947 INFO L175 Difference]: Start difference. First operand has 400 places, 467 transitions, 7895 flow. Second operand 8 states and 201 transitions. [2024-06-04 16:11:18,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 495 transitions, 9177 flow [2024-06-04 16:11:23,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 495 transitions, 8844 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-04 16:11:23,119 INFO L231 Difference]: Finished difference. Result has 401 places, 467 transitions, 7831 flow [2024-06-04 16:11:23,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7564, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7831, PETRI_PLACES=401, PETRI_TRANSITIONS=467} [2024-06-04 16:11:23,119 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 358 predicate places. [2024-06-04 16:11:23,119 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 467 transitions, 7831 flow [2024-06-04 16:11:23,119 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 16:11:23,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:11:23,119 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 16:11:23,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-04 16:11:23,120 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 16:11:23,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:11:23,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1476785092, now seen corresponding path program 5 times [2024-06-04 16:11:23,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:11:23,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39401311] [2024-06-04 16:11:23,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:11:23,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:11:23,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:11:23,357 INFO 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 16:11:23,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:11:23,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39401311] [2024-06-04 16:11:23,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39401311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:11:23,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:11:23,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:11:23,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045241293] [2024-06-04 16:11:23,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:11:23,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:11:23,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:11:23,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:11:23,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:11:23,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:11:23,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 467 transitions, 7831 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 16:11:23,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:11:23,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:11:23,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:11:24,368 INFO L124 PetriNetUnfolderBase]: 3001/5152 cut-off events. [2024-06-04 16:11:24,369 INFO L125 PetriNetUnfolderBase]: For 713706/713706 co-relation queries the response was YES. [2024-06-04 16:11:24,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38308 conditions, 5152 events. 3001/5152 cut-off events. For 713706/713706 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 34753 event pairs, 651 based on Foata normal form. 2/5149 useless extension candidates. Maximal degree in co-relation 38131. Up to 4392 conditions per place. [2024-06-04 16:11:24,438 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 365 selfloop transitions, 117 changer transitions 0/489 dead transitions. [2024-06-04 16:11:24,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 489 transitions, 8847 flow [2024-06-04 16:11:24,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:11:24,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:11:24,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-04 16:11:24,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5108225108225108 [2024-06-04 16:11:24,439 INFO L175 Difference]: Start difference. First operand has 401 places, 467 transitions, 7831 flow. Second operand 11 states and 236 transitions. [2024-06-04 16:11:24,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 489 transitions, 8847 flow [2024-06-04 16:11:28,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 489 transitions, 8427 flow, removed 27 selfloop flow, removed 9 redundant places. [2024-06-04 16:11:28,227 INFO L231 Difference]: Finished difference. Result has 403 places, 467 transitions, 7650 flow [2024-06-04 16:11:28,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7411, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7650, PETRI_PLACES=403, PETRI_TRANSITIONS=467} [2024-06-04 16:11:28,227 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 360 predicate places. [2024-06-04 16:11:28,227 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 467 transitions, 7650 flow [2024-06-04 16:11:28,227 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 16:11:28,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:11:28,228 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 16:11:28,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-04 16:11:28,228 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 16:11:28,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:11:28,228 INFO L85 PathProgramCache]: Analyzing trace with hash 209888090, now seen corresponding path program 6 times [2024-06-04 16:11:28,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:11:28,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055041231] [2024-06-04 16:11:28,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:11:28,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:11:28,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:11:28,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:11:28,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:11:28,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055041231] [2024-06-04 16:11:28,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055041231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:11:28,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:11:28,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:11:28,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452613698] [2024-06-04 16:11:28,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:11:28,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:11:28,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:11:28,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:11:28,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:11:28,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:11:28,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 467 transitions, 7650 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 16:11:28,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:11:28,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:11:28,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:11:29,445 INFO L124 PetriNetUnfolderBase]: 3068/5250 cut-off events. [2024-06-04 16:11:29,445 INFO L125 PetriNetUnfolderBase]: For 784724/784728 co-relation queries the response was YES. [2024-06-04 16:11:29,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39804 conditions, 5250 events. 3068/5250 cut-off events. For 784724/784728 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 35415 event pairs, 646 based on Foata normal form. 6/5253 useless extension candidates. Maximal degree in co-relation 39629. Up to 4582 conditions per place. [2024-06-04 16:11:29,520 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 447 selfloop transitions, 45 changer transitions 0/499 dead transitions. [2024-06-04 16:11:29,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 499 transitions, 9048 flow [2024-06-04 16:11:29,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:11:29,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:11:29,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 205 transitions. [2024-06-04 16:11:29,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5423280423280423 [2024-06-04 16:11:29,521 INFO L175 Difference]: Start difference. First operand has 403 places, 467 transitions, 7650 flow. Second operand 9 states and 205 transitions. [2024-06-04 16:11:29,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 499 transitions, 9048 flow [2024-06-04 16:11:33,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 499 transitions, 8811 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-04 16:11:33,661 INFO L231 Difference]: Finished difference. Result has 404 places, 471 transitions, 7618 flow [2024-06-04 16:11:33,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7413, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7618, PETRI_PLACES=404, PETRI_TRANSITIONS=471} [2024-06-04 16:11:33,661 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 361 predicate places. [2024-06-04 16:11:33,661 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 471 transitions, 7618 flow [2024-06-04 16:11:33,661 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 16:11:33,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:11:33,661 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 16:11:33,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-04 16:11:33,661 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 16:11:33,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:11:33,662 INFO L85 PathProgramCache]: Analyzing trace with hash -409968630, now seen corresponding path program 7 times [2024-06-04 16:11:33,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:11:33,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668796631] [2024-06-04 16:11:33,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:11:33,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:11:33,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:11:33,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:11:33,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:11:33,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668796631] [2024-06-04 16:11:33,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668796631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:11:33,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:11:33,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:11:33,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40781169] [2024-06-04 16:11:33,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:11:33,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:11:33,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:11:33,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:11:33,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:11:33,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:11:33,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 471 transitions, 7618 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 16:11:33,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:11:33,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:11:33,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:11:34,839 INFO L124 PetriNetUnfolderBase]: 3076/5272 cut-off events. [2024-06-04 16:11:34,839 INFO L125 PetriNetUnfolderBase]: For 797502/797506 co-relation queries the response was YES. [2024-06-04 16:11:34,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39991 conditions, 5272 events. 3076/5272 cut-off events. For 797502/797506 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 35627 event pairs, 656 based on Foata normal form. 6/5276 useless extension candidates. Maximal degree in co-relation 39814. Up to 4505 conditions per place. [2024-06-04 16:11:34,914 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 373 selfloop transitions, 114 changer transitions 0/494 dead transitions. [2024-06-04 16:11:34,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 494 transitions, 8697 flow [2024-06-04 16:11:34,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:11:34,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:11:34,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-04 16:11:34,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5190476190476191 [2024-06-04 16:11:34,915 INFO L175 Difference]: Start difference. First operand has 404 places, 471 transitions, 7618 flow. Second operand 10 states and 218 transitions. [2024-06-04 16:11:34,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 494 transitions, 8697 flow [2024-06-04 16:11:38,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 494 transitions, 8570 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-04 16:11:38,448 INFO L231 Difference]: Finished difference. Result has 408 places, 473 transitions, 7783 flow [2024-06-04 16:11:38,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7499, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7783, PETRI_PLACES=408, PETRI_TRANSITIONS=473} [2024-06-04 16:11:38,448 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 365 predicate places. [2024-06-04 16:11:38,448 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 473 transitions, 7783 flow [2024-06-04 16:11:38,449 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 16:11:38,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:11:38,449 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 16:11:38,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-04 16:11:38,449 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 16:11:38,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:11:38,449 INFO L85 PathProgramCache]: Analyzing trace with hash -2116787060, now seen corresponding path program 8 times [2024-06-04 16:11:38,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:11:38,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18146993] [2024-06-04 16:11:38,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:11:38,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:11:38,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:11:38,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:11:38,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:11:38,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18146993] [2024-06-04 16:11:38,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18146993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:11:38,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:11:38,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:11:38,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838711457] [2024-06-04 16:11:38,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:11:38,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:11:38,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:11:38,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:11:38,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:11:38,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:11:38,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 473 transitions, 7783 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 16:11:38,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:11:38,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:11:38,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:11:39,700 INFO L124 PetriNetUnfolderBase]: 3202/5502 cut-off events. [2024-06-04 16:11:39,700 INFO L125 PetriNetUnfolderBase]: For 954838/954842 co-relation queries the response was YES. [2024-06-04 16:11:39,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44114 conditions, 5502 events. 3202/5502 cut-off events. For 954838/954842 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 37530 event pairs, 553 based on Foata normal form. 6/5506 useless extension candidates. Maximal degree in co-relation 43936. Up to 3350 conditions per place. [2024-06-04 16:11:39,779 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 357 selfloop transitions, 148 changer transitions 0/512 dead transitions. [2024-06-04 16:11:39,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 512 transitions, 9542 flow [2024-06-04 16:11:39,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:11:39,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:11:39,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-04 16:11:39,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-04 16:11:39,780 INFO L175 Difference]: Start difference. First operand has 408 places, 473 transitions, 7783 flow. Second operand 9 states and 213 transitions. [2024-06-04 16:11:39,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 512 transitions, 9542 flow [2024-06-04 16:11:44,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 512 transitions, 9283 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-04 16:11:44,610 INFO L231 Difference]: Finished difference. Result has 410 places, 479 transitions, 8010 flow [2024-06-04 16:11:44,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7524, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8010, PETRI_PLACES=410, PETRI_TRANSITIONS=479} [2024-06-04 16:11:44,610 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 367 predicate places. [2024-06-04 16:11:44,610 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 479 transitions, 8010 flow [2024-06-04 16:11:44,611 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 16:11:44,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:11:44,611 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 16:11:44,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-04 16:11:44,611 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:11:44,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:11:44,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1548480616, now seen corresponding path program 9 times [2024-06-04 16:11:44,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:11:44,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907578015] [2024-06-04 16:11:44,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:11:44,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:11:44,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:11:44,817 INFO 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 16:11:44,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:11:44,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907578015] [2024-06-04 16:11:44,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907578015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:11:44,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:11:44,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:11:44,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004348983] [2024-06-04 16:11:44,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:11:44,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:11:44,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:11:44,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:11:44,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:11:44,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:11:44,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 479 transitions, 8010 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 16:11:44,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:11:44,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:11:44,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:11:45,997 INFO L124 PetriNetUnfolderBase]: 3177/5455 cut-off events. [2024-06-04 16:11:45,997 INFO L125 PetriNetUnfolderBase]: For 960280/960284 co-relation queries the response was YES. [2024-06-04 16:11:46,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43726 conditions, 5455 events. 3177/5455 cut-off events. For 960280/960284 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 37173 event pairs, 618 based on Foata normal form. 12/5465 useless extension candidates. Maximal degree in co-relation 43546. Up to 3336 conditions per place. [2024-06-04 16:11:46,064 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 366 selfloop transitions, 136 changer transitions 0/509 dead transitions. [2024-06-04 16:11:46,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 509 transitions, 9362 flow [2024-06-04 16:11:46,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:11:46,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:11:46,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-04 16:11:46,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-04 16:11:46,065 INFO L175 Difference]: Start difference. First operand has 410 places, 479 transitions, 8010 flow. Second operand 9 states and 210 transitions. [2024-06-04 16:11:46,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 509 transitions, 9362 flow [2024-06-04 16:11:50,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 509 transitions, 9106 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-04 16:11:50,379 INFO L231 Difference]: Finished difference. Result has 414 places, 479 transitions, 8032 flow [2024-06-04 16:11:50,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7754, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8032, PETRI_PLACES=414, PETRI_TRANSITIONS=479} [2024-06-04 16:11:50,379 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 371 predicate places. [2024-06-04 16:11:50,379 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 479 transitions, 8032 flow [2024-06-04 16:11:50,379 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 16:11:50,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:11:50,380 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 16:11:50,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-04 16:11:50,380 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:11:50,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:11:50,380 INFO L85 PathProgramCache]: Analyzing trace with hash -2028132020, now seen corresponding path program 10 times [2024-06-04 16:11:50,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:11:50,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123546819] [2024-06-04 16:11:50,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:11:50,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:11:50,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:11:50,583 INFO 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 16:11:50,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:11:50,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123546819] [2024-06-04 16:11:50,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123546819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:11:50,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:11:50,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:11:50,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979314520] [2024-06-04 16:11:50,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:11:50,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:11:50,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:11:50,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:11:50,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:11:50,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:11:50,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 479 transitions, 8032 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 16:11:50,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:11:50,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:11:50,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:11:51,606 INFO L124 PetriNetUnfolderBase]: 3154/5428 cut-off events. [2024-06-04 16:11:51,606 INFO L125 PetriNetUnfolderBase]: For 915853/915857 co-relation queries the response was YES. [2024-06-04 16:11:51,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42145 conditions, 5428 events. 3154/5428 cut-off events. For 915853/915857 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 37120 event pairs, 690 based on Foata normal form. 14/5440 useless extension candidates. Maximal degree in co-relation 41965. Up to 4591 conditions per place. [2024-06-04 16:11:51,681 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 388 selfloop transitions, 104 changer transitions 0/499 dead transitions. [2024-06-04 16:11:51,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 499 transitions, 9080 flow [2024-06-04 16:11:51,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:11:51,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:11:51,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-04 16:11:51,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5343915343915344 [2024-06-04 16:11:51,682 INFO L175 Difference]: Start difference. First operand has 414 places, 479 transitions, 8032 flow. Second operand 9 states and 202 transitions. [2024-06-04 16:11:51,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 499 transitions, 9080 flow [2024-06-04 16:11:55,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 499 transitions, 8834 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-04 16:11:55,992 INFO L231 Difference]: Finished difference. Result has 416 places, 479 transitions, 8000 flow [2024-06-04 16:11:55,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7786, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8000, PETRI_PLACES=416, PETRI_TRANSITIONS=479} [2024-06-04 16:11:55,992 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 373 predicate places. [2024-06-04 16:11:55,992 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 479 transitions, 8000 flow [2024-06-04 16:11:55,993 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 16:11:55,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:11:55,993 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 16:11:55,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-04 16:11:55,993 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:11:55,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:11:55,993 INFO L85 PathProgramCache]: Analyzing trace with hash -948120, now seen corresponding path program 11 times [2024-06-04 16:11:55,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:11:55,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741778276] [2024-06-04 16:11:55,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:11:55,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:11:55,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:11:56,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:11:56,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:11:56,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741778276] [2024-06-04 16:11:56,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741778276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:11:56,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:11:56,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:11:56,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63941427] [2024-06-04 16:11:56,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:11:56,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:11:56,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:11:56,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:11:56,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:11:56,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:11:56,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 479 transitions, 8000 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 16:11:56,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:11:56,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:11:56,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:11:57,169 INFO L124 PetriNetUnfolderBase]: 3124/5380 cut-off events. [2024-06-04 16:11:57,169 INFO L125 PetriNetUnfolderBase]: For 852541/852545 co-relation queries the response was YES. [2024-06-04 16:11:57,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40273 conditions, 5380 events. 3124/5380 cut-off events. For 852541/852545 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 36755 event pairs, 660 based on Foata normal form. 14/5392 useless extension candidates. Maximal degree in co-relation 40092. Up to 4339 conditions per place. [2024-06-04 16:11:57,245 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 387 selfloop transitions, 109 changer transitions 0/503 dead transitions. [2024-06-04 16:11:57,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 503 transitions, 9082 flow [2024-06-04 16:11:57,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:11:57,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:11:57,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 205 transitions. [2024-06-04 16:11:57,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5423280423280423 [2024-06-04 16:11:57,246 INFO L175 Difference]: Start difference. First operand has 416 places, 479 transitions, 8000 flow. Second operand 9 states and 205 transitions. [2024-06-04 16:11:57,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 503 transitions, 9082 flow [2024-06-04 16:12:00,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 503 transitions, 8896 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-04 16:12:00,949 INFO L231 Difference]: Finished difference. Result has 419 places, 479 transitions, 8039 flow [2024-06-04 16:12:00,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7814, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8039, PETRI_PLACES=419, PETRI_TRANSITIONS=479} [2024-06-04 16:12:00,949 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 376 predicate places. [2024-06-04 16:12:00,949 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 479 transitions, 8039 flow [2024-06-04 16:12:00,949 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 16:12:00,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:12:00,950 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 16:12:00,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-04 16:12:00,950 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:12:00,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:12:00,950 INFO L85 PathProgramCache]: Analyzing trace with hash -936518376, now seen corresponding path program 12 times [2024-06-04 16:12:00,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:12:00,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990773344] [2024-06-04 16:12:00,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:12:00,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:12:00,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:12:01,170 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 16:12:01,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:12:01,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990773344] [2024-06-04 16:12:01,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990773344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:12:01,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:12:01,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:12:01,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911887552] [2024-06-04 16:12:01,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:12:01,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:12:01,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:12:01,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:12:01,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:12:01,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:12:01,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 479 transitions, 8039 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 16:12:01,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:12:01,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:12:01,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:12:02,224 INFO L124 PetriNetUnfolderBase]: 3160/5425 cut-off events. [2024-06-04 16:12:02,224 INFO L125 PetriNetUnfolderBase]: For 869525/869525 co-relation queries the response was YES. [2024-06-04 16:12:02,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40777 conditions, 5425 events. 3160/5425 cut-off events. For 869525/869525 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 37045 event pairs, 686 based on Foata normal form. 10/5430 useless extension candidates. Maximal degree in co-relation 40595. Up to 4732 conditions per place. [2024-06-04 16:12:02,299 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 434 selfloop transitions, 59 changer transitions 0/500 dead transitions. [2024-06-04 16:12:02,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 500 transitions, 9142 flow [2024-06-04 16:12:02,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:12:02,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:12:02,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-04 16:12:02,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5386904761904762 [2024-06-04 16:12:02,300 INFO L175 Difference]: Start difference. First operand has 419 places, 479 transitions, 8039 flow. Second operand 8 states and 181 transitions. [2024-06-04 16:12:02,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 500 transitions, 9142 flow [2024-06-04 16:12:06,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 500 transitions, 8863 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-04 16:12:06,548 INFO L231 Difference]: Finished difference. Result has 418 places, 481 transitions, 7943 flow [2024-06-04 16:12:06,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7760, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7943, PETRI_PLACES=418, PETRI_TRANSITIONS=481} [2024-06-04 16:12:06,548 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 375 predicate places. [2024-06-04 16:12:06,548 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 481 transitions, 7943 flow [2024-06-04 16:12:06,548 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 16:12:06,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:12:06,548 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 16:12:06,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-04 16:12:06,549 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:12:06,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:12:06,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1661859752, now seen corresponding path program 13 times [2024-06-04 16:12:06,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:12:06,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116877982] [2024-06-04 16:12:06,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:12:06,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:12:06,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:12:06,765 INFO 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 16:12:06,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:12:06,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116877982] [2024-06-04 16:12:06,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116877982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:12:06,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:12:06,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:12:06,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632233342] [2024-06-04 16:12:06,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:12:06,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:12:06,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:12:06,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:12:06,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:12:06,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:12:06,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 481 transitions, 7943 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 16:12:06,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:12:06,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:12:06,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:12:07,825 INFO L124 PetriNetUnfolderBase]: 3137/5392 cut-off events. [2024-06-04 16:12:07,825 INFO L125 PetriNetUnfolderBase]: For 801891/801891 co-relation queries the response was YES. [2024-06-04 16:12:07,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39175 conditions, 5392 events. 3137/5392 cut-off events. For 801891/801891 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 36862 event pairs, 677 based on Foata normal form. 10/5397 useless extension candidates. Maximal degree in co-relation 38992. Up to 4568 conditions per place. [2024-06-04 16:12:07,903 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 382 selfloop transitions, 115 changer transitions 0/504 dead transitions. [2024-06-04 16:12:07,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 504 transitions, 9007 flow [2024-06-04 16:12:07,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:12:07,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:12:07,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 260 transitions. [2024-06-04 16:12:07,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158730158730159 [2024-06-04 16:12:07,904 INFO L175 Difference]: Start difference. First operand has 418 places, 481 transitions, 7943 flow. Second operand 12 states and 260 transitions. [2024-06-04 16:12:07,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 504 transitions, 9007 flow [2024-06-04 16:12:12,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 504 transitions, 8863 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-04 16:12:12,362 INFO L231 Difference]: Finished difference. Result has 424 places, 481 transitions, 8035 flow [2024-06-04 16:12:12,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7799, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8035, PETRI_PLACES=424, PETRI_TRANSITIONS=481} [2024-06-04 16:12:12,363 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 381 predicate places. [2024-06-04 16:12:12,363 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 481 transitions, 8035 flow [2024-06-04 16:12:12,363 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 16:12:12,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:12:12,363 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 16:12:12,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-04 16:12:12,363 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:12:12,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:12:12,363 INFO L85 PathProgramCache]: Analyzing trace with hash 550239882, now seen corresponding path program 14 times [2024-06-04 16:12:12,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:12:12,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400073058] [2024-06-04 16:12:12,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:12:12,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:12:12,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:12:12,576 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 16:12:12,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:12:12,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400073058] [2024-06-04 16:12:12,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400073058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:12:12,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:12:12,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:12:12,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429663593] [2024-06-04 16:12:12,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:12:12,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:12:12,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:12:12,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:12:12,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:12:12,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:12:12,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 481 transitions, 8035 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 16:12:12,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:12:12,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:12:12,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:12:13,588 INFO L124 PetriNetUnfolderBase]: 3107/5344 cut-off events. [2024-06-04 16:12:13,588 INFO L125 PetriNetUnfolderBase]: For 733694/733694 co-relation queries the response was YES. [2024-06-04 16:12:13,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37719 conditions, 5344 events. 3107/5344 cut-off events. For 733694/733694 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 36491 event pairs, 647 based on Foata normal form. 10/5349 useless extension candidates. Maximal degree in co-relation 37535. Up to 4194 conditions per place. [2024-06-04 16:12:13,665 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 381 selfloop transitions, 118 changer transitions 0/506 dead transitions. [2024-06-04 16:12:13,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 506 transitions, 9125 flow [2024-06-04 16:12:13,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:12:13,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:12:13,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-04 16:12:13,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-04 16:12:13,666 INFO L175 Difference]: Start difference. First operand has 424 places, 481 transitions, 8035 flow. Second operand 10 states and 225 transitions. [2024-06-04 16:12:13,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 506 transitions, 9125 flow [2024-06-04 16:12:18,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 506 transitions, 8889 flow, removed 26 selfloop flow, removed 10 redundant places. [2024-06-04 16:12:18,167 INFO L231 Difference]: Finished difference. Result has 424 places, 481 transitions, 8043 flow [2024-06-04 16:12:18,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7799, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8043, PETRI_PLACES=424, PETRI_TRANSITIONS=481} [2024-06-04 16:12:18,167 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 381 predicate places. [2024-06-04 16:12:18,167 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 481 transitions, 8043 flow [2024-06-04 16:12:18,167 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 16:12:18,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:12:18,168 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 16:12:18,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-04 16:12:18,168 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:12:18,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:12:18,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1598344620, now seen corresponding path program 1 times [2024-06-04 16:12:18,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:12:18,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499148077] [2024-06-04 16:12:18,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:12:18,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:12:18,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:12:18,376 INFO 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 16:12:18,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:12:18,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499148077] [2024-06-04 16:12:18,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499148077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:12:18,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:12:18,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:12:18,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331771746] [2024-06-04 16:12:18,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:12:18,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:12:18,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:12:18,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:12:18,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:12:18,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:12:18,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 481 transitions, 8043 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 16:12:18,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:12:18,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:12:18,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:12:19,353 INFO L124 PetriNetUnfolderBase]: 3115/5358 cut-off events. [2024-06-04 16:12:19,353 INFO L125 PetriNetUnfolderBase]: For 685214/685214 co-relation queries the response was YES. [2024-06-04 16:12:19,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37795 conditions, 5358 events. 3115/5358 cut-off events. For 685214/685214 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 36693 event pairs, 663 based on Foata normal form. 2/5355 useless extension candidates. Maximal degree in co-relation 37610. Up to 4566 conditions per place. [2024-06-04 16:12:19,429 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 383 selfloop transitions, 110 changer transitions 0/500 dead transitions. [2024-06-04 16:12:19,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 500 transitions, 9133 flow [2024-06-04 16:12:19,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:12:19,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:12:19,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-04 16:12:19,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5264550264550265 [2024-06-04 16:12:19,430 INFO L175 Difference]: Start difference. First operand has 424 places, 481 transitions, 8043 flow. Second operand 9 states and 199 transitions. [2024-06-04 16:12:19,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 500 transitions, 9133 flow [2024-06-04 16:12:23,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 500 transitions, 8874 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-04 16:12:23,933 INFO L231 Difference]: Finished difference. Result has 424 places, 483 transitions, 8077 flow [2024-06-04 16:12:23,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7784, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8077, PETRI_PLACES=424, PETRI_TRANSITIONS=483} [2024-06-04 16:12:23,934 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 381 predicate places. [2024-06-04 16:12:23,934 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 483 transitions, 8077 flow [2024-06-04 16:12:23,934 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 16:12:23,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:12:23,934 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 16:12:23,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-04 16:12:23,934 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:12:23,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:12:23,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1583107500, now seen corresponding path program 2 times [2024-06-04 16:12:23,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:12:23,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394791308] [2024-06-04 16:12:23,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:12:23,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:12:23,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:12:24,151 INFO 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 16:12:24,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:12:24,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394791308] [2024-06-04 16:12:24,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394791308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:12:24,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:12:24,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:12:24,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646941323] [2024-06-04 16:12:24,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:12:24,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:12:24,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:12:24,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:12:24,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:12:24,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:12:24,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 483 transitions, 8077 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 16:12:24,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:12:24,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:12:24,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:12:25,222 INFO L124 PetriNetUnfolderBase]: 3123/5366 cut-off events. [2024-06-04 16:12:25,222 INFO L125 PetriNetUnfolderBase]: For 695432/695432 co-relation queries the response was YES. [2024-06-04 16:12:25,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37909 conditions, 5366 events. 3123/5366 cut-off events. For 695432/695432 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 36671 event pairs, 657 based on Foata normal form. 2/5363 useless extension candidates. Maximal degree in co-relation 37723. Up to 4558 conditions per place. [2024-06-04 16:12:25,297 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 384 selfloop transitions, 112 changer transitions 0/503 dead transitions. [2024-06-04 16:12:25,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 503 transitions, 9179 flow [2024-06-04 16:12:25,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:12:25,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:12:25,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-04 16:12:25,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5264550264550265 [2024-06-04 16:12:25,298 INFO L175 Difference]: Start difference. First operand has 424 places, 483 transitions, 8077 flow. Second operand 9 states and 199 transitions. [2024-06-04 16:12:25,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 503 transitions, 9179 flow [2024-06-04 16:12:29,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 503 transitions, 8921 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-04 16:12:29,885 INFO L231 Difference]: Finished difference. Result has 427 places, 485 transitions, 8120 flow [2024-06-04 16:12:29,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7819, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8120, PETRI_PLACES=427, PETRI_TRANSITIONS=485} [2024-06-04 16:12:29,885 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 384 predicate places. [2024-06-04 16:12:29,885 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 485 transitions, 8120 flow [2024-06-04 16:12:29,885 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 16:12:29,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:12:29,885 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 16:12:29,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-04 16:12:29,886 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:12:29,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:12:29,886 INFO L85 PathProgramCache]: Analyzing trace with hash 92963066, now seen corresponding path program 15 times [2024-06-04 16:12:29,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:12:29,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695194706] [2024-06-04 16:12:29,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:12:29,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:12:29,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:12:30,106 INFO 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 16:12:30,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:12:30,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695194706] [2024-06-04 16:12:30,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695194706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:12:30,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:12:30,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:12:30,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104931864] [2024-06-04 16:12:30,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:12:30,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:12:30,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:12:30,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:12:30,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:12:30,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:12:30,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 485 transitions, 8120 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 16:12:30,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:12:30,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:12:30,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:12:31,153 INFO L124 PetriNetUnfolderBase]: 3159/5435 cut-off events. [2024-06-04 16:12:31,153 INFO L125 PetriNetUnfolderBase]: For 775176/775176 co-relation queries the response was YES. [2024-06-04 16:12:31,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38456 conditions, 5435 events. 3159/5435 cut-off events. For 775176/775176 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 37234 event pairs, 638 based on Foata normal form. 10/5441 useless extension candidates. Maximal degree in co-relation 38269. Up to 4470 conditions per place. [2024-06-04 16:12:31,229 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 414 selfloop transitions, 102 changer transitions 0/523 dead transitions. [2024-06-04 16:12:31,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 523 transitions, 9329 flow [2024-06-04 16:12:31,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:12:31,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:12:31,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-04 16:12:31,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6160714285714286 [2024-06-04 16:12:31,229 INFO L175 Difference]: Start difference. First operand has 427 places, 485 transitions, 8120 flow. Second operand 8 states and 207 transitions. [2024-06-04 16:12:31,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 523 transitions, 9329 flow [2024-06-04 16:12:36,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 523 transitions, 9044 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-04 16:12:36,246 INFO L231 Difference]: Finished difference. Result has 428 places, 487 transitions, 8126 flow [2024-06-04 16:12:36,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7835, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8126, PETRI_PLACES=428, PETRI_TRANSITIONS=487} [2024-06-04 16:12:36,246 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 385 predicate places. [2024-06-04 16:12:36,247 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 487 transitions, 8126 flow [2024-06-04 16:12:36,247 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 16:12:36,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:12:36,247 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 16:12:36,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-04 16:12:36,247 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:12:36,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:12:36,248 INFO L85 PathProgramCache]: Analyzing trace with hash 357340904, now seen corresponding path program 16 times [2024-06-04 16:12:36,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:12:36,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395986820] [2024-06-04 16:12:36,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:12:36,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:12:36,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:12:36,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:12:36,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:12:36,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395986820] [2024-06-04 16:12:36,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395986820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:12:36,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:12:36,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:12:36,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549007177] [2024-06-04 16:12:36,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:12:36,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:12:36,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:12:36,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:12:36,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:12:36,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:12:36,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 487 transitions, 8126 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 16:12:36,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:12:36,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:12:36,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:12:37,533 INFO L124 PetriNetUnfolderBase]: 3136/5395 cut-off events. [2024-06-04 16:12:37,533 INFO L125 PetriNetUnfolderBase]: For 701352/701352 co-relation queries the response was YES. [2024-06-04 16:12:37,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37015 conditions, 5395 events. 3136/5395 cut-off events. For 701352/701352 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 37013 event pairs, 653 based on Foata normal form. 10/5402 useless extension candidates. Maximal degree in co-relation 36827. Up to 4591 conditions per place. [2024-06-04 16:12:37,609 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 423 selfloop transitions, 84 changer transitions 0/514 dead transitions. [2024-06-04 16:12:37,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 514 transitions, 9224 flow [2024-06-04 16:12:37,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:12:37,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:12:37,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-04 16:12:37,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-04 16:12:37,610 INFO L175 Difference]: Start difference. First operand has 428 places, 487 transitions, 8126 flow. Second operand 7 states and 179 transitions. [2024-06-04 16:12:37,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 514 transitions, 9224 flow [2024-06-04 16:12:42,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 514 transitions, 9017 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-04 16:12:42,213 INFO L231 Difference]: Finished difference. Result has 429 places, 487 transitions, 8096 flow [2024-06-04 16:12:42,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7919, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8096, PETRI_PLACES=429, PETRI_TRANSITIONS=487} [2024-06-04 16:12:42,213 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 386 predicate places. [2024-06-04 16:12:42,213 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 487 transitions, 8096 flow [2024-06-04 16:12:42,213 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 16:12:42,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:12:42,214 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 16:12:42,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-04 16:12:42,214 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:12:42,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:12:42,214 INFO L85 PathProgramCache]: Analyzing trace with hash 366864104, now seen corresponding path program 17 times [2024-06-04 16:12:42,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:12:42,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198576944] [2024-06-04 16:12:42,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:12:42,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:12:42,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:12:42,423 INFO 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 16:12:42,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:12:42,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198576944] [2024-06-04 16:12:42,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198576944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:12:42,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:12:42,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:12:42,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384868111] [2024-06-04 16:12:42,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:12:42,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:12:42,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:12:42,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:12:42,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:12:42,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:12:42,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 487 transitions, 8096 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 16:12:42,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:12:42,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:12:42,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:12:43,424 INFO L124 PetriNetUnfolderBase]: 3106/5352 cut-off events. [2024-06-04 16:12:43,424 INFO L125 PetriNetUnfolderBase]: For 623642/623642 co-relation queries the response was YES. [2024-06-04 16:12:43,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35281 conditions, 5352 events. 3106/5352 cut-off events. For 623642/623642 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 36659 event pairs, 540 based on Foata normal form. 10/5359 useless extension candidates. Maximal degree in co-relation 35092. Up to 4016 conditions per place. [2024-06-04 16:12:43,499 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 414 selfloop transitions, 99 changer transitions 0/520 dead transitions. [2024-06-04 16:12:43,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 520 transitions, 9246 flow [2024-06-04 16:12:43,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:12:43,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:12:43,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-04 16:12:43,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-06-04 16:12:43,500 INFO L175 Difference]: Start difference. First operand has 429 places, 487 transitions, 8096 flow. Second operand 7 states and 184 transitions. [2024-06-04 16:12:43,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 520 transitions, 9246 flow [2024-06-04 16:12:48,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 520 transitions, 9007 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-04 16:12:48,580 INFO L231 Difference]: Finished difference. Result has 430 places, 487 transitions, 8066 flow [2024-06-04 16:12:48,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7857, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8066, PETRI_PLACES=430, PETRI_TRANSITIONS=487} [2024-06-04 16:12:48,581 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 387 predicate places. [2024-06-04 16:12:48,581 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 487 transitions, 8066 flow [2024-06-04 16:12:48,581 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 16:12:48,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:12:48,581 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 16:12:48,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-04 16:12:48,582 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:12:48,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:12:48,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1612494528, now seen corresponding path program 3 times [2024-06-04 16:12:48,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:12:48,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783116535] [2024-06-04 16:12:48,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:12:48,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:12:48,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:12:48,799 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 16:12:48,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:12:48,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783116535] [2024-06-04 16:12:48,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783116535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:12:48,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:12:48,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:12:48,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552077665] [2024-06-04 16:12:48,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:12:48,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:12:48,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:12:48,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:12:48,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:12:48,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:12:48,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 487 transitions, 8066 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 16:12:48,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:12:48,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:12:48,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:12:49,804 INFO L124 PetriNetUnfolderBase]: 3114/5373 cut-off events. [2024-06-04 16:12:49,805 INFO L125 PetriNetUnfolderBase]: For 563964/563964 co-relation queries the response was YES. [2024-06-04 16:12:49,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35365 conditions, 5373 events. 3114/5373 cut-off events. For 563964/563964 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 36855 event pairs, 630 based on Foata normal form. 2/5373 useless extension candidates. Maximal degree in co-relation 35176. Up to 4559 conditions per place. [2024-06-04 16:12:49,881 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 420 selfloop transitions, 94 changer transitions 1/522 dead transitions. [2024-06-04 16:12:49,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 522 transitions, 9260 flow [2024-06-04 16:12:49,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:12:49,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:12:49,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-04 16:12:49,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6101190476190477 [2024-06-04 16:12:49,882 INFO L175 Difference]: Start difference. First operand has 430 places, 487 transitions, 8066 flow. Second operand 8 states and 205 transitions. [2024-06-04 16:12:49,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 522 transitions, 9260 flow [2024-06-04 16:12:53,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 522 transitions, 8938 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-04 16:12:53,810 INFO L231 Difference]: Finished difference. Result has 430 places, 489 transitions, 8019 flow [2024-06-04 16:12:53,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7744, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8019, PETRI_PLACES=430, PETRI_TRANSITIONS=489} [2024-06-04 16:12:53,811 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 387 predicate places. [2024-06-04 16:12:53,811 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 489 transitions, 8019 flow [2024-06-04 16:12:53,811 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 16:12:53,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:12:53,811 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 16:12:53,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-04 16:12:53,811 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:12:53,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:12:53,811 INFO L85 PathProgramCache]: Analyzing trace with hash 2018614036, now seen corresponding path program 4 times [2024-06-04 16:12:53,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:12:53,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790039177] [2024-06-04 16:12:53,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:12:53,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:12:53,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:12:54,023 INFO 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 16:12:54,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:12:54,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790039177] [2024-06-04 16:12:54,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790039177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:12:54,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:12:54,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:12:54,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863222131] [2024-06-04 16:12:54,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:12:54,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:12:54,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:12:54,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:12:54,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:12:54,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:12:54,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 489 transitions, 8019 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 16:12:54,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:12:54,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:12:54,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:12:55,084 INFO L124 PetriNetUnfolderBase]: 3168/5449 cut-off events. [2024-06-04 16:12:55,084 INFO L125 PetriNetUnfolderBase]: For 628998/628998 co-relation queries the response was YES. [2024-06-04 16:12:55,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36806 conditions, 5449 events. 3168/5449 cut-off events. For 628998/628998 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 37382 event pairs, 521 based on Foata normal form. 2/5447 useless extension candidates. Maximal degree in co-relation 36616. Up to 3967 conditions per place. [2024-06-04 16:12:55,166 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 411 selfloop transitions, 115 changer transitions 1/534 dead transitions. [2024-06-04 16:12:55,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 534 transitions, 9631 flow [2024-06-04 16:12:55,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:12:55,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:12:55,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-04 16:12:55,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6279761904761905 [2024-06-04 16:12:55,167 INFO L175 Difference]: Start difference. First operand has 430 places, 489 transitions, 8019 flow. Second operand 8 states and 211 transitions. [2024-06-04 16:12:55,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 534 transitions, 9631 flow [2024-06-04 16:12:59,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 534 transitions, 9390 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-04 16:12:59,147 INFO L231 Difference]: Finished difference. Result has 433 places, 493 transitions, 8181 flow [2024-06-04 16:12:59,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7778, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8181, PETRI_PLACES=433, PETRI_TRANSITIONS=493} [2024-06-04 16:12:59,147 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 390 predicate places. [2024-06-04 16:12:59,147 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 493 transitions, 8181 flow [2024-06-04 16:12:59,147 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 16:12:59,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:12:59,147 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 16:12:59,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-04 16:12:59,147 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:12:59,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:12:59,148 INFO L85 PathProgramCache]: Analyzing trace with hash -2033454000, now seen corresponding path program 5 times [2024-06-04 16:12:59,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:12:59,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935482257] [2024-06-04 16:12:59,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:12:59,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:12:59,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:12:59,361 INFO 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 16:12:59,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:12:59,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935482257] [2024-06-04 16:12:59,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935482257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:12:59,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:12:59,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:12:59,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88764761] [2024-06-04 16:12:59,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:12:59,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:12:59,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:12:59,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:12:59,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:12:59,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:12:59,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 493 transitions, 8181 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 16:12:59,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:12:59,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:12:59,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:00,359 INFO L124 PetriNetUnfolderBase]: 3209/5520 cut-off events. [2024-06-04 16:13:00,360 INFO L125 PetriNetUnfolderBase]: For 701405/701405 co-relation queries the response was YES. [2024-06-04 16:13:00,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38914 conditions, 5520 events. 3209/5520 cut-off events. For 701405/701405 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 38060 event pairs, 668 based on Foata normal form. 2/5519 useless extension candidates. Maximal degree in co-relation 38722. Up to 4622 conditions per place. [2024-06-04 16:13:00,441 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 426 selfloop transitions, 89 changer transitions 0/522 dead transitions. [2024-06-04 16:13:00,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 522 transitions, 9708 flow [2024-06-04 16:13:00,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:13:00,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:13:00,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-04 16:13:00,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-04 16:13:00,442 INFO L175 Difference]: Start difference. First operand has 433 places, 493 transitions, 8181 flow. Second operand 7 states and 176 transitions. [2024-06-04 16:13:00,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 522 transitions, 9708 flow [2024-06-04 16:13:06,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 522 transitions, 9514 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-04 16:13:06,842 INFO L231 Difference]: Finished difference. Result has 437 places, 497 transitions, 8359 flow [2024-06-04 16:13:06,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7995, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8359, PETRI_PLACES=437, PETRI_TRANSITIONS=497} [2024-06-04 16:13:06,842 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 394 predicate places. [2024-06-04 16:13:06,842 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 497 transitions, 8359 flow [2024-06-04 16:13:06,842 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 16:13:06,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:06,842 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 16:13:06,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-04 16:13:06,842 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:06,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:06,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1629214984, now seen corresponding path program 6 times [2024-06-04 16:13:06,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:06,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286896234] [2024-06-04 16:13:06,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:06,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:06,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:07,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:07,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:07,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286896234] [2024-06-04 16:13:07,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286896234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:07,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:07,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:13:07,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469348639] [2024-06-04 16:13:07,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:07,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:13:07,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:07,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:13:07,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:13:07,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:13:07,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 497 transitions, 8359 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 16:13:07,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:07,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:13:07,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:08,173 INFO L124 PetriNetUnfolderBase]: 3204/5518 cut-off events. [2024-06-04 16:13:08,173 INFO L125 PetriNetUnfolderBase]: For 685046/685046 co-relation queries the response was YES. [2024-06-04 16:13:08,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38812 conditions, 5518 events. 3204/5518 cut-off events. For 685046/685046 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 38022 event pairs, 680 based on Foata normal form. 2/5517 useless extension candidates. Maximal degree in co-relation 38617. Up to 4745 conditions per place. [2024-06-04 16:13:08,250 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 430 selfloop transitions, 82 changer transitions 0/519 dead transitions. [2024-06-04 16:13:08,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 519 transitions, 9488 flow [2024-06-04 16:13:08,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:13:08,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:13:08,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-04 16:13:08,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5850340136054422 [2024-06-04 16:13:08,251 INFO L175 Difference]: Start difference. First operand has 437 places, 497 transitions, 8359 flow. Second operand 7 states and 172 transitions. [2024-06-04 16:13:08,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 519 transitions, 9488 flow [2024-06-04 16:13:12,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 519 transitions, 9314 flow, removed 40 selfloop flow, removed 3 redundant places. [2024-06-04 16:13:12,890 INFO L231 Difference]: Finished difference. Result has 441 places, 498 transitions, 8409 flow [2024-06-04 16:13:12,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8187, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8409, PETRI_PLACES=441, PETRI_TRANSITIONS=498} [2024-06-04 16:13:12,890 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 398 predicate places. [2024-06-04 16:13:12,891 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 498 transitions, 8409 flow [2024-06-04 16:13:12,891 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 16:13:12,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:12,891 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 16:13:12,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-04 16:13:12,891 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:12,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:12,891 INFO L85 PathProgramCache]: Analyzing trace with hash 160713024, now seen corresponding path program 7 times [2024-06-04 16:13:12,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:12,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779687158] [2024-06-04 16:13:12,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:12,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:12,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:13,109 INFO 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 16:13:13,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:13,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779687158] [2024-06-04 16:13:13,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779687158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:13,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:13,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:13:13,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928964525] [2024-06-04 16:13:13,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:13,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:13:13,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:13,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:13:13,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:13:13,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:13:13,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 498 transitions, 8409 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 16:13:13,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:13,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:13:13,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:14,285 INFO L124 PetriNetUnfolderBase]: 3379/5829 cut-off events. [2024-06-04 16:13:14,285 INFO L125 PetriNetUnfolderBase]: For 967719/967719 co-relation queries the response was YES. [2024-06-04 16:13:14,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44672 conditions, 5829 events. 3379/5829 cut-off events. For 967719/967719 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 40447 event pairs, 549 based on Foata normal form. 2/5828 useless extension candidates. Maximal degree in co-relation 44475. Up to 3483 conditions per place. [2024-06-04 16:13:14,374 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 419 selfloop transitions, 111 changer transitions 0/537 dead transitions. [2024-06-04 16:13:14,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 537 transitions, 10323 flow [2024-06-04 16:13:14,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:13:14,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:13:14,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-04 16:13:14,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6224489795918368 [2024-06-04 16:13:14,375 INFO L175 Difference]: Start difference. First operand has 441 places, 498 transitions, 8409 flow. Second operand 7 states and 183 transitions. [2024-06-04 16:13:14,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 537 transitions, 10323 flow [2024-06-04 16:13:19,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 537 transitions, 10096 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-04 16:13:19,594 INFO L231 Difference]: Finished difference. Result has 444 places, 505 transitions, 8693 flow [2024-06-04 16:13:19,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8182, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8693, PETRI_PLACES=444, PETRI_TRANSITIONS=505} [2024-06-04 16:13:19,594 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 401 predicate places. [2024-06-04 16:13:19,594 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 505 transitions, 8693 flow [2024-06-04 16:13:19,594 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 16:13:19,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:19,595 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, 1] [2024-06-04 16:13:19,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-04 16:13:19,595 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:19,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:19,595 INFO L85 PathProgramCache]: Analyzing trace with hash 154046784, now seen corresponding path program 8 times [2024-06-04 16:13:19,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:19,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830848436] [2024-06-04 16:13:19,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:19,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:19,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:19,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:19,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:19,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830848436] [2024-06-04 16:13:19,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830848436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:19,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:19,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:13:19,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430156208] [2024-06-04 16:13:19,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:19,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:13:19,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:19,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:13:19,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:13:19,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:13:19,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 505 transitions, 8693 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 16:13:19,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:19,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:13:19,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:21,008 INFO L124 PetriNetUnfolderBase]: 3374/5822 cut-off events. [2024-06-04 16:13:21,008 INFO L125 PetriNetUnfolderBase]: For 967548/967548 co-relation queries the response was YES. [2024-06-04 16:13:21,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45104 conditions, 5822 events. 3374/5822 cut-off events. For 967548/967548 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 40386 event pairs, 537 based on Foata normal form. 2/5821 useless extension candidates. Maximal degree in co-relation 44905. Up to 3481 conditions per place. [2024-06-04 16:13:21,097 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 419 selfloop transitions, 113 changer transitions 0/539 dead transitions. [2024-06-04 16:13:21,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 539 transitions, 10474 flow [2024-06-04 16:13:21,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:13:21,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:13:21,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-04 16:13:21,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-06-04 16:13:21,098 INFO L175 Difference]: Start difference. First operand has 444 places, 505 transitions, 8693 flow. Second operand 7 states and 184 transitions. [2024-06-04 16:13:21,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 539 transitions, 10474 flow [2024-06-04 16:13:26,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 539 transitions, 10244 flow, removed 47 selfloop flow, removed 3 redundant places. [2024-06-04 16:13:26,886 INFO L231 Difference]: Finished difference. Result has 448 places, 506 transitions, 8751 flow [2024-06-04 16:13:26,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8467, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8751, PETRI_PLACES=448, PETRI_TRANSITIONS=506} [2024-06-04 16:13:26,886 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 405 predicate places. [2024-06-04 16:13:26,886 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 506 transitions, 8751 flow [2024-06-04 16:13:26,886 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 16:13:26,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:26,887 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 16:13:26,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-04 16:13:26,887 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:26,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:26,887 INFO L85 PathProgramCache]: Analyzing trace with hash -803641798, now seen corresponding path program 1 times [2024-06-04 16:13:26,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:26,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576511755] [2024-06-04 16:13:26,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:26,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:26,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:27,117 INFO 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 16:13:27,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:27,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576511755] [2024-06-04 16:13:27,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576511755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:27,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:27,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:13:27,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766840895] [2024-06-04 16:13:27,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:27,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:13:27,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:27,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:13:27,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:13:27,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:13:27,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 506 transitions, 8751 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 16:13:27,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:27,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:13:27,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:28,395 INFO L124 PetriNetUnfolderBase]: 3454/5948 cut-off events. [2024-06-04 16:13:28,395 INFO L125 PetriNetUnfolderBase]: For 1097327/1097327 co-relation queries the response was YES. [2024-06-04 16:13:28,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48199 conditions, 5948 events. 3454/5948 cut-off events. For 1097327/1097327 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 41346 event pairs, 614 based on Foata normal form. 2/5935 useless extension candidates. Maximal degree in co-relation 47999. Up to 4667 conditions per place. [2024-06-04 16:13:28,490 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 496 selfloop transitions, 52 changer transitions 4/559 dead transitions. [2024-06-04 16:13:28,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 559 transitions, 10795 flow [2024-06-04 16:13:28,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:13:28,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:13:28,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 242 transitions. [2024-06-04 16:13:28,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5761904761904761 [2024-06-04 16:13:28,491 INFO L175 Difference]: Start difference. First operand has 448 places, 506 transitions, 8751 flow. Second operand 10 states and 242 transitions. [2024-06-04 16:13:28,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 559 transitions, 10795 flow [2024-06-04 16:13:35,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 559 transitions, 10390 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-04 16:13:35,319 INFO L231 Difference]: Finished difference. Result has 453 places, 511 transitions, 8662 flow [2024-06-04 16:13:35,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8346, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8662, PETRI_PLACES=453, PETRI_TRANSITIONS=511} [2024-06-04 16:13:35,319 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 410 predicate places. [2024-06-04 16:13:35,319 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 511 transitions, 8662 flow [2024-06-04 16:13:35,319 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 16:13:35,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:35,319 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 16:13:35,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-04 16:13:35,320 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:35,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:35,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1374578646, now seen corresponding path program 2 times [2024-06-04 16:13:35,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:35,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399635672] [2024-06-04 16:13:35,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:35,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:35,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:35,532 INFO 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 16:13:35,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:35,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399635672] [2024-06-04 16:13:35,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399635672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:35,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:35,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:13:35,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438325329] [2024-06-04 16:13:35,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:35,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:13:35,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:35,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:13:35,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:13:35,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:13:35,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 511 transitions, 8662 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 16:13:35,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:35,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:13:35,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:36,874 INFO L124 PetriNetUnfolderBase]: 3591/6197 cut-off events. [2024-06-04 16:13:36,875 INFO L125 PetriNetUnfolderBase]: For 1140058/1140058 co-relation queries the response was YES. [2024-06-04 16:13:36,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48951 conditions, 6197 events. 3591/6197 cut-off events. For 1140058/1140058 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 43374 event pairs, 675 based on Foata normal form. 2/6197 useless extension candidates. Maximal degree in co-relation 48751. Up to 5185 conditions per place. [2024-06-04 16:13:36,970 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 511 selfloop transitions, 35 changer transitions 6/559 dead transitions. [2024-06-04 16:13:36,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 559 transitions, 10245 flow [2024-06-04 16:13:36,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:13:36,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:13:36,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-04 16:13:36,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-06-04 16:13:36,971 INFO L175 Difference]: Start difference. First operand has 453 places, 511 transitions, 8662 flow. Second operand 8 states and 203 transitions. [2024-06-04 16:13:36,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 559 transitions, 10245 flow [2024-06-04 16:13:44,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 559 transitions, 10046 flow, removed 80 selfloop flow, removed 4 redundant places. [2024-06-04 16:13:44,641 INFO L231 Difference]: Finished difference. Result has 458 places, 514 transitions, 8612 flow [2024-06-04 16:13:44,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8471, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8612, PETRI_PLACES=458, PETRI_TRANSITIONS=514} [2024-06-04 16:13:44,642 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 415 predicate places. [2024-06-04 16:13:44,642 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 514 transitions, 8612 flow [2024-06-04 16:13:44,642 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 16:13:44,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:44,642 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 16:13:44,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-04 16:13:44,642 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:44,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:44,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1272645634, now seen corresponding path program 3 times [2024-06-04 16:13:44,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:44,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150558038] [2024-06-04 16:13:44,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:44,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:44,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:44,857 INFO 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 16:13:44,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:44,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150558038] [2024-06-04 16:13:44,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150558038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:44,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:44,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:13:44,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846853362] [2024-06-04 16:13:44,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:44,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:13:44,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:44,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:13:44,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:13:44,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:13:44,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 514 transitions, 8612 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 16:13:44,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:44,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:13:44,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:46,211 INFO L124 PetriNetUnfolderBase]: 3599/6207 cut-off events. [2024-06-04 16:13:46,211 INFO L125 PetriNetUnfolderBase]: For 1162105/1162105 co-relation queries the response was YES. [2024-06-04 16:13:46,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49075 conditions, 6207 events. 3599/6207 cut-off events. For 1162105/1162105 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 43398 event pairs, 860 based on Foata normal form. 2/6205 useless extension candidates. Maximal degree in co-relation 48872. Up to 5461 conditions per place. [2024-06-04 16:13:46,307 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 503 selfloop transitions, 45 changer transitions 2/557 dead transitions. [2024-06-04 16:13:46,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 557 transitions, 10258 flow [2024-06-04 16:13:46,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:13:46,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:13:46,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-04 16:13:46,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-04 16:13:46,308 INFO L175 Difference]: Start difference. First operand has 458 places, 514 transitions, 8612 flow. Second operand 9 states and 216 transitions. [2024-06-04 16:13:46,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 557 transitions, 10258 flow [2024-06-04 16:13:52,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 557 transitions, 10198 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-04 16:13:52,649 INFO L231 Difference]: Finished difference. Result has 462 places, 518 transitions, 8815 flow [2024-06-04 16:13:52,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8552, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8815, PETRI_PLACES=462, PETRI_TRANSITIONS=518} [2024-06-04 16:13:52,649 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 419 predicate places. [2024-06-04 16:13:52,649 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 518 transitions, 8815 flow [2024-06-04 16:13:52,649 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 16:13:52,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:52,649 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 16:13:52,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-04 16:13:52,650 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:52,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:52,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1617188616, now seen corresponding path program 4 times [2024-06-04 16:13:52,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:52,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226953510] [2024-06-04 16:13:52,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:52,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:52,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:52,859 INFO 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 16:13:52,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:52,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226953510] [2024-06-04 16:13:52,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226953510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:52,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:52,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:13:52,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067776729] [2024-06-04 16:13:52,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:52,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:13:52,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:52,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:13:52,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:13:52,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:13:52,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 518 transitions, 8815 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 16:13:52,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:52,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:13:52,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:54,194 INFO L124 PetriNetUnfolderBase]: 3594/6211 cut-off events. [2024-06-04 16:13:54,195 INFO L125 PetriNetUnfolderBase]: For 1159403/1159403 co-relation queries the response was YES. [2024-06-04 16:13:54,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48890 conditions, 6211 events. 3594/6211 cut-off events. For 1159403/1159403 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 43449 event pairs, 880 based on Foata normal form. 2/6211 useless extension candidates. Maximal degree in co-relation 48686. Up to 5513 conditions per place. [2024-06-04 16:13:54,290 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 502 selfloop transitions, 41 changer transitions 0/550 dead transitions. [2024-06-04 16:13:54,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 550 transitions, 9981 flow [2024-06-04 16:13:54,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:13:54,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:13:54,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-04 16:13:54,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5502645502645502 [2024-06-04 16:13:54,291 INFO L175 Difference]: Start difference. First operand has 462 places, 518 transitions, 8815 flow. Second operand 9 states and 208 transitions. [2024-06-04 16:13:54,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 550 transitions, 9981 flow [2024-06-04 16:13:59,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 550 transitions, 9780 flow, removed 69 selfloop flow, removed 6 redundant places. [2024-06-04 16:13:59,547 INFO L231 Difference]: Finished difference. Result has 465 places, 518 transitions, 8701 flow [2024-06-04 16:13:59,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8614, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8701, PETRI_PLACES=465, PETRI_TRANSITIONS=518} [2024-06-04 16:13:59,548 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 422 predicate places. [2024-06-04 16:13:59,548 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 518 transitions, 8701 flow [2024-06-04 16:13:59,548 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 16:13:59,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:59,548 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 16:13:59,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-04 16:13:59,549 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:59,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:59,549 INFO L85 PathProgramCache]: Analyzing trace with hash -175707085, now seen corresponding path program 1 times [2024-06-04 16:13:59,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:59,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689164183] [2024-06-04 16:13:59,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:59,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:59,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:59,747 INFO 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 16:13:59,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:59,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689164183] [2024-06-04 16:13:59,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689164183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:59,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:59,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:13:59,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300610477] [2024-06-04 16:13:59,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:59,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:13:59,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:59,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:13:59,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:13:59,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:13:59,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 518 transitions, 8701 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:59,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:59,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:13:59,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:01,059 INFO L124 PetriNetUnfolderBase]: 3591/6198 cut-off events. [2024-06-04 16:14:01,065 INFO L125 PetriNetUnfolderBase]: For 1153290/1153290 co-relation queries the response was YES. [2024-06-04 16:14:01,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48641 conditions, 6198 events. 3591/6198 cut-off events. For 1153290/1153290 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 43437 event pairs, 899 based on Foata normal form. 1/6196 useless extension candidates. Maximal degree in co-relation 48435. Up to 5263 conditions per place. [2024-06-04 16:14:01,174 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 398 selfloop transitions, 131 changer transitions 0/536 dead transitions. [2024-06-04 16:14:01,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 536 transitions, 10083 flow [2024-06-04 16:14:01,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:14:01,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:14:01,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-04 16:14:01,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-04 16:14:01,176 INFO L175 Difference]: Start difference. First operand has 465 places, 518 transitions, 8701 flow. Second operand 7 states and 173 transitions. [2024-06-04 16:14:01,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 536 transitions, 10083 flow [2024-06-04 16:14:06,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 536 transitions, 9981 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-04 16:14:06,445 INFO L231 Difference]: Finished difference. Result has 464 places, 518 transitions, 8875 flow [2024-06-04 16:14:06,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8599, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8875, PETRI_PLACES=464, PETRI_TRANSITIONS=518} [2024-06-04 16:14:06,445 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 421 predicate places. [2024-06-04 16:14:06,445 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 518 transitions, 8875 flow [2024-06-04 16:14:06,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:06,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:06,446 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 16:14:06,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-04 16:14:06,446 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:06,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:06,446 INFO L85 PathProgramCache]: Analyzing trace with hash 522785681, now seen corresponding path program 2 times [2024-06-04 16:14:06,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:06,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459350292] [2024-06-04 16:14:06,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:06,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:06,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:06,650 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 16:14:06,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:06,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459350292] [2024-06-04 16:14:06,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459350292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:06,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:06,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:14:06,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973122331] [2024-06-04 16:14:06,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:06,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:14:06,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:06,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:14:06,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:14:06,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:06,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 518 transitions, 8875 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 16:14:06,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:06,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:06,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:07,981 INFO L124 PetriNetUnfolderBase]: 3596/6207 cut-off events. [2024-06-04 16:14:07,981 INFO L125 PetriNetUnfolderBase]: For 1170615/1170615 co-relation queries the response was YES. [2024-06-04 16:14:08,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49050 conditions, 6207 events. 3596/6207 cut-off events. For 1170615/1170615 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 43523 event pairs, 899 based on Foata normal form. 1/6205 useless extension candidates. Maximal degree in co-relation 48843. Up to 5269 conditions per place. [2024-06-04 16:14:08,081 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 390 selfloop transitions, 146 changer transitions 0/543 dead transitions. [2024-06-04 16:14:08,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 543 transitions, 10327 flow [2024-06-04 16:14:08,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:14:08,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:14:08,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 255 transitions. [2024-06-04 16:14:08,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551948051948052 [2024-06-04 16:14:08,082 INFO L175 Difference]: Start difference. First operand has 464 places, 518 transitions, 8875 flow. Second operand 11 states and 255 transitions. [2024-06-04 16:14:08,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 543 transitions, 10327 flow [2024-06-04 16:14:15,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 543 transitions, 10042 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-04 16:14:15,578 INFO L231 Difference]: Finished difference. Result has 469 places, 521 transitions, 8941 flow [2024-06-04 16:14:15,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8598, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8941, PETRI_PLACES=469, PETRI_TRANSITIONS=521} [2024-06-04 16:14:15,579 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 426 predicate places. [2024-06-04 16:14:15,579 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 521 transitions, 8941 flow [2024-06-04 16:14:15,579 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 16:14:15,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:15,579 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 16:14:15,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-04 16:14:15,579 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:15,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:15,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1578181781, now seen corresponding path program 3 times [2024-06-04 16:14:15,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:15,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801099165] [2024-06-04 16:14:15,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:15,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:15,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:15,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:15,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:15,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801099165] [2024-06-04 16:14:15,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801099165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:15,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:15,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:14:15,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740574817] [2024-06-04 16:14:15,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:15,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:14:15,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:15,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:14:15,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:14:15,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:15,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 521 transitions, 8941 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 16:14:15,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:15,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:15,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:17,072 INFO L124 PetriNetUnfolderBase]: 3593/6203 cut-off events. [2024-06-04 16:14:17,072 INFO L125 PetriNetUnfolderBase]: For 1160373/1160373 co-relation queries the response was YES. [2024-06-04 16:14:17,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48918 conditions, 6203 events. 3593/6203 cut-off events. For 1160373/1160373 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 43440 event pairs, 899 based on Foata normal form. 1/6201 useless extension candidates. Maximal degree in co-relation 48711. Up to 5266 conditions per place. [2024-06-04 16:14:17,170 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 394 selfloop transitions, 139 changer transitions 0/540 dead transitions. [2024-06-04 16:14:17,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 540 transitions, 10053 flow [2024-06-04 16:14:17,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:14:17,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:14:17,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-04 16:14:17,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5661375661375662 [2024-06-04 16:14:17,171 INFO L175 Difference]: Start difference. First operand has 469 places, 521 transitions, 8941 flow. Second operand 9 states and 214 transitions. [2024-06-04 16:14:17,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 540 transitions, 10053 flow [2024-06-04 16:14:25,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 540 transitions, 9690 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-04 16:14:25,514 INFO L231 Difference]: Finished difference. Result has 468 places, 521 transitions, 8871 flow [2024-06-04 16:14:25,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8578, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8871, PETRI_PLACES=468, PETRI_TRANSITIONS=521} [2024-06-04 16:14:25,515 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 425 predicate places. [2024-06-04 16:14:25,515 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 521 transitions, 8871 flow [2024-06-04 16:14:25,515 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 16:14:25,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:25,515 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 16:14:25,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-04 16:14:25,516 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:25,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:25,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1549890328, now seen corresponding path program 5 times [2024-06-04 16:14:25,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:25,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777254010] [2024-06-04 16:14:25,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:25,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:25,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:25,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:25,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:25,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777254010] [2024-06-04 16:14:25,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777254010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:25,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:25,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:14:25,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913239728] [2024-06-04 16:14:25,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:25,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:14:25,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:25,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:14:25,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:14:25,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:25,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 521 transitions, 8871 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 16:14:25,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:25,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:25,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:27,103 INFO L124 PetriNetUnfolderBase]: 3614/6239 cut-off events. [2024-06-04 16:14:27,103 INFO L125 PetriNetUnfolderBase]: For 1192369/1192369 co-relation queries the response was YES. [2024-06-04 16:14:27,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49637 conditions, 6239 events. 3614/6239 cut-off events. For 1192369/1192369 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 43611 event pairs, 880 based on Foata normal form. 2/6239 useless extension candidates. Maximal degree in co-relation 49430. Up to 5328 conditions per place. [2024-06-04 16:14:27,197 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 410 selfloop transitions, 141 changer transitions 0/558 dead transitions. [2024-06-04 16:14:27,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 558 transitions, 10515 flow [2024-06-04 16:14:27,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:14:27,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:14:27,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 248 transitions. [2024-06-04 16:14:27,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5367965367965368 [2024-06-04 16:14:27,198 INFO L175 Difference]: Start difference. First operand has 468 places, 521 transitions, 8871 flow. Second operand 11 states and 248 transitions. [2024-06-04 16:14:27,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 558 transitions, 10515 flow [2024-06-04 16:14:33,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 558 transitions, 10224 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-04 16:14:33,260 INFO L231 Difference]: Finished difference. Result has 470 places, 525 transitions, 9053 flow [2024-06-04 16:14:33,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8582, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9053, PETRI_PLACES=470, PETRI_TRANSITIONS=525} [2024-06-04 16:14:33,261 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 427 predicate places. [2024-06-04 16:14:33,261 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 525 transitions, 9053 flow [2024-06-04 16:14:33,261 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 16:14:33,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:33,261 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 16:14:33,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-04 16:14:33,261 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:33,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:33,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1087519112, now seen corresponding path program 6 times [2024-06-04 16:14:33,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:33,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157408636] [2024-06-04 16:14:33,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:33,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:33,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:33,460 INFO 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 16:14:33,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:33,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157408636] [2024-06-04 16:14:33,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157408636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:33,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:33,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:14:33,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460085926] [2024-06-04 16:14:33,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:33,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:14:33,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:33,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:14:33,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:14:33,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:33,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 525 transitions, 9053 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 16:14:33,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:33,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:33,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:34,843 INFO L124 PetriNetUnfolderBase]: 3622/6256 cut-off events. [2024-06-04 16:14:34,843 INFO L125 PetriNetUnfolderBase]: For 1194756/1194756 co-relation queries the response was YES. [2024-06-04 16:14:34,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49878 conditions, 6256 events. 3622/6256 cut-off events. For 1194756/1194756 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 43815 event pairs, 887 based on Foata normal form. 2/6256 useless extension candidates. Maximal degree in co-relation 49671. Up to 5007 conditions per place. [2024-06-04 16:14:34,944 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 271 selfloop transitions, 279 changer transitions 0/557 dead transitions. [2024-06-04 16:14:34,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 557 transitions, 10601 flow [2024-06-04 16:14:34,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:14:34,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:14:34,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 270 transitions. [2024-06-04 16:14:34,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-04 16:14:34,945 INFO L175 Difference]: Start difference. First operand has 470 places, 525 transitions, 9053 flow. Second operand 12 states and 270 transitions. [2024-06-04 16:14:34,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 557 transitions, 10601 flow [2024-06-04 16:14:41,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 557 transitions, 10289 flow, removed 71 selfloop flow, removed 7 redundant places. [2024-06-04 16:14:41,365 INFO L231 Difference]: Finished difference. Result has 475 places, 527 transitions, 9402 flow [2024-06-04 16:14:41,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8769, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=277, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9402, PETRI_PLACES=475, PETRI_TRANSITIONS=527} [2024-06-04 16:14:41,365 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 432 predicate places. [2024-06-04 16:14:41,366 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 527 transitions, 9402 flow [2024-06-04 16:14:41,366 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 16:14:41,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:41,366 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 16:14:41,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-04 16:14:41,366 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:41,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:41,366 INFO L85 PathProgramCache]: Analyzing trace with hash 850943160, now seen corresponding path program 7 times [2024-06-04 16:14:41,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:41,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972459500] [2024-06-04 16:14:41,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:41,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:41,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:41,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:41,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:41,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972459500] [2024-06-04 16:14:41,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972459500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:41,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:41,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:14:41,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593140579] [2024-06-04 16:14:41,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:41,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:14:41,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:41,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:14:41,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:14:41,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:41,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 527 transitions, 9402 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 16:14:41,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:41,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:41,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:42,957 INFO L124 PetriNetUnfolderBase]: 3630/6268 cut-off events. [2024-06-04 16:14:42,958 INFO L125 PetriNetUnfolderBase]: For 1210755/1210755 co-relation queries the response was YES. [2024-06-04 16:14:43,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50513 conditions, 6268 events. 3630/6268 cut-off events. For 1210755/1210755 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 43895 event pairs, 887 based on Foata normal form. 2/6268 useless extension candidates. Maximal degree in co-relation 50304. Up to 5019 conditions per place. [2024-06-04 16:14:43,069 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 272 selfloop transitions, 276 changer transitions 0/555 dead transitions. [2024-06-04 16:14:43,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 555 transitions, 10914 flow [2024-06-04 16:14:43,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:14:43,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:14:43,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 249 transitions. [2024-06-04 16:14:43,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.538961038961039 [2024-06-04 16:14:43,070 INFO L175 Difference]: Start difference. First operand has 475 places, 527 transitions, 9402 flow. Second operand 11 states and 249 transitions. [2024-06-04 16:14:43,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 555 transitions, 10914 flow [2024-06-04 16:14:49,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 555 transitions, 10301 flow, removed 29 selfloop flow, removed 10 redundant places. [2024-06-04 16:14:49,879 INFO L231 Difference]: Finished difference. Result has 476 places, 529 transitions, 9420 flow [2024-06-04 16:14:49,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8789, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9420, PETRI_PLACES=476, PETRI_TRANSITIONS=529} [2024-06-04 16:14:49,880 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 433 predicate places. [2024-06-04 16:14:49,880 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 529 transitions, 9420 flow [2024-06-04 16:14:49,880 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 16:14:49,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:49,880 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 16:14:49,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-04 16:14:49,881 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:49,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:49,881 INFO L85 PathProgramCache]: Analyzing trace with hash -893564970, now seen corresponding path program 8 times [2024-06-04 16:14:49,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:49,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443868098] [2024-06-04 16:14:49,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:49,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:49,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:50,090 INFO 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 16:14:50,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:50,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443868098] [2024-06-04 16:14:50,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443868098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:50,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:50,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:14:50,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113046189] [2024-06-04 16:14:50,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:50,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:14:50,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:50,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:14:50,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:14:50,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:50,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 529 transitions, 9420 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 16:14:50,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:50,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:50,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:51,572 INFO L124 PetriNetUnfolderBase]: 3661/6311 cut-off events. [2024-06-04 16:14:51,572 INFO L125 PetriNetUnfolderBase]: For 1316701/1316701 co-relation queries the response was YES. [2024-06-04 16:14:51,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50940 conditions, 6311 events. 3661/6311 cut-off events. For 1316701/1316701 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 44212 event pairs, 878 based on Foata normal form. 12/6321 useless extension candidates. Maximal degree in co-relation 50730. Up to 5479 conditions per place. [2024-06-04 16:14:51,668 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 477 selfloop transitions, 81 changer transitions 0/565 dead transitions. [2024-06-04 16:14:51,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 565 transitions, 10734 flow [2024-06-04 16:14:51,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:14:51,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:14:51,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-04 16:14:51,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6011904761904762 [2024-06-04 16:14:51,669 INFO L175 Difference]: Start difference. First operand has 476 places, 529 transitions, 9420 flow. Second operand 8 states and 202 transitions. [2024-06-04 16:14:51,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 565 transitions, 10734 flow [2024-06-04 16:14:58,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 565 transitions, 10067 flow, removed 59 selfloop flow, removed 9 redundant places. [2024-06-04 16:14:58,451 INFO L231 Difference]: Finished difference. Result has 475 places, 531 transitions, 9025 flow [2024-06-04 16:14:58,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8753, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9025, PETRI_PLACES=475, PETRI_TRANSITIONS=531} [2024-06-04 16:14:58,452 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 432 predicate places. [2024-06-04 16:14:58,452 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 531 transitions, 9025 flow [2024-06-04 16:14:58,452 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 16:14:58,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:58,452 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, 1, 1] [2024-06-04 16:14:58,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-04 16:14:58,452 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:58,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:58,452 INFO L85 PathProgramCache]: Analyzing trace with hash -784624589, now seen corresponding path program 4 times [2024-06-04 16:14:58,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:58,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326189227] [2024-06-04 16:14:58,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:58,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:58,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:58,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:58,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:58,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326189227] [2024-06-04 16:14:58,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326189227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:58,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:58,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:14:58,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230415890] [2024-06-04 16:14:58,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:58,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:14:58,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:58,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:14:58,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:14:58,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:58,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 531 transitions, 9025 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 16:14:58,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:58,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:58,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:00,153 INFO L124 PetriNetUnfolderBase]: 3682/6328 cut-off events. [2024-06-04 16:15:00,154 INFO L125 PetriNetUnfolderBase]: For 1238293/1238293 co-relation queries the response was YES. [2024-06-04 16:15:00,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50902 conditions, 6328 events. 3682/6328 cut-off events. For 1238293/1238293 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 44317 event pairs, 928 based on Foata normal form. 1/6322 useless extension candidates. Maximal degree in co-relation 50691. Up to 5098 conditions per place. [2024-06-04 16:15:00,258 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 311 selfloop transitions, 249 changer transitions 0/567 dead transitions. [2024-06-04 16:15:00,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 567 transitions, 10915 flow [2024-06-04 16:15:00,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:15:00,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:15:00,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 264 transitions. [2024-06-04 16:15:00,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-04 16:15:00,259 INFO L175 Difference]: Start difference. First operand has 475 places, 531 transitions, 9025 flow. Second operand 12 states and 264 transitions. [2024-06-04 16:15:00,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 567 transitions, 10915 flow [2024-06-04 16:15:08,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 567 transitions, 10690 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-04 16:15:08,736 INFO L231 Difference]: Finished difference. Result has 482 places, 540 transitions, 9435 flow [2024-06-04 16:15:08,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8800, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9435, PETRI_PLACES=482, PETRI_TRANSITIONS=540} [2024-06-04 16:15:08,737 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 439 predicate places. [2024-06-04 16:15:08,737 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 540 transitions, 9435 flow [2024-06-04 16:15:08,737 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 16:15:08,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:08,737 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 16:15:08,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-04 16:15:08,737 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:08,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:08,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1224952265, now seen corresponding path program 5 times [2024-06-04 16:15:08,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:08,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606670515] [2024-06-04 16:15:08,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:08,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:08,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:08,928 INFO 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 16:15:08,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:08,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606670515] [2024-06-04 16:15:08,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606670515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:08,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:08,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:08,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314838334] [2024-06-04 16:15:08,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:08,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:08,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:08,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:08,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:08,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:08,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 540 transitions, 9435 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:08,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:08,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:08,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:10,374 INFO L124 PetriNetUnfolderBase]: 3687/6352 cut-off events. [2024-06-04 16:15:10,374 INFO L125 PetriNetUnfolderBase]: For 1248108/1248112 co-relation queries the response was YES. [2024-06-04 16:15:10,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50960 conditions, 6352 events. 3687/6352 cut-off events. For 1248108/1248112 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 44596 event pairs, 920 based on Foata normal form. 5/6354 useless extension candidates. Maximal degree in co-relation 50748. Up to 5502 conditions per place. [2024-06-04 16:15:10,473 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 465 selfloop transitions, 91 changer transitions 0/563 dead transitions. [2024-06-04 16:15:10,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 563 transitions, 10934 flow [2024-06-04 16:15:10,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:15:10,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:15:10,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-04 16:15:10,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317460317460317 [2024-06-04 16:15:10,474 INFO L175 Difference]: Start difference. First operand has 482 places, 540 transitions, 9435 flow. Second operand 9 states and 201 transitions. [2024-06-04 16:15:10,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 563 transitions, 10934 flow [2024-06-04 16:15:20,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 563 transitions, 10553 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-04 16:15:20,129 INFO L231 Difference]: Finished difference. Result has 483 places, 543 transitions, 9292 flow [2024-06-04 16:15:20,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9057, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9292, PETRI_PLACES=483, PETRI_TRANSITIONS=543} [2024-06-04 16:15:20,130 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 440 predicate places. [2024-06-04 16:15:20,130 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 543 transitions, 9292 flow [2024-06-04 16:15:20,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:20,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:20,130 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, 1] [2024-06-04 16:15:20,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-04 16:15:20,130 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:20,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:20,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1512750081, now seen corresponding path program 6 times [2024-06-04 16:15:20,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:20,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963923081] [2024-06-04 16:15:20,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:20,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:20,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:20,328 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 16:15:20,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:20,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963923081] [2024-06-04 16:15:20,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963923081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:20,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:20,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:15:20,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17008442] [2024-06-04 16:15:20,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:20,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:15:20,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:20,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:15:20,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:15:20,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:20,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 543 transitions, 9292 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 16:15:20,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:20,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:20,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:21,847 INFO L124 PetriNetUnfolderBase]: 3700/6353 cut-off events. [2024-06-04 16:15:21,847 INFO L125 PetriNetUnfolderBase]: For 1275408/1275408 co-relation queries the response was YES. [2024-06-04 16:15:21,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50883 conditions, 6353 events. 3700/6353 cut-off events. For 1275408/1275408 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 44491 event pairs, 936 based on Foata normal form. 1/6345 useless extension candidates. Maximal degree in co-relation 50670. Up to 5520 conditions per place. [2024-06-04 16:15:21,949 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 464 selfloop transitions, 101 changer transitions 0/572 dead transitions. [2024-06-04 16:15:21,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 572 transitions, 10830 flow [2024-06-04 16:15:21,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:15:21,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:15:21,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 255 transitions. [2024-06-04 16:15:21,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5059523809523809 [2024-06-04 16:15:21,950 INFO L175 Difference]: Start difference. First operand has 483 places, 543 transitions, 9292 flow. Second operand 12 states and 255 transitions. [2024-06-04 16:15:21,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 572 transitions, 10830 flow [2024-06-04 16:15:30,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 572 transitions, 10639 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-04 16:15:30,198 INFO L231 Difference]: Finished difference. Result has 489 places, 549 transitions, 9377 flow [2024-06-04 16:15:30,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9101, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9377, PETRI_PLACES=489, PETRI_TRANSITIONS=549} [2024-06-04 16:15:30,199 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 446 predicate places. [2024-06-04 16:15:30,199 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 549 transitions, 9377 flow [2024-06-04 16:15:30,199 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 16:15:30,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:30,199 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 16:15:30,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-04 16:15:30,200 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:30,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:30,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1541314333, now seen corresponding path program 7 times [2024-06-04 16:15:30,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:30,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168251614] [2024-06-04 16:15:30,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:30,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:30,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:30,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:30,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:30,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168251614] [2024-06-04 16:15:30,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168251614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:30,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:30,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:15:30,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822270608] [2024-06-04 16:15:30,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:30,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:15:30,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:30,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:15:30,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:15:30,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:30,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 549 transitions, 9377 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 16:15:30,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:30,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:30,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:31,864 INFO L124 PetriNetUnfolderBase]: 3697/6349 cut-off events. [2024-06-04 16:15:31,864 INFO L125 PetriNetUnfolderBase]: For 1280879/1280879 co-relation queries the response was YES. [2024-06-04 16:15:31,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50851 conditions, 6349 events. 3697/6349 cut-off events. For 1280879/1280879 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 44510 event pairs, 936 based on Foata normal form. 1/6341 useless extension candidates. Maximal degree in co-relation 50637. Up to 5116 conditions per place. [2024-06-04 16:15:31,962 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 306 selfloop transitions, 258 changer transitions 0/571 dead transitions. [2024-06-04 16:15:31,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 571 transitions, 10851 flow [2024-06-04 16:15:31,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:15:31,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:15:31,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 243 transitions. [2024-06-04 16:15:31,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525974025974026 [2024-06-04 16:15:31,963 INFO L175 Difference]: Start difference. First operand has 489 places, 549 transitions, 9377 flow. Second operand 11 states and 243 transitions. [2024-06-04 16:15:31,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 571 transitions, 10851 flow [2024-06-04 16:15:38,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 571 transitions, 10723 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-04 16:15:38,694 INFO L231 Difference]: Finished difference. Result has 492 places, 549 transitions, 9772 flow [2024-06-04 16:15:38,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9249, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=258, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9772, PETRI_PLACES=492, PETRI_TRANSITIONS=549} [2024-06-04 16:15:38,694 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 449 predicate places. [2024-06-04 16:15:38,694 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 549 transitions, 9772 flow [2024-06-04 16:15:38,695 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 16:15:38,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:38,695 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] [2024-06-04 16:15:38,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-04 16:15:38,695 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:38,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:38,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1437689881, now seen corresponding path program 8 times [2024-06-04 16:15:38,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:38,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110606064] [2024-06-04 16:15:38,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:38,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:38,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:38,886 INFO 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 16:15:38,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:38,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110606064] [2024-06-04 16:15:38,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110606064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:38,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:38,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:38,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359942044] [2024-06-04 16:15:38,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:38,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:38,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:38,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:38,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:38,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:38,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 549 transitions, 9772 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:38,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:38,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:38,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:40,315 INFO L124 PetriNetUnfolderBase]: 3702/6379 cut-off events. [2024-06-04 16:15:40,315 INFO L125 PetriNetUnfolderBase]: For 1299961/1299965 co-relation queries the response was YES. [2024-06-04 16:15:40,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51677 conditions, 6379 events. 3702/6379 cut-off events. For 1299961/1299965 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 44831 event pairs, 920 based on Foata normal form. 5/6381 useless extension candidates. Maximal degree in co-relation 51461. Up to 5522 conditions per place. [2024-06-04 16:15:40,420 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 468 selfloop transitions, 92 changer transitions 0/567 dead transitions. [2024-06-04 16:15:40,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 567 transitions, 11267 flow [2024-06-04 16:15:40,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:40,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:40,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-04 16:15:40,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5510204081632653 [2024-06-04 16:15:40,421 INFO L175 Difference]: Start difference. First operand has 492 places, 549 transitions, 9772 flow. Second operand 7 states and 162 transitions. [2024-06-04 16:15:40,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 567 transitions, 11267 flow [2024-06-04 16:15:49,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 567 transitions, 10831 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-04 16:15:49,525 INFO L231 Difference]: Finished difference. Result has 489 places, 552 transitions, 9571 flow [2024-06-04 16:15:49,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9339, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9571, PETRI_PLACES=489, PETRI_TRANSITIONS=552} [2024-06-04 16:15:49,525 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 446 predicate places. [2024-06-04 16:15:49,525 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 552 transitions, 9571 flow [2024-06-04 16:15:49,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:49,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:49,526 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 16:15:49,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-04 16:15:49,526 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:49,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:49,526 INFO L85 PathProgramCache]: Analyzing trace with hash 692040533, now seen corresponding path program 9 times [2024-06-04 16:15:49,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:49,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474260919] [2024-06-04 16:15:49,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:49,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:49,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:49,707 INFO 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 16:15:49,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:49,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474260919] [2024-06-04 16:15:49,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474260919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:49,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:49,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:49,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775366329] [2024-06-04 16:15:49,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:49,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:49,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:49,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:49,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:49,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:49,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 552 transitions, 9571 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:49,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:49,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:49,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:51,139 INFO L124 PetriNetUnfolderBase]: 3699/6375 cut-off events. [2024-06-04 16:15:51,139 INFO L125 PetriNetUnfolderBase]: For 1305063/1305067 co-relation queries the response was YES. [2024-06-04 16:15:51,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51023 conditions, 6375 events. 3699/6375 cut-off events. For 1305063/1305067 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 44832 event pairs, 920 based on Foata normal form. 5/6377 useless extension candidates. Maximal degree in co-relation 50807. Up to 5119 conditions per place. [2024-06-04 16:15:51,244 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 309 selfloop transitions, 253 changer transitions 0/569 dead transitions. [2024-06-04 16:15:51,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 569 transitions, 11033 flow [2024-06-04 16:15:51,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:15:51,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:15:51,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-04 16:15:51,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.544973544973545 [2024-06-04 16:15:51,245 INFO L175 Difference]: Start difference. First operand has 489 places, 552 transitions, 9571 flow. Second operand 9 states and 206 transitions. [2024-06-04 16:15:51,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 569 transitions, 11033 flow [2024-06-04 16:16:00,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 569 transitions, 10847 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-04 16:16:00,391 INFO L231 Difference]: Finished difference. Result has 493 places, 552 transitions, 9897 flow [2024-06-04 16:16:00,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9385, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9897, PETRI_PLACES=493, PETRI_TRANSITIONS=552} [2024-06-04 16:16:00,391 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 450 predicate places. [2024-06-04 16:16:00,391 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 552 transitions, 9897 flow [2024-06-04 16:16:00,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:00,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:00,392 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 16:16:00,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-04 16:16:00,392 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:16:00,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:00,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1826321551, now seen corresponding path program 10 times [2024-06-04 16:16:00,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:00,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882034096] [2024-06-04 16:16:00,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:00,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:00,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:00,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:00,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:00,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882034096] [2024-06-04 16:16:00,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882034096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:00,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:00,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:16:00,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954904508] [2024-06-04 16:16:00,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:00,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:16:00,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:00,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:16:00,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:16:00,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:16:00,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 552 transitions, 9897 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 16:16:00,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:00,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:16:00,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:02,049 INFO L124 PetriNetUnfolderBase]: 3712/6376 cut-off events. [2024-06-04 16:16:02,049 INFO L125 PetriNetUnfolderBase]: For 1337462/1337462 co-relation queries the response was YES. [2024-06-04 16:16:02,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51800 conditions, 6376 events. 3712/6376 cut-off events. For 1337462/1337462 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 44780 event pairs, 936 based on Foata normal form. 1/6368 useless extension candidates. Maximal degree in co-relation 51583. Up to 5429 conditions per place. [2024-06-04 16:16:02,151 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 402 selfloop transitions, 168 changer transitions 0/577 dead transitions. [2024-06-04 16:16:02,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 577 transitions, 11773 flow [2024-06-04 16:16:02,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:16:02,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:16:02,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-04 16:16:02,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-04 16:16:02,152 INFO L175 Difference]: Start difference. First operand has 493 places, 552 transitions, 9897 flow. Second operand 10 states and 225 transitions. [2024-06-04 16:16:02,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 577 transitions, 11773 flow [2024-06-04 16:16:10,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 577 transitions, 11316 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-04 16:16:10,534 INFO L231 Difference]: Finished difference. Result has 495 places, 558 transitions, 9874 flow [2024-06-04 16:16:10,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9446, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9874, PETRI_PLACES=495, PETRI_TRANSITIONS=558} [2024-06-04 16:16:10,535 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 452 predicate places. [2024-06-04 16:16:10,535 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 558 transitions, 9874 flow [2024-06-04 16:16:10,535 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 16:16:10,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:10,535 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 16:16:10,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-04 16:16:10,535 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:16:10,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:10,535 INFO L85 PathProgramCache]: Analyzing trace with hash -64268625, now seen corresponding path program 11 times [2024-06-04 16:16:10,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:10,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274216780] [2024-06-04 16:16:10,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:10,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:10,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:10,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:10,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:10,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274216780] [2024-06-04 16:16:10,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274216780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:10,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:10,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:16:10,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678009074] [2024-06-04 16:16:10,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:10,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:16:10,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:10,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:16:10,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:16:10,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:16:10,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 558 transitions, 9874 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 16:16:10,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:10,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:16:10,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:12,198 INFO L124 PetriNetUnfolderBase]: 3717/6385 cut-off events. [2024-06-04 16:16:12,198 INFO L125 PetriNetUnfolderBase]: For 1353511/1353511 co-relation queries the response was YES. [2024-06-04 16:16:12,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51747 conditions, 6385 events. 3717/6385 cut-off events. For 1353511/1353511 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 44751 event pairs, 936 based on Foata normal form. 1/6377 useless extension candidates. Maximal degree in co-relation 51529. Up to 5140 conditions per place. [2024-06-04 16:16:12,302 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 309 selfloop transitions, 267 changer transitions 0/583 dead transitions. [2024-06-04 16:16:12,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 583 transitions, 12025 flow [2024-06-04 16:16:12,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:16:12,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:16:12,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 262 transitions. [2024-06-04 16:16:12,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5198412698412699 [2024-06-04 16:16:12,303 INFO L175 Difference]: Start difference. First operand has 495 places, 558 transitions, 9874 flow. Second operand 12 states and 262 transitions. [2024-06-04 16:16:12,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 583 transitions, 12025 flow [2024-06-04 16:16:19,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 583 transitions, 11295 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-04 16:16:19,256 INFO L231 Difference]: Finished difference. Result has 497 places, 561 transitions, 9727 flow [2024-06-04 16:16:19,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9156, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=264, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9727, PETRI_PLACES=497, PETRI_TRANSITIONS=561} [2024-06-04 16:16:19,256 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 454 predicate places. [2024-06-04 16:16:19,256 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 561 transitions, 9727 flow [2024-06-04 16:16:19,256 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 16:16:19,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:19,256 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 16:16:19,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-04 16:16:19,256 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:16:19,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:19,257 INFO L85 PathProgramCache]: Analyzing trace with hash 564458419, now seen corresponding path program 12 times [2024-06-04 16:16:19,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:19,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703584525] [2024-06-04 16:16:19,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:19,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:19,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:19,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:19,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:19,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703584525] [2024-06-04 16:16:19,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703584525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:19,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:19,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:16:19,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766067602] [2024-06-04 16:16:19,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:19,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:16:19,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:19,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:16:19,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:16:19,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:16:19,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 561 transitions, 9727 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 16:16:19,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:19,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:16:19,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:20,959 INFO L124 PetriNetUnfolderBase]: 3714/6381 cut-off events. [2024-06-04 16:16:20,959 INFO L125 PetriNetUnfolderBase]: For 1356482/1356482 co-relation queries the response was YES. [2024-06-04 16:16:21,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51665 conditions, 6381 events. 3714/6381 cut-off events. For 1356482/1356482 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 44821 event pairs, 936 based on Foata normal form. 1/6373 useless extension candidates. Maximal degree in co-relation 51447. Up to 5137 conditions per place. [2024-06-04 16:16:21,068 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 309 selfloop transitions, 264 changer transitions 0/580 dead transitions. [2024-06-04 16:16:21,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 580 transitions, 11525 flow [2024-06-04 16:16:21,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:16:21,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:16:21,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-04 16:16:21,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-04 16:16:21,072 INFO L175 Difference]: Start difference. First operand has 497 places, 561 transitions, 9727 flow. Second operand 10 states and 225 transitions. [2024-06-04 16:16:21,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 580 transitions, 11525 flow [2024-06-04 16:16:31,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 580 transitions, 10836 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-04 16:16:31,341 INFO L231 Difference]: Finished difference. Result has 498 places, 561 transitions, 9574 flow [2024-06-04 16:16:31,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9038, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=264, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9574, PETRI_PLACES=498, PETRI_TRANSITIONS=561} [2024-06-04 16:16:31,341 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 455 predicate places. [2024-06-04 16:16:31,341 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 561 transitions, 9574 flow [2024-06-04 16:16:31,341 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 16:16:31,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:31,341 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 16:16:31,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-04 16:16:31,342 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:16:31,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:31,342 INFO L85 PathProgramCache]: Analyzing trace with hash 570887509, now seen corresponding path program 13 times [2024-06-04 16:16:31,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:31,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592249599] [2024-06-04 16:16:31,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:31,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:31,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:31,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:31,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:31,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592249599] [2024-06-04 16:16:31,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592249599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:31,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:31,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:16:31,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375367811] [2024-06-04 16:16:31,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:31,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:16:31,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:31,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:16:31,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:16:31,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:16:31,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 561 transitions, 9574 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 16:16:31,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:31,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:16:31,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:32,983 INFO L124 PetriNetUnfolderBase]: 3719/6390 cut-off events. [2024-06-04 16:16:32,983 INFO L125 PetriNetUnfolderBase]: For 1370648/1370648 co-relation queries the response was YES. [2024-06-04 16:16:33,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51742 conditions, 6390 events. 3719/6390 cut-off events. For 1370648/1370648 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 44925 event pairs, 936 based on Foata normal form. 1/6382 useless extension candidates. Maximal degree in co-relation 51523. Up to 5143 conditions per place. [2024-06-04 16:16:33,089 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 307 selfloop transitions, 270 changer transitions 0/584 dead transitions. [2024-06-04 16:16:33,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 584 transitions, 11736 flow [2024-06-04 16:16:33,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:16:33,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:16:33,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 228 transitions. [2024-06-04 16:16:33,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-06-04 16:16:33,090 INFO L175 Difference]: Start difference. First operand has 498 places, 561 transitions, 9574 flow. Second operand 10 states and 228 transitions. [2024-06-04 16:16:33,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 584 transitions, 11736 flow [2024-06-04 16:16:41,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 584 transitions, 11202 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-04 16:16:41,945 INFO L231 Difference]: Finished difference. Result has 499 places, 564 transitions, 9633 flow [2024-06-04 16:16:41,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9046, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9633, PETRI_PLACES=499, PETRI_TRANSITIONS=564} [2024-06-04 16:16:41,946 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 456 predicate places. [2024-06-04 16:16:41,946 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 564 transitions, 9633 flow [2024-06-04 16:16:41,946 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 16:16:41,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:41,946 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 16:16:41,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-04 16:16:41,946 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:16:41,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:41,946 INFO L85 PathProgramCache]: Analyzing trace with hash 571273459, now seen corresponding path program 14 times [2024-06-04 16:16:41,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:41,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187812168] [2024-06-04 16:16:41,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:41,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:41,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:42,137 INFO 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 16:16:42,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:42,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187812168] [2024-06-04 16:16:42,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187812168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:42,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:42,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:16:42,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048079597] [2024-06-04 16:16:42,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:42,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:16:42,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:42,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:16:42,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:16:42,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:16:42,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 564 transitions, 9633 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 16:16:42,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:42,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:16:42,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:43,609 INFO L124 PetriNetUnfolderBase]: 3716/6386 cut-off events. [2024-06-04 16:16:43,610 INFO L125 PetriNetUnfolderBase]: For 1376083/1376083 co-relation queries the response was YES. [2024-06-04 16:16:43,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51689 conditions, 6386 events. 3716/6386 cut-off events. For 1376083/1376083 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 44846 event pairs, 936 based on Foata normal form. 1/6378 useless extension candidates. Maximal degree in co-relation 51469. Up to 5140 conditions per place. [2024-06-04 16:16:43,717 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 299 selfloop transitions, 277 changer transitions 0/583 dead transitions. [2024-06-04 16:16:43,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 583 transitions, 11445 flow [2024-06-04 16:16:43,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:16:43,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:16:43,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 228 transitions. [2024-06-04 16:16:43,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-06-04 16:16:43,719 INFO L175 Difference]: Start difference. First operand has 499 places, 564 transitions, 9633 flow. Second operand 10 states and 228 transitions. [2024-06-04 16:16:43,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 583 transitions, 11445 flow [2024-06-04 16:16:52,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 583 transitions, 10825 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-04 16:16:52,340 INFO L231 Difference]: Finished difference. Result has 501 places, 564 transitions, 9573 flow [2024-06-04 16:16:52,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9013, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=277, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9573, PETRI_PLACES=501, PETRI_TRANSITIONS=564} [2024-06-04 16:16:52,340 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 458 predicate places. [2024-06-04 16:16:52,340 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 564 transitions, 9573 flow [2024-06-04 16:16:52,341 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 16:16:52,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:52,341 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 16:16:52,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-04 16:16:52,341 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:16:52,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:52,341 INFO L85 PathProgramCache]: Analyzing trace with hash 576428449, now seen corresponding path program 15 times [2024-06-04 16:16:52,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:52,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941198192] [2024-06-04 16:16:52,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:52,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:52,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:52,533 INFO 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 16:16:52,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:52,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941198192] [2024-06-04 16:16:52,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941198192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:52,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:52,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:16:52,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195452714] [2024-06-04 16:16:52,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:52,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:16:52,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:52,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:16:52,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:16:52,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:16:52,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 564 transitions, 9573 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 16:16:52,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:52,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:16:52,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:54,119 INFO L124 PetriNetUnfolderBase]: 3713/6382 cut-off events. [2024-06-04 16:16:54,119 INFO L125 PetriNetUnfolderBase]: For 1380711/1380711 co-relation queries the response was YES. [2024-06-04 16:16:54,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51429 conditions, 6382 events. 3713/6382 cut-off events. For 1380711/1380711 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 44833 event pairs, 936 based on Foata normal form. 1/6374 useless extension candidates. Maximal degree in co-relation 51209. Up to 5137 conditions per place. [2024-06-04 16:16:54,227 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 303 selfloop transitions, 272 changer transitions 0/582 dead transitions. [2024-06-04 16:16:54,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 582 transitions, 11075 flow [2024-06-04 16:16:54,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:16:54,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:16:54,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 224 transitions. [2024-06-04 16:16:54,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-04 16:16:54,228 INFO L175 Difference]: Start difference. First operand has 501 places, 564 transitions, 9573 flow. Second operand 10 states and 224 transitions. [2024-06-04 16:16:54,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 582 transitions, 11075 flow [2024-06-04 16:17:04,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 582 transitions, 10573 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-04 16:17:04,662 INFO L231 Difference]: Finished difference. Result has 502 places, 564 transitions, 9621 flow [2024-06-04 16:17:04,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9071, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=272, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9621, PETRI_PLACES=502, PETRI_TRANSITIONS=564} [2024-06-04 16:17:04,663 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 459 predicate places. [2024-06-04 16:17:04,663 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 564 transitions, 9621 flow [2024-06-04 16:17:04,663 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 16:17:04,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:04,663 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 16:17:04,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-04 16:17:04,663 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:17:04,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:04,663 INFO L85 PathProgramCache]: Analyzing trace with hash 153846099, now seen corresponding path program 16 times [2024-06-04 16:17:04,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:04,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844964136] [2024-06-04 16:17:04,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:04,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:04,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:04,848 INFO 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 16:17:04,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:04,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844964136] [2024-06-04 16:17:04,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844964136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:04,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:04,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:17:04,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576921302] [2024-06-04 16:17:04,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:04,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:17:04,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:04,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:17:04,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:17:04,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:17:04,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 564 transitions, 9621 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:04,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:04,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:17:04,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:06,263 INFO L124 PetriNetUnfolderBase]: 3726/6424 cut-off events. [2024-06-04 16:17:06,264 INFO L125 PetriNetUnfolderBase]: For 1410588/1410588 co-relation queries the response was YES. [2024-06-04 16:17:06,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51829 conditions, 6424 events. 3726/6424 cut-off events. For 1410588/1410588 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 45228 event pairs, 903 based on Foata normal form. 1/6422 useless extension candidates. Maximal degree in co-relation 51608. Up to 5417 conditions per place. [2024-06-04 16:17:06,369 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 437 selfloop transitions, 143 changer transitions 0/587 dead transitions. [2024-06-04 16:17:06,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 587 transitions, 11547 flow [2024-06-04 16:17:06,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:17:06,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:17:06,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-04 16:17:06,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-06-04 16:17:06,370 INFO L175 Difference]: Start difference. First operand has 502 places, 564 transitions, 9621 flow. Second operand 8 states and 186 transitions. [2024-06-04 16:17:06,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 587 transitions, 11547 flow [2024-06-04 16:17:16,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 587 transitions, 10957 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-04 16:17:16,072 INFO L231 Difference]: Finished difference. Result has 500 places, 570 transitions, 9425 flow [2024-06-04 16:17:16,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9043, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9425, PETRI_PLACES=500, PETRI_TRANSITIONS=570} [2024-06-04 16:17:16,072 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 457 predicate places. [2024-06-04 16:17:16,073 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 570 transitions, 9425 flow [2024-06-04 16:17:16,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:16,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:16,073 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 16:17:16,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-04 16:17:16,073 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:17:16,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:16,073 INFO L85 PathProgramCache]: Analyzing trace with hash -74088237, now seen corresponding path program 17 times [2024-06-04 16:17:16,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:16,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880942144] [2024-06-04 16:17:16,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:16,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:16,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:16,286 INFO 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 16:17:16,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:16,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880942144] [2024-06-04 16:17:16,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880942144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:16,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:16,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:17:16,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815121114] [2024-06-04 16:17:16,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:16,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:17:16,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:16,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:17:16,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:17:16,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:17:16,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 570 transitions, 9425 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 16:17:16,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:16,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:17:16,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:17,783 INFO L124 PetriNetUnfolderBase]: 3731/6433 cut-off events. [2024-06-04 16:17:17,783 INFO L125 PetriNetUnfolderBase]: For 1425877/1425877 co-relation queries the response was YES. [2024-06-04 16:17:17,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51623 conditions, 6433 events. 3731/6433 cut-off events. For 1425877/1425877 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 45355 event pairs, 903 based on Foata normal form. 1/6431 useless extension candidates. Maximal degree in co-relation 51401. Up to 5423 conditions per place. [2024-06-04 16:17:17,891 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 440 selfloop transitions, 143 changer transitions 0/590 dead transitions. [2024-06-04 16:17:17,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 590 transitions, 10991 flow [2024-06-04 16:17:17,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:17:17,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:17:17,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-04 16:17:17,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5343915343915344 [2024-06-04 16:17:17,892 INFO L175 Difference]: Start difference. First operand has 500 places, 570 transitions, 9425 flow. Second operand 9 states and 202 transitions. [2024-06-04 16:17:17,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 590 transitions, 10991 flow [2024-06-04 16:17:27,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 590 transitions, 10748 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-04 16:17:27,726 INFO L231 Difference]: Finished difference. Result has 505 places, 573 transitions, 9520 flow [2024-06-04 16:17:27,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9185, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9520, PETRI_PLACES=505, PETRI_TRANSITIONS=573} [2024-06-04 16:17:27,726 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 462 predicate places. [2024-06-04 16:17:27,726 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 573 transitions, 9520 flow [2024-06-04 16:17:27,726 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 16:17:27,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:27,727 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 16:17:27,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-04 16:17:27,727 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:17:27,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:27,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1923338877, now seen corresponding path program 18 times [2024-06-04 16:17:27,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:27,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334341066] [2024-06-04 16:17:27,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:27,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:27,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:27,925 INFO 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 16:17:27,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:27,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334341066] [2024-06-04 16:17:27,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334341066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:27,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:27,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:17:27,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521788656] [2024-06-04 16:17:27,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:27,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:17:27,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:27,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:17:27,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:17:27,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:17:27,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 573 transitions, 9520 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 16:17:27,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:27,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:17:27,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:29,484 INFO L124 PetriNetUnfolderBase]: 3736/6442 cut-off events. [2024-06-04 16:17:29,484 INFO L125 PetriNetUnfolderBase]: For 1443746/1443746 co-relation queries the response was YES. [2024-06-04 16:17:29,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51813 conditions, 6442 events. 3736/6442 cut-off events. For 1443746/1443746 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 45441 event pairs, 905 based on Foata normal form. 1/6440 useless extension candidates. Maximal degree in co-relation 51590. Up to 5429 conditions per place. [2024-06-04 16:17:29,588 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 445 selfloop transitions, 143 changer transitions 0/595 dead transitions. [2024-06-04 16:17:29,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 595 transitions, 11107 flow [2024-06-04 16:17:29,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:17:29,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:17:29,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-04 16:17:29,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-04 16:17:29,589 INFO L175 Difference]: Start difference. First operand has 505 places, 573 transitions, 9520 flow. Second operand 8 states and 188 transitions. [2024-06-04 16:17:29,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 595 transitions, 11107 flow [2024-06-04 16:17:40,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 595 transitions, 10816 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-04 16:17:40,014 INFO L231 Difference]: Finished difference. Result has 507 places, 576 transitions, 9570 flow [2024-06-04 16:17:40,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9235, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9570, PETRI_PLACES=507, PETRI_TRANSITIONS=576} [2024-06-04 16:17:40,014 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 464 predicate places. [2024-06-04 16:17:40,014 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 576 transitions, 9570 flow [2024-06-04 16:17:40,014 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 16:17:40,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:40,014 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 16:17:40,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-04 16:17:40,014 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:17:40,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:40,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1928879817, now seen corresponding path program 19 times [2024-06-04 16:17:40,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:40,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004036078] [2024-06-04 16:17:40,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:40,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:40,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:40,205 INFO 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 16:17:40,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:40,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004036078] [2024-06-04 16:17:40,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004036078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:40,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:40,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:17:40,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379779137] [2024-06-04 16:17:40,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:40,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:17:40,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:40,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:17:40,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:17:40,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:17:40,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 576 transitions, 9570 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:40,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:40,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:17:40,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:41,756 INFO L124 PetriNetUnfolderBase]: 3741/6451 cut-off events. [2024-06-04 16:17:41,756 INFO L125 PetriNetUnfolderBase]: For 1461222/1461222 co-relation queries the response was YES. [2024-06-04 16:17:41,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51999 conditions, 6451 events. 3741/6451 cut-off events. For 1461222/1461222 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 45526 event pairs, 905 based on Foata normal form. 1/6449 useless extension candidates. Maximal degree in co-relation 51775. Up to 5435 conditions per place. [2024-06-04 16:17:41,865 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 444 selfloop transitions, 150 changer transitions 0/601 dead transitions. [2024-06-04 16:17:41,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 601 transitions, 11507 flow [2024-06-04 16:17:41,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:17:41,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:17:41,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-04 16:17:41,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5918367346938775 [2024-06-04 16:17:41,865 INFO L175 Difference]: Start difference. First operand has 507 places, 576 transitions, 9570 flow. Second operand 7 states and 174 transitions. [2024-06-04 16:17:41,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 513 places, 601 transitions, 11507 flow [2024-06-04 16:17:52,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 601 transitions, 11307 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-04 16:17:52,024 INFO L231 Difference]: Finished difference. Result has 509 places, 579 transitions, 9738 flow [2024-06-04 16:17:52,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9373, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9738, PETRI_PLACES=509, PETRI_TRANSITIONS=579} [2024-06-04 16:17:52,024 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 466 predicate places. [2024-06-04 16:17:52,024 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 579 transitions, 9738 flow [2024-06-04 16:17:52,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:52,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:52,025 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 16:17:52,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-04 16:17:52,025 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:17:52,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:52,025 INFO L85 PathProgramCache]: Analyzing trace with hash -273182637, now seen corresponding path program 20 times [2024-06-04 16:17:52,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:52,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364288904] [2024-06-04 16:17:52,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:52,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:52,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:52,214 INFO 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 16:17:52,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:52,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364288904] [2024-06-04 16:17:52,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364288904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:52,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:52,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:17:52,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297757019] [2024-06-04 16:17:52,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:52,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:17:52,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:52,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:17:52,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:17:52,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:17:52,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 579 transitions, 9738 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:52,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:52,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:17:52,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:53,804 INFO L124 PetriNetUnfolderBase]: 3738/6447 cut-off events. [2024-06-04 16:17:53,804 INFO L125 PetriNetUnfolderBase]: For 1468238/1468238 co-relation queries the response was YES. [2024-06-04 16:17:53,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52016 conditions, 6447 events. 3738/6447 cut-off events. For 1468238/1468238 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 45443 event pairs, 905 based on Foata normal form. 1/6445 useless extension candidates. Maximal degree in co-relation 51791. Up to 5432 conditions per place. [2024-06-04 16:17:53,911 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 440 selfloop transitions, 151 changer transitions 0/598 dead transitions. [2024-06-04 16:17:53,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 598 transitions, 11606 flow [2024-06-04 16:17:53,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:17:53,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:17:53,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-04 16:17:53,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5816326530612245 [2024-06-04 16:17:53,912 INFO L175 Difference]: Start difference. First operand has 509 places, 579 transitions, 9738 flow. Second operand 7 states and 171 transitions. [2024-06-04 16:17:53,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 598 transitions, 11606 flow [2024-06-04 16:18:05,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 598 transitions, 11379 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-04 16:18:05,375 INFO L231 Difference]: Finished difference. Result has 512 places, 579 transitions, 9819 flow [2024-06-04 16:18:05,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9511, PETRI_DIFFERENCE_MINUEND_PLACES=505, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9819, PETRI_PLACES=512, PETRI_TRANSITIONS=579} [2024-06-04 16:18:05,376 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 469 predicate places. [2024-06-04 16:18:05,376 INFO L495 AbstractCegarLoop]: Abstraction has has 512 places, 579 transitions, 9819 flow [2024-06-04 16:18:05,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:05,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:05,376 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 16:18:05,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-04 16:18:05,376 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:18:05,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:05,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1935308907, now seen corresponding path program 21 times [2024-06-04 16:18:05,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:05,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241970816] [2024-06-04 16:18:05,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:05,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:05,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:05,586 INFO 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 16:18:05,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:05,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241970816] [2024-06-04 16:18:05,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241970816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:05,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:05,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:18:05,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774258879] [2024-06-04 16:18:05,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:05,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:18:05,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:05,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:18:05,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:18:05,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:18:05,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 579 transitions, 9819 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 16:18:05,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:05,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:18:05,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:07,036 INFO L124 PetriNetUnfolderBase]: 3735/6443 cut-off events. [2024-06-04 16:18:07,036 INFO L125 PetriNetUnfolderBase]: For 1474676/1474676 co-relation queries the response was YES. [2024-06-04 16:18:07,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51984 conditions, 6443 events. 3735/6443 cut-off events. For 1474676/1474676 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 45447 event pairs, 905 based on Foata normal form. 1/6441 useless extension candidates. Maximal degree in co-relation 51759. Up to 5429 conditions per place. [2024-06-04 16:18:07,145 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 450 selfloop transitions, 147 changer transitions 0/604 dead transitions. [2024-06-04 16:18:07,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 604 transitions, 11397 flow [2024-06-04 16:18:07,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:18:07,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:18:07,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-04 16:18:07,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-04 16:18:07,148 INFO L175 Difference]: Start difference. First operand has 512 places, 579 transitions, 9819 flow. Second operand 8 states and 196 transitions. [2024-06-04 16:18:07,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 604 transitions, 11397 flow [2024-06-04 16:18:18,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 604 transitions, 10663 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-04 16:18:18,576 INFO L231 Difference]: Finished difference. Result has 511 places, 579 transitions, 9387 flow [2024-06-04 16:18:18,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9085, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9387, PETRI_PLACES=511, PETRI_TRANSITIONS=579} [2024-06-04 16:18:18,576 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 468 predicate places. [2024-06-04 16:18:18,576 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 579 transitions, 9387 flow [2024-06-04 16:18:18,577 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 16:18:18,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:18,577 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 16:18:18,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-04 16:18:18,577 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:18:18,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:18,577 INFO L85 PathProgramCache]: Analyzing trace with hash -223611281, now seen corresponding path program 22 times [2024-06-04 16:18:18,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:18,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885017546] [2024-06-04 16:18:18,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:18,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:18,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:18,773 INFO 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 16:18:18,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:18,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885017546] [2024-06-04 16:18:18,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885017546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:18,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:18,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:18:18,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156297368] [2024-06-04 16:18:18,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:18,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:18:18,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:18,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:18:18,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:18:18,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:18:18,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 579 transitions, 9387 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 16:18:18,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:18,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:18:18,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:20,263 INFO L124 PetriNetUnfolderBase]: 3732/6439 cut-off events. [2024-06-04 16:18:20,264 INFO L125 PetriNetUnfolderBase]: For 1471769/1471769 co-relation queries the response was YES. [2024-06-04 16:18:20,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51631 conditions, 6439 events. 3732/6439 cut-off events. For 1471769/1471769 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 45439 event pairs, 905 based on Foata normal form. 1/6437 useless extension candidates. Maximal degree in co-relation 51405. Up to 5426 conditions per place. [2024-06-04 16:18:20,371 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 448 selfloop transitions, 150 changer transitions 0/605 dead transitions. [2024-06-04 16:18:20,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 605 transitions, 10647 flow [2024-06-04 16:18:20,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:18:20,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:18:20,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 231 transitions. [2024-06-04 16:18:20,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-04 16:18:20,372 INFO L175 Difference]: Start difference. First operand has 511 places, 579 transitions, 9387 flow. Second operand 10 states and 231 transitions. [2024-06-04 16:18:20,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 605 transitions, 10647 flow [2024-06-04 16:18:31,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 605 transitions, 10291 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-04 16:18:31,416 INFO L231 Difference]: Finished difference. Result has 514 places, 579 transitions, 9337 flow [2024-06-04 16:18:31,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9031, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9337, PETRI_PLACES=514, PETRI_TRANSITIONS=579} [2024-06-04 16:18:31,417 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 471 predicate places. [2024-06-04 16:18:31,417 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 579 transitions, 9337 flow [2024-06-04 16:18:31,417 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 16:18:31,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:31,417 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 16:18:31,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-04 16:18:31,417 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:18:31,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:31,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1406324778, now seen corresponding path program 9 times [2024-06-04 16:18:31,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:31,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856875791] [2024-06-04 16:18:31,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:31,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:31,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:31,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:18:31,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:31,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856875791] [2024-06-04 16:18:31,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856875791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:31,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:31,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:18:31,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875839598] [2024-06-04 16:18:31,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:31,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:18:31,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:31,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:18:31,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:18:31,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:18:31,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 579 transitions, 9337 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 16:18:31,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:31,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:18:31,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:33,583 INFO L124 PetriNetUnfolderBase]: 3786/6496 cut-off events. [2024-06-04 16:18:33,583 INFO L125 PetriNetUnfolderBase]: For 1620797/1620797 co-relation queries the response was YES. [2024-06-04 16:18:33,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54099 conditions, 6496 events. 3786/6496 cut-off events. For 1620797/1620797 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 45741 event pairs, 941 based on Foata normal form. 2/6489 useless extension candidates. Maximal degree in co-relation 53872. Up to 5148 conditions per place. [2024-06-04 16:18:33,683 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 312 selfloop transitions, 298 changer transitions 0/617 dead transitions. [2024-06-04 16:18:33,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 617 transitions, 11179 flow [2024-06-04 16:18:33,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:18:33,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:18:33,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 270 transitions. [2024-06-04 16:18:33,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-04 16:18:33,684 INFO L175 Difference]: Start difference. First operand has 514 places, 579 transitions, 9337 flow. Second operand 12 states and 270 transitions. [2024-06-04 16:18:33,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 617 transitions, 11179 flow [2024-06-04 16:18:46,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 617 transitions, 10689 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-04 16:18:46,366 INFO L231 Difference]: Finished difference. Result has 514 places, 583 transitions, 9648 flow [2024-06-04 16:18:46,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8847, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=296, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9648, PETRI_PLACES=514, PETRI_TRANSITIONS=583} [2024-06-04 16:18:46,366 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 471 predicate places. [2024-06-04 16:18:46,366 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 583 transitions, 9648 flow [2024-06-04 16:18:46,366 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 16:18:46,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:46,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:18:46,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-04 16:18:46,367 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:18:46,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:46,367 INFO L85 PathProgramCache]: Analyzing trace with hash -19416826, now seen corresponding path program 10 times [2024-06-04 16:18:46,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:46,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162820812] [2024-06-04 16:18:46,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:46,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:46,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:46,565 INFO 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 16:18:46,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:46,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162820812] [2024-06-04 16:18:46,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162820812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:46,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:46,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:18:46,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554124478] [2024-06-04 16:18:46,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:46,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:18:46,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:46,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:18:46,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:18:46,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:18:46,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 583 transitions, 9648 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 16:18:46,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:46,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:18:46,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:48,539 INFO L124 PetriNetUnfolderBase]: 3794/6513 cut-off events. [2024-06-04 16:18:48,540 INFO L125 PetriNetUnfolderBase]: For 1640184/1640184 co-relation queries the response was YES. [2024-06-04 16:18:48,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54737 conditions, 6513 events. 3794/6513 cut-off events. For 1640184/1640184 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 45840 event pairs, 948 based on Foata normal form. 2/6506 useless extension candidates. Maximal degree in co-relation 54509. Up to 5249 conditions per place. [2024-06-04 16:18:48,640 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 310 selfloop transitions, 294 changer transitions 0/611 dead transitions. [2024-06-04 16:18:48,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 611 transitions, 11020 flow [2024-06-04 16:18:48,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:18:48,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:18:48,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 262 transitions. [2024-06-04 16:18:48,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5198412698412699 [2024-06-04 16:18:48,641 INFO L175 Difference]: Start difference. First operand has 514 places, 583 transitions, 9648 flow. Second operand 12 states and 262 transitions. [2024-06-04 16:18:48,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 611 transitions, 11020 flow [2024-06-04 16:19:00,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 516 places, 611 transitions, 10288 flow, removed 74 selfloop flow, removed 9 redundant places. [2024-06-04 16:19:00,049 INFO L231 Difference]: Finished difference. Result has 517 places, 585 transitions, 9615 flow [2024-06-04 16:19:00,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8942, PETRI_DIFFERENCE_MINUEND_PLACES=505, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=292, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9615, PETRI_PLACES=517, PETRI_TRANSITIONS=585} [2024-06-04 16:19:00,049 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 474 predicate places. [2024-06-04 16:19:00,049 INFO L495 AbstractCegarLoop]: Abstraction has has 517 places, 585 transitions, 9615 flow [2024-06-04 16:19:00,049 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 16:19:00,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:19:00,049 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 16:19:00,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-04 16:19:00,049 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:19:00,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:19:00,050 INFO L85 PathProgramCache]: Analyzing trace with hash 79286230, now seen corresponding path program 11 times [2024-06-04 16:19:00,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:19:00,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471882041] [2024-06-04 16:19:00,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:19:00,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:19:00,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:19:00,250 INFO 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 16:19:00,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:19:00,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471882041] [2024-06-04 16:19:00,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471882041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:19:00,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:19:00,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:19:00,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744111274] [2024-06-04 16:19:00,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:19:00,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:19:00,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:19:00,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:19:00,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:19:00,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:19:00,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 517 places, 585 transitions, 9615 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 16:19:00,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:19:00,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:19:00,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:19:02,092 INFO L124 PetriNetUnfolderBase]: 3802/6525 cut-off events. [2024-06-04 16:19:02,092 INFO L125 PetriNetUnfolderBase]: For 1654508/1654508 co-relation queries the response was YES. [2024-06-04 16:19:02,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54618 conditions, 6525 events. 3802/6525 cut-off events. For 1654508/1654508 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 45943 event pairs, 948 based on Foata normal form. 2/6518 useless extension candidates. Maximal degree in co-relation 54389. Up to 5261 conditions per place. [2024-06-04 16:19:02,285 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 311 selfloop transitions, 291 changer transitions 0/609 dead transitions. [2024-06-04 16:19:02,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 609 transitions, 10951 flow [2024-06-04 16:19:02,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:19:02,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:19:02,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 243 transitions. [2024-06-04 16:19:02,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525974025974026 [2024-06-04 16:19:02,287 INFO L175 Difference]: Start difference. First operand has 517 places, 585 transitions, 9615 flow. Second operand 11 states and 243 transitions. [2024-06-04 16:19:02,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 609 transitions, 10951 flow [2024-06-04 16:19:13,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 609 transitions, 10298 flow, removed 34 selfloop flow, removed 10 redundant places. [2024-06-04 16:19:13,503 INFO L231 Difference]: Finished difference. Result has 518 places, 587 transitions, 9633 flow [2024-06-04 16:19:13,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8962, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=289, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9633, PETRI_PLACES=518, PETRI_TRANSITIONS=587} [2024-06-04 16:19:13,504 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 475 predicate places. [2024-06-04 16:19:13,504 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 587 transitions, 9633 flow [2024-06-04 16:19:13,504 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 16:19:13,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:19:13,504 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 16:19:13,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-04 16:19:13,505 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:19:13,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:19:13,505 INFO L85 PathProgramCache]: Analyzing trace with hash 214087638, now seen corresponding path program 12 times [2024-06-04 16:19:13,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:19:13,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805553439] [2024-06-04 16:19:13,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:19:13,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:19:13,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:19:13,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:19:13,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:19:13,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805553439] [2024-06-04 16:19:13,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805553439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:19:13,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:19:13,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:19:13,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152156224] [2024-06-04 16:19:13,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:19:13,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:19:13,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:19:13,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:19:13,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:19:13,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:19:13,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 587 transitions, 9633 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 16:19:13,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:19:13,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:19:13,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:19:15,572 INFO L124 PetriNetUnfolderBase]: 3838/6581 cut-off events. [2024-06-04 16:19:15,572 INFO L125 PetriNetUnfolderBase]: For 1791933/1791933 co-relation queries the response was YES. [2024-06-04 16:19:15,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55390 conditions, 6581 events. 3838/6581 cut-off events. For 1791933/1791933 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 46316 event pairs, 952 based on Foata normal form. 10/6582 useless extension candidates. Maximal degree in co-relation 55160. Up to 5285 conditions per place. [2024-06-04 16:19:15,680 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 321 selfloop transitions, 282 changer transitions 0/610 dead transitions. [2024-06-04 16:19:15,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 610 transitions, 10991 flow [2024-06-04 16:19:15,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:19:15,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:19:15,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 226 transitions. [2024-06-04 16:19:15,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5380952380952381 [2024-06-04 16:19:15,681 INFO L175 Difference]: Start difference. First operand has 518 places, 587 transitions, 9633 flow. Second operand 10 states and 226 transitions. [2024-06-04 16:19:15,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 610 transitions, 10991 flow [2024-06-04 16:19:28,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 610 transitions, 10340 flow, removed 36 selfloop flow, removed 9 redundant places. [2024-06-04 16:19:28,123 INFO L231 Difference]: Finished difference. Result has 519 places, 589 transitions, 9640 flow [2024-06-04 16:19:28,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8982, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=280, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9640, PETRI_PLACES=519, PETRI_TRANSITIONS=589} [2024-06-04 16:19:28,124 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 476 predicate places. [2024-06-04 16:19:28,124 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 589 transitions, 9640 flow [2024-06-04 16:19:28,124 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 16:19:28,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:19:28,124 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 16:19:28,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-04 16:19:28,124 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:19:28,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:19:28,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1526065110, now seen corresponding path program 13 times [2024-06-04 16:19:28,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:19:28,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69505660] [2024-06-04 16:19:28,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:19:28,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:19:28,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:19:28,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:19:28,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:19:28,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69505660] [2024-06-04 16:19:28,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69505660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:19:28,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:19:28,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:19:28,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513068949] [2024-06-04 16:19:28,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:19:28,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:19:28,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:19:28,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:19:28,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:19:28,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:19:28,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 589 transitions, 9640 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 16:19:28,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:19:28,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:19:28,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:19:30,107 INFO L124 PetriNetUnfolderBase]: 3815/6563 cut-off events. [2024-06-04 16:19:30,108 INFO L125 PetriNetUnfolderBase]: For 1670477/1670477 co-relation queries the response was YES. [2024-06-04 16:19:30,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53363 conditions, 6563 events. 3815/6563 cut-off events. For 1670477/1670477 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 46312 event pairs, 905 based on Foata normal form. 10/6570 useless extension candidates. Maximal degree in co-relation 53132. Up to 5499 conditions per place. [2024-06-04 16:19:30,211 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 464 selfloop transitions, 149 changer transitions 0/620 dead transitions. [2024-06-04 16:19:30,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 620 transitions, 10962 flow [2024-06-04 16:19:30,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:19:30,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:19:30,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-04 16:19:30,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6011904761904762 [2024-06-04 16:19:30,212 INFO L175 Difference]: Start difference. First operand has 519 places, 589 transitions, 9640 flow. Second operand 8 states and 202 transitions. [2024-06-04 16:19:30,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 620 transitions, 10962 flow [2024-06-04 16:19:39,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 620 transitions, 10272 flow, removed 65 selfloop flow, removed 8 redundant places. [2024-06-04 16:19:39,125 INFO L231 Difference]: Finished difference. Result has 519 places, 589 transitions, 9257 flow [2024-06-04 16:19:39,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8950, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9257, PETRI_PLACES=519, PETRI_TRANSITIONS=589} [2024-06-04 16:19:39,125 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 476 predicate places. [2024-06-04 16:19:39,125 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 589 transitions, 9257 flow [2024-06-04 16:19:39,125 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 16:19:39,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:19:39,126 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 16:19:39,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-04 16:19:39,126 INFO L420 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:19:39,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:19:39,126 INFO L85 PathProgramCache]: Analyzing trace with hash 614372131, now seen corresponding path program 1 times [2024-06-04 16:19:39,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:19:39,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53724782] [2024-06-04 16:19:39,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:19:39,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:19:39,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:19:39,351 INFO 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 16:19:39,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:19:39,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53724782] [2024-06-04 16:19:39,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53724782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:19:39,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:19:39,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:19:39,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821190441] [2024-06-04 16:19:39,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:19:39,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:19:39,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:19:39,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:19:39,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:19:39,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:19:39,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 589 transitions, 9257 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 16:19:39,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:19:39,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:19:39,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:19:41,209 INFO L124 PetriNetUnfolderBase]: 3835/6599 cut-off events. [2024-06-04 16:19:41,209 INFO L125 PetriNetUnfolderBase]: For 1615678/1615678 co-relation queries the response was YES. [2024-06-04 16:19:41,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52414 conditions, 6599 events. 3835/6599 cut-off events. For 1615678/1615678 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 46590 event pairs, 912 based on Foata normal form. 6/6600 useless extension candidates. Maximal degree in co-relation 52182. Up to 5599 conditions per place. [2024-06-04 16:19:41,320 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 489 selfloop transitions, 120 changer transitions 0/616 dead transitions. [2024-06-04 16:19:41,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 616 transitions, 10587 flow [2024-06-04 16:19:41,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:19:41,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:19:41,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 261 transitions. [2024-06-04 16:19:41,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5178571428571429 [2024-06-04 16:19:41,321 INFO L175 Difference]: Start difference. First operand has 519 places, 589 transitions, 9257 flow. Second operand 12 states and 261 transitions. [2024-06-04 16:19:41,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 616 transitions, 10587 flow [2024-06-04 16:19:53,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 616 transitions, 10267 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-04 16:19:53,106 INFO L231 Difference]: Finished difference. Result has 524 places, 590 transitions, 9211 flow [2024-06-04 16:19:53,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8937, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9211, PETRI_PLACES=524, PETRI_TRANSITIONS=590} [2024-06-04 16:19:53,106 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 481 predicate places. [2024-06-04 16:19:53,106 INFO L495 AbstractCegarLoop]: Abstraction has has 524 places, 590 transitions, 9211 flow [2024-06-04 16:19:53,106 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 16:19:53,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:19:53,107 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 16:19:53,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-04 16:19:53,107 INFO L420 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:19:53,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:19:53,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1084938913, now seen corresponding path program 2 times [2024-06-04 16:19:53,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:19:53,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504133380] [2024-06-04 16:19:53,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:19:53,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:19:53,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:19:53,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:19:53,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:19:53,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504133380] [2024-06-04 16:19:53,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504133380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:19:53,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:19:53,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:19:53,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519513911] [2024-06-04 16:19:53,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:19:53,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:19:53,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:19:53,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:19:53,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:19:53,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:19:53,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 524 places, 590 transitions, 9211 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 16:19:53,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:19:53,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:19:53,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:19:55,082 INFO L124 PetriNetUnfolderBase]: 3855/6643 cut-off events. [2024-06-04 16:19:55,082 INFO L125 PetriNetUnfolderBase]: For 1633281/1633281 co-relation queries the response was YES. [2024-06-04 16:19:55,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52653 conditions, 6643 events. 3855/6643 cut-off events. For 1633281/1633281 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 46922 event pairs, 885 based on Foata normal form. 6/6644 useless extension candidates. Maximal degree in co-relation 52420. Up to 5204 conditions per place. [2024-06-04 16:19:55,184 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 486 selfloop transitions, 128 changer transitions 0/621 dead transitions. [2024-06-04 16:19:55,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 534 places, 621 transitions, 10917 flow [2024-06-04 16:19:55,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:19:55,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:19:55,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 247 transitions. [2024-06-04 16:19:55,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5346320346320347 [2024-06-04 16:19:55,185 INFO L175 Difference]: Start difference. First operand has 524 places, 590 transitions, 9211 flow. Second operand 11 states and 247 transitions. [2024-06-04 16:19:55,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 534 places, 621 transitions, 10917 flow [2024-06-04 16:20:06,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 621 transitions, 10653 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-04 16:20:06,267 INFO L231 Difference]: Finished difference. Result has 525 places, 591 transitions, 9237 flow [2024-06-04 16:20:06,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8947, PETRI_DIFFERENCE_MINUEND_PLACES=514, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9237, PETRI_PLACES=525, PETRI_TRANSITIONS=591} [2024-06-04 16:20:06,267 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 482 predicate places. [2024-06-04 16:20:06,267 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 591 transitions, 9237 flow [2024-06-04 16:20:06,268 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 16:20:06,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:20:06,268 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 16:20:06,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-04 16:20:06,268 INFO L420 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:20:06,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:20:06,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1085205823, now seen corresponding path program 3 times [2024-06-04 16:20:06,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:20:06,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922190042] [2024-06-04 16:20:06,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:20:06,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:20:06,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:20:06,489 INFO 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 16:20:06,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:20:06,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922190042] [2024-06-04 16:20:06,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922190042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:20:06,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:20:06,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:20:06,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106208124] [2024-06-04 16:20:06,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:20:06,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:20:06,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:20:06,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:20:06,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:20:06,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:20:06,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 591 transitions, 9237 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 16:20:06,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:20:06,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:20:06,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:20:08,298 INFO L124 PetriNetUnfolderBase]: 3842/6624 cut-off events. [2024-06-04 16:20:08,298 INFO L125 PetriNetUnfolderBase]: For 1564947/1564947 co-relation queries the response was YES. [2024-06-04 16:20:08,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51628 conditions, 6624 events. 3842/6624 cut-off events. For 1564947/1564947 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 46807 event pairs, 887 based on Foata normal form. 6/6625 useless extension candidates. Maximal degree in co-relation 51394. Up to 5198 conditions per place. [2024-06-04 16:20:08,402 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 488 selfloop transitions, 124 changer transitions 0/619 dead transitions. [2024-06-04 16:20:08,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 619 transitions, 10557 flow [2024-06-04 16:20:08,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:20:08,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:20:08,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 244 transitions. [2024-06-04 16:20:08,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5281385281385281 [2024-06-04 16:20:08,403 INFO L175 Difference]: Start difference. First operand has 525 places, 591 transitions, 9237 flow. Second operand 11 states and 244 transitions. [2024-06-04 16:20:08,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 619 transitions, 10557 flow [2024-06-04 16:20:20,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 619 transitions, 10264 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-04 16:20:20,344 INFO L231 Difference]: Finished difference. Result has 528 places, 591 transitions, 9196 flow [2024-06-04 16:20:20,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8944, PETRI_DIFFERENCE_MINUEND_PLACES=517, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9196, PETRI_PLACES=528, PETRI_TRANSITIONS=591} [2024-06-04 16:20:20,344 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 485 predicate places. [2024-06-04 16:20:20,344 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 591 transitions, 9196 flow [2024-06-04 16:20:20,345 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 16:20:20,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:20:20,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:20:20,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-04 16:20:20,345 INFO L420 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:20:20,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:20:20,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1308080949, now seen corresponding path program 4 times [2024-06-04 16:20:20,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:20:20,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368516374] [2024-06-04 16:20:20,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:20:20,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:20:20,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:20:20,564 INFO 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 16:20:20,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:20:20,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368516374] [2024-06-04 16:20:20,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368516374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:20:20,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:20:20,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:20:20,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911839931] [2024-06-04 16:20:20,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:20:20,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:20:20,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:20:20,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:20:20,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:20:20,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:20:20,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 591 transitions, 9196 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 16:20:20,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:20:20,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:20:20,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:20:22,447 INFO L124 PetriNetUnfolderBase]: 3829/6613 cut-off events. [2024-06-04 16:20:22,447 INFO L125 PetriNetUnfolderBase]: For 1492663/1492663 co-relation queries the response was YES. [2024-06-04 16:20:22,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50309 conditions, 6613 events. 3829/6613 cut-off events. For 1492663/1492663 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 46901 event pairs, 611 based on Foata normal form. 6/6615 useless extension candidates. Maximal degree in co-relation 50074. Up to 4866 conditions per place. [2024-06-04 16:20:22,552 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 505 selfloop transitions, 120 changer transitions 1/633 dead transitions. [2024-06-04 16:20:22,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 633 transitions, 10623 flow [2024-06-04 16:20:22,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:20:22,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:20:22,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-04 16:20:22,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6279761904761905 [2024-06-04 16:20:22,553 INFO L175 Difference]: Start difference. First operand has 528 places, 591 transitions, 9196 flow. Second operand 8 states and 211 transitions. [2024-06-04 16:20:22,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 633 transitions, 10623 flow [2024-06-04 16:20:30,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 633 transitions, 10336 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-04 16:20:30,873 INFO L231 Difference]: Finished difference. Result has 526 places, 592 transitions, 9192 flow [2024-06-04 16:20:30,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8921, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9192, PETRI_PLACES=526, PETRI_TRANSITIONS=592} [2024-06-04 16:20:30,874 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 483 predicate places. [2024-06-04 16:20:30,874 INFO L495 AbstractCegarLoop]: Abstraction has has 526 places, 592 transitions, 9192 flow [2024-06-04 16:20:30,874 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 16:20:30,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:20:30,874 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 16:20:30,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-04 16:20:30,874 INFO L420 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:20:30,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:20:30,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1244611325, now seen corresponding path program 5 times [2024-06-04 16:20:30,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:20:30,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779740225] [2024-06-04 16:20:30,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:20:30,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:20:30,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:20:31,123 INFO 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 16:20:31,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:20:31,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779740225] [2024-06-04 16:20:31,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779740225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:20:31,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:20:31,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:20:31,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156631610] [2024-06-04 16:20:31,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:20:31,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:20:31,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:20:31,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:20:31,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:20:31,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:20:31,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 526 places, 592 transitions, 9192 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 16:20:31,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:20:31,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:20:31,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:20:32,944 INFO L124 PetriNetUnfolderBase]: 3849/6660 cut-off events. [2024-06-04 16:20:32,945 INFO L125 PetriNetUnfolderBase]: For 1510729/1510729 co-relation queries the response was YES. [2024-06-04 16:20:33,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50582 conditions, 6660 events. 3849/6660 cut-off events. For 1510729/1510729 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 47348 event pairs, 551 based on Foata normal form. 6/6663 useless extension candidates. Maximal degree in co-relation 50346. Up to 4045 conditions per place. [2024-06-04 16:20:33,049 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 505 selfloop transitions, 118 changer transitions 0/630 dead transitions. [2024-06-04 16:20:33,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 630 transitions, 11322 flow [2024-06-04 16:20:33,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:20:33,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:20:33,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-04 16:20:33,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292517006802721 [2024-06-04 16:20:33,050 INFO L175 Difference]: Start difference. First operand has 526 places, 592 transitions, 9192 flow. Second operand 7 states and 185 transitions. [2024-06-04 16:20:33,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 630 transitions, 11322 flow [2024-06-04 16:20:44,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 630 transitions, 11121 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-04 16:20:44,340 INFO L231 Difference]: Finished difference. Result has 527 places, 594 transitions, 9295 flow [2024-06-04 16:20:44,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8995, PETRI_DIFFERENCE_MINUEND_PLACES=520, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9295, PETRI_PLACES=527, PETRI_TRANSITIONS=594} [2024-06-04 16:20:44,341 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 484 predicate places. [2024-06-04 16:20:44,341 INFO L495 AbstractCegarLoop]: Abstraction has has 527 places, 594 transitions, 9295 flow [2024-06-04 16:20:44,341 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 16:20:44,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:20:44,341 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 16:20:44,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2024-06-04 16:20:44,341 INFO L420 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:20:44,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:20:44,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1244878235, now seen corresponding path program 6 times [2024-06-04 16:20:44,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:20:44,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999896126] [2024-06-04 16:20:44,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:20:44,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:20:44,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:20:44,559 INFO 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 16:20:44,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:20:44,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999896126] [2024-06-04 16:20:44,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999896126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:20:44,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:20:44,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:20:44,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434060513] [2024-06-04 16:20:44,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:20:44,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:20:44,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:20:44,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:20:44,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:20:44,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:20:44,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 527 places, 594 transitions, 9295 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 16:20:44,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:20:44,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:20:44,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:20:46,355 INFO L124 PetriNetUnfolderBase]: 3836/6625 cut-off events. [2024-06-04 16:20:46,355 INFO L125 PetriNetUnfolderBase]: For 1428431/1428431 co-relation queries the response was YES. [2024-06-04 16:20:46,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49578 conditions, 6625 events. 3836/6625 cut-off events. For 1428431/1428431 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 46971 event pairs, 647 based on Foata normal form. 6/6628 useless extension candidates. Maximal degree in co-relation 49342. Up to 4039 conditions per place. [2024-06-04 16:20:46,460 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 503 selfloop transitions, 118 changer transitions 0/628 dead transitions. [2024-06-04 16:20:46,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 533 places, 628 transitions, 11013 flow [2024-06-04 16:20:46,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:20:46,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:20:46,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-04 16:20:46,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-06-04 16:20:46,461 INFO L175 Difference]: Start difference. First operand has 527 places, 594 transitions, 9295 flow. Second operand 7 states and 184 transitions. [2024-06-04 16:20:46,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 533 places, 628 transitions, 11013 flow [2024-06-04 16:20:56,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 628 transitions, 10816 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-04 16:20:56,255 INFO L231 Difference]: Finished difference. Result has 531 places, 594 transitions, 9340 flow [2024-06-04 16:20:56,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9098, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9340, PETRI_PLACES=531, PETRI_TRANSITIONS=594} [2024-06-04 16:20:56,256 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 488 predicate places. [2024-06-04 16:20:56,256 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 594 transitions, 9340 flow [2024-06-04 16:20:56,256 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 16:20:56,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:20:56,256 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 16:20:56,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2024-06-04 16:20:56,256 INFO L420 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:20:56,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:20:56,257 INFO L85 PathProgramCache]: Analyzing trace with hash 856789001, now seen corresponding path program 1 times [2024-06-04 16:20:56,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:20:56,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097396370] [2024-06-04 16:20:56,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:20:56,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:20:56,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:20:56,479 INFO 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 16:20:56,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:20:56,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097396370] [2024-06-04 16:20:56,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097396370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:20:56,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:20:56,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:20:56,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387526685] [2024-06-04 16:20:56,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:20:56,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:20:56,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:20:56,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:20:56,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:20:56,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:20:56,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 594 transitions, 9340 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 16:20:56,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:20:56,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:20:56,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:20:58,510 INFO L124 PetriNetUnfolderBase]: 3889/6717 cut-off events. [2024-06-04 16:20:58,510 INFO L125 PetriNetUnfolderBase]: For 1534915/1534915 co-relation queries the response was YES. [2024-06-04 16:20:58,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51249 conditions, 6717 events. 3889/6717 cut-off events. For 1534915/1534915 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 47722 event pairs, 647 based on Foata normal form. 6/6719 useless extension candidates. Maximal degree in co-relation 51012. Up to 5098 conditions per place. [2024-06-04 16:20:58,614 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 576 selfloop transitions, 60 changer transitions 4/647 dead transitions. [2024-06-04 16:20:58,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 647 transitions, 11542 flow [2024-06-04 16:20:58,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:20:58,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:20:58,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 244 transitions. [2024-06-04 16:20:58,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.580952380952381 [2024-06-04 16:20:58,617 INFO L175 Difference]: Start difference. First operand has 531 places, 594 transitions, 9340 flow. Second operand 10 states and 244 transitions. [2024-06-04 16:20:58,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 647 transitions, 11542 flow [2024-06-04 16:21:09,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 647 transitions, 11307 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-04 16:21:09,589 INFO L231 Difference]: Finished difference. Result has 536 places, 596 transitions, 9286 flow [2024-06-04 16:21:09,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9105, PETRI_DIFFERENCE_MINUEND_PLACES=526, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9286, PETRI_PLACES=536, PETRI_TRANSITIONS=596} [2024-06-04 16:21:09,589 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 493 predicate places. [2024-06-04 16:21:09,589 INFO L495 AbstractCegarLoop]: Abstraction has has 536 places, 596 transitions, 9286 flow [2024-06-04 16:21:09,589 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 16:21:09,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:21:09,590 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, 1] [2024-06-04 16:21:09,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2024-06-04 16:21:09,590 INFO L420 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:21:09,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:21:09,590 INFO L85 PathProgramCache]: Analyzing trace with hash -514865335, now seen corresponding path program 1 times [2024-06-04 16:21:09,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:21:09,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302886816] [2024-06-04 16:21:09,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:21:09,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:21:09,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:21:09,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:21:09,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:21:09,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302886816] [2024-06-04 16:21:09,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302886816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:21:09,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:21:09,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:21:09,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331756737] [2024-06-04 16:21:09,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:21:09,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:21:09,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:21:09,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:21:09,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:21:09,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:21:09,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 596 transitions, 9286 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 16:21:09,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:21:09,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:21:09,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:21:11,881 INFO L124 PetriNetUnfolderBase]: 4115/7096 cut-off events. [2024-06-04 16:21:11,881 INFO L125 PetriNetUnfolderBase]: For 2164313/2164313 co-relation queries the response was YES. [2024-06-04 16:21:11,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60730 conditions, 7096 events. 4115/7096 cut-off events. For 2164313/2164313 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 50748 event pairs, 942 based on Foata normal form. 6/7099 useless extension candidates. Maximal degree in co-relation 60492. Up to 3110 conditions per place. [2024-06-04 16:21:11,997 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 449 selfloop transitions, 179 changer transitions 0/635 dead transitions. [2024-06-04 16:21:11,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 543 places, 635 transitions, 11554 flow [2024-06-04 16:21:11,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:21:11,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:21:11,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-04 16:21:11,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-04 16:21:11,998 INFO L175 Difference]: Start difference. First operand has 536 places, 596 transitions, 9286 flow. Second operand 8 states and 200 transitions. [2024-06-04 16:21:11,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 543 places, 635 transitions, 11554 flow Killed by 15