./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 [2024-06-03 20:42:09,760 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 20:42:09,838 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 20:42:09,845 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 20:42:09,845 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 20:42:09,873 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 20:42:09,873 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 20:42:09,874 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 20:42:09,874 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 20:42:09,878 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 20:42:09,878 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 20:42:09,878 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 20:42:09,879 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 20:42:09,881 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 20:42:09,881 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 20:42:09,881 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 20:42:09,882 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 20:42:09,882 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 20:42:09,882 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 20:42:09,882 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 20:42:09,883 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 20:42:09,883 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 20:42:09,883 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 20:42:09,884 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 20:42:09,884 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 20:42:09,884 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 20:42:09,884 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 20:42:09,897 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 20:42:09,897 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 20:42:09,898 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 20:42:09,899 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 20:42:09,899 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 20:42:09,900 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 20:42:09,900 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 20:42:09,900 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 20:42:09,900 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 20:42:09,901 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 20:42:09,901 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 20:42:09,901 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 20:42:09,901 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 20:42:09,901 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 20:42:09,902 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 20:42:09,902 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 20:42:09,902 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 20:42:10,147 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 20:42:10,166 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 20:42:10,168 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 20:42:10,169 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 20:42:10,169 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 20:42:10,170 INFO L431 ainManager$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 [2024-06-03 20:42:11,289 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 20:42:11,470 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 20:42:11,471 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe015_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-03 20:42:11,486 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bab522edc/185a9fbdc1e2481ebcfa25a93ea12284/FLAGcc831cacd [2024-06-03 20:42:11,499 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bab522edc/185a9fbdc1e2481ebcfa25a93ea12284 [2024-06-03 20:42:11,501 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 20:42:11,502 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 20:42:11,503 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/safe015_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-03 20:42:11,651 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 20:42:11,652 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 20:42:11,653 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 20:42:11,653 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 20:42:11,658 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 20:42:11,658 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 08:42:11" (1/2) ... [2024-06-03 20:42:11,659 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18eb7a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:42:11, skipping insertion in model container [2024-06-03 20:42:11,659 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 08:42:11" (1/2) ... [2024-06-03 20:42:11,661 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@708fbcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:42:11, skipping insertion in model container [2024-06-03 20:42:11,661 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:42:11" (2/2) ... [2024-06-03 20:42:11,662 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18eb7a2 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:42:11, skipping insertion in model container [2024-06-03 20:42:11,662 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:42:11" (2/2) ... [2024-06-03 20:42:11,663 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 20:42:11,715 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 20:42:11,716 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))) [2024-06-03 20:42:11,716 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))) [2024-06-03 20:42:11,716 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))) [2024-06-03 20:42:11,717 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 20:42:11,717 INFO L106 edCorrectnessWitness]: ghost_update [L779-L779] multithreaded = 1; [2024-06-03 20:42:11,779 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 20:42:12,045 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 20:42:12,057 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 20:42:12,175 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 20:42:12,239 INFO L206 MainTranslator]: Completed translation [2024-06-03 20:42:12,239 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:42:12 WrapperNode [2024-06-03 20:42:12,239 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 20:42:12,257 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 20:42:12,257 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 20:42:12,257 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 20:42:12,263 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:42:12" (1/1) ... [2024-06-03 20:42:12,336 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:42:12" (1/1) ... [2024-06-03 20:42:12,378 INFO L138 Inliner]: procedures = 175, calls = 44, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 65 [2024-06-03 20:42:12,378 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 20:42:12,379 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 20:42:12,379 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 20:42:12,379 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 20:42:12,389 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:42:12" (1/1) ... [2024-06-03 20:42:12,389 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:42:12" (1/1) ... [2024-06-03 20:42:12,395 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:42:12" (1/1) ... [2024-06-03 20:42:12,417 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]. [2024-06-03 20:42:12,420 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:42:12" (1/1) ... [2024-06-03 20:42:12,420 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:42:12" (1/1) ... [2024-06-03 20:42:12,424 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:42:12" (1/1) ... [2024-06-03 20:42:12,426 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:42:12" (1/1) ... [2024-06-03 20:42:12,427 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:42:12" (1/1) ... [2024-06-03 20:42:12,429 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:42:12" (1/1) ... [2024-06-03 20:42:12,431 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 20:42:12,432 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 20:42:12,432 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 20:42:12,432 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 20:42:12,433 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:42:12" (1/1) ... [2024-06-03 20:42:12,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 20:42:12,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 20:42:12,473 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) [2024-06-03 20:42:12,475 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 [2024-06-03 20:42:12,500 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 20:42:12,500 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 20:42:12,500 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 20:42:12,500 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 20:42:12,501 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 20:42:12,501 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 20:42:12,501 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 20:42:12,501 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 20:42:12,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 20:42:12,501 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 20:42:12,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 20:42:12,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 20:42:12,502 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 20:42:12,600 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 20:42:12,601 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 20:42:12,892 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 20:42:12,893 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 20:42:12,997 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 20:42:12,997 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 20:42:12,998 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 08:42:12 BoogieIcfgContainer [2024-06-03 20:42:12,998 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 20:42:13,000 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 20:42:13,000 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 20:42:13,003 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 20:42:13,004 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 08:42:11" (1/4) ... [2024-06-03 20:42:13,004 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78108655 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 08:42:13, skipping insertion in model container [2024-06-03 20:42:13,004 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:42:11" (2/4) ... [2024-06-03 20:42:13,005 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78108655 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 08:42:13, skipping insertion in model container [2024-06-03 20:42:13,005 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:42:12" (3/4) ... [2024-06-03 20:42:13,005 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78108655 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 08:42:13, skipping insertion in model container [2024-06-03 20:42:13,005 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 08:42:12" (4/4) ... [2024-06-03 20:42:13,007 INFO L112 eAbstractionObserver]: Analyzing ICFG safe015_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-03 20:42:13,023 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 20:42:13,024 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-03 20:42:13,024 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 20:42:13,079 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 20:42:13,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-03 20:42:13,157 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-03 20:42:13,158 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 20:42:13,159 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. [2024-06-03 20:42:13,160 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-03 20:42:13,166 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-03 20:42:13,180 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 20:42:13,188 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;@1010a9c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 20:42:13,188 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-03 20:42:13,194 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 20:42:13,194 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-03 20:42:13,194 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 20:42:13,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:13,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 20:42:13,196 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)] === [2024-06-03 20:42:13,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:13,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1782944907, now seen corresponding path program 1 times [2024-06-03 20:42:13,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:13,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306182195] [2024-06-03 20:42:13,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:13,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:13,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:13,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:13,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:13,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306182195] [2024-06-03 20:42:13,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306182195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:13,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:13,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 20:42:13,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96594622] [2024-06-03 20:42:13,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:13,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 20:42:13,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:13,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 20:42:13,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 20:42:13,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-03 20:42:13,986 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) [2024-06-03 20:42:13,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:13,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-03 20:42:13,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:14,276 INFO L124 PetriNetUnfolderBase]: 603/1019 cut-off events. [2024-06-03 20:42:14,277 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-06-03 20:42:14,285 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. [2024-06-03 20:42:14,292 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 30 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-03 20:42:14,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 169 flow [2024-06-03 20:42:14,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 20:42:14,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 20:42:14,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 85 transitions. [2024-06-03 20:42:14,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6746031746031746 [2024-06-03 20:42:14,306 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 85 transitions. [2024-06-03 20:42:14,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 169 flow [2024-06-03 20:42:14,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 164 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 20:42:14,312 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-03 20:42:14,314 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} [2024-06-03 20:42:14,319 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-03 20:42:14,319 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-03 20:42:14,319 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) [2024-06-03 20:42:14,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:14,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:14,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 20:42:14,320 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)] === [2024-06-03 20:42:14,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:14,321 INFO L85 PathProgramCache]: Analyzing trace with hash 281906836, now seen corresponding path program 1 times [2024-06-03 20:42:14,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:14,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802454110] [2024-06-03 20:42:14,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:14,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:14,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:14,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:14,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:14,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802454110] [2024-06-03 20:42:14,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802454110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:14,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:14,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 20:42:14,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617646623] [2024-06-03 20:42:14,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:14,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 20:42:14,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:14,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 20:42:14,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 20:42:14,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-03 20:42:14,684 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) [2024-06-03 20:42:14,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:14,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-03 20:42:14,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:14,849 INFO L124 PetriNetUnfolderBase]: 604/1029 cut-off events. [2024-06-03 20:42:14,850 INFO L125 PetriNetUnfolderBase]: For 201/209 co-relation queries the response was YES. [2024-06-03 20:42:14,851 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. [2024-06-03 20:42:14,856 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 39 selfloop transitions, 11 changer transitions 0/59 dead transitions. [2024-06-03 20:42:14,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 59 transitions, 266 flow [2024-06-03 20:42:14,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:42:14,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:42:14,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 115 transitions. [2024-06-03 20:42:14,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6845238095238095 [2024-06-03 20:42:14,858 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 115 transitions. [2024-06-03 20:42:14,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 59 transitions, 266 flow [2024-06-03 20:42:14,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 59 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 20:42:14,861 INFO L231 Difference]: Finished difference. Result has 47 places, 44 transitions, 174 flow [2024-06-03 20:42:14,861 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} [2024-06-03 20:42:14,862 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 4 predicate places. [2024-06-03 20:42:14,862 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 174 flow [2024-06-03 20:42:14,862 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) [2024-06-03 20:42:14,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:14,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:14,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 20:42:14,863 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)] === [2024-06-03 20:42:14,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:14,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1529058956, now seen corresponding path program 1 times [2024-06-03 20:42:14,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:14,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698152167] [2024-06-03 20:42:14,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:14,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:14,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:15,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:15,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:15,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698152167] [2024-06-03 20:42:15,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698152167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:15,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:15,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 20:42:15,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915014690] [2024-06-03 20:42:15,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:15,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 20:42:15,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:15,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 20:42:15,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 20:42:15,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:15,233 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) [2024-06-03 20:42:15,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:15,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:15,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:15,432 INFO L124 PetriNetUnfolderBase]: 934/1514 cut-off events. [2024-06-03 20:42:15,433 INFO L125 PetriNetUnfolderBase]: For 1013/1013 co-relation queries the response was YES. [2024-06-03 20:42:15,436 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. [2024-06-03 20:42:15,445 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 49 selfloop transitions, 9 changer transitions 0/65 dead transitions. [2024-06-03 20:42:15,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 65 transitions, 365 flow [2024-06-03 20:42:15,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:42:15,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:42:15,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-06-03 20:42:15,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-03 20:42:15,451 INFO L175 Difference]: Start difference. First operand has 47 places, 44 transitions, 174 flow. Second operand 4 states and 104 transitions. [2024-06-03 20:42:15,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 65 transitions, 365 flow [2024-06-03 20:42:15,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 65 transitions, 361 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-03 20:42:15,456 INFO L231 Difference]: Finished difference. Result has 52 places, 52 transitions, 250 flow [2024-06-03 20:42:15,456 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} [2024-06-03 20:42:15,457 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-03 20:42:15,458 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 52 transitions, 250 flow [2024-06-03 20:42:15,458 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) [2024-06-03 20:42:15,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:15,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:15,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 20:42:15,459 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)] === [2024-06-03 20:42:15,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:15,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1136654126, now seen corresponding path program 1 times [2024-06-03 20:42:15,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:15,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413388671] [2024-06-03 20:42:15,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:15,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:15,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:15,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:15,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:15,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413388671] [2024-06-03 20:42:15,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413388671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:15,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:15,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:42:15,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736139355] [2024-06-03 20:42:15,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:15,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:42:15,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:15,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:42:15,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:42:15,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-03 20:42:15,836 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) [2024-06-03 20:42:15,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:15,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-03 20:42:15,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:16,126 INFO L124 PetriNetUnfolderBase]: 934/1539 cut-off events. [2024-06-03 20:42:16,126 INFO L125 PetriNetUnfolderBase]: For 1914/1935 co-relation queries the response was YES. [2024-06-03 20:42:16,130 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. [2024-06-03 20:42:16,137 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 59 selfloop transitions, 19 changer transitions 0/88 dead transitions. [2024-06-03 20:42:16,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 88 transitions, 516 flow [2024-06-03 20:42:16,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:42:16,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:42:16,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-03 20:42:16,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6468253968253969 [2024-06-03 20:42:16,139 INFO L175 Difference]: Start difference. First operand has 52 places, 52 transitions, 250 flow. Second operand 6 states and 163 transitions. [2024-06-03 20:42:16,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 88 transitions, 516 flow [2024-06-03 20:42:16,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 88 transitions, 512 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-03 20:42:16,144 INFO L231 Difference]: Finished difference. Result has 58 places, 57 transitions, 329 flow [2024-06-03 20:42:16,144 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} [2024-06-03 20:42:16,145 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 15 predicate places. [2024-06-03 20:42:16,145 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 57 transitions, 329 flow [2024-06-03 20:42:16,145 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) [2024-06-03 20:42:16,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:16,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:16,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 20:42:16,146 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)] === [2024-06-03 20:42:16,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:16,146 INFO L85 PathProgramCache]: Analyzing trace with hash 132057963, now seen corresponding path program 1 times [2024-06-03 20:42:16,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:16,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767721528] [2024-06-03 20:42:16,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:16,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:16,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:16,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:16,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:16,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767721528] [2024-06-03 20:42:16,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767721528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:16,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:16,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 20:42:16,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336624811] [2024-06-03 20:42:16,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:16,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 20:42:16,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:16,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 20:42:16,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 20:42:16,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:16,515 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) [2024-06-03 20:42:16,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:16,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:16,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:16,699 INFO L124 PetriNetUnfolderBase]: 953/1562 cut-off events. [2024-06-03 20:42:16,700 INFO L125 PetriNetUnfolderBase]: For 2704/2706 co-relation queries the response was YES. [2024-06-03 20:42:16,704 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. [2024-06-03 20:42:16,712 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 53 selfloop transitions, 9 changer transitions 0/69 dead transitions. [2024-06-03 20:42:16,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 69 transitions, 486 flow [2024-06-03 20:42:16,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:42:16,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:42:16,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-03 20:42:16,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6011904761904762 [2024-06-03 20:42:16,714 INFO L175 Difference]: Start difference. First operand has 58 places, 57 transitions, 329 flow. Second operand 4 states and 101 transitions. [2024-06-03 20:42:16,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 69 transitions, 486 flow [2024-06-03 20:42:16,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 69 transitions, 448 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-03 20:42:16,720 INFO L231 Difference]: Finished difference. Result has 59 places, 58 transitions, 322 flow [2024-06-03 20:42:16,720 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} [2024-06-03 20:42:16,721 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-03 20:42:16,721 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 58 transitions, 322 flow [2024-06-03 20:42:16,721 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) [2024-06-03 20:42:16,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:16,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:16,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 20:42:16,722 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)] === [2024-06-03 20:42:16,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:16,722 INFO L85 PathProgramCache]: Analyzing trace with hash -207844287, now seen corresponding path program 1 times [2024-06-03 20:42:16,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:16,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369434453] [2024-06-03 20:42:16,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:16,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:16,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:17,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:17,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:17,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369434453] [2024-06-03 20:42:17,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369434453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:17,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:17,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:42:17,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704415463] [2024-06-03 20:42:17,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:17,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:42:17,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:17,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:42:17,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:42:17,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:17,039 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) [2024-06-03 20:42:17,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:17,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:17,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:17,274 INFO L124 PetriNetUnfolderBase]: 964/1574 cut-off events. [2024-06-03 20:42:17,275 INFO L125 PetriNetUnfolderBase]: For 3150/3150 co-relation queries the response was YES. [2024-06-03 20:42:17,279 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. [2024-06-03 20:42:17,287 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 64 selfloop transitions, 16 changer transitions 0/87 dead transitions. [2024-06-03 20:42:17,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 87 transitions, 591 flow [2024-06-03 20:42:17,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:42:17,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:42:17,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-03 20:42:17,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-03 20:42:17,288 INFO L175 Difference]: Start difference. First operand has 59 places, 58 transitions, 322 flow. Second operand 5 states and 130 transitions. [2024-06-03 20:42:17,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 87 transitions, 591 flow [2024-06-03 20:42:17,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 87 transitions, 579 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-03 20:42:17,296 INFO L231 Difference]: Finished difference. Result has 64 places, 66 transitions, 406 flow [2024-06-03 20:42:17,296 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} [2024-06-03 20:42:17,297 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-06-03 20:42:17,297 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 66 transitions, 406 flow [2024-06-03 20:42:17,298 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) [2024-06-03 20:42:17,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:17,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:17,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 20:42:17,298 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)] === [2024-06-03 20:42:17,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:17,298 INFO L85 PathProgramCache]: Analyzing trace with hash 571898403, now seen corresponding path program 2 times [2024-06-03 20:42:17,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:17,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982303902] [2024-06-03 20:42:17,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:17,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:17,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:17,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:17,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:17,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982303902] [2024-06-03 20:42:17,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982303902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:17,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:17,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:42:17,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702805217] [2024-06-03 20:42:17,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:17,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:42:17,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:17,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:42:17,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:42:17,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:17,581 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) [2024-06-03 20:42:17,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:17,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:17,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:17,809 INFO L124 PetriNetUnfolderBase]: 959/1560 cut-off events. [2024-06-03 20:42:17,809 INFO L125 PetriNetUnfolderBase]: For 4457/4457 co-relation queries the response was YES. [2024-06-03 20:42:17,814 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. [2024-06-03 20:42:17,824 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 60 selfloop transitions, 19 changer transitions 0/86 dead transitions. [2024-06-03 20:42:17,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 86 transitions, 650 flow [2024-06-03 20:42:17,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:42:17,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:42:17,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-03 20:42:17,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-03 20:42:17,826 INFO L175 Difference]: Start difference. First operand has 64 places, 66 transitions, 406 flow. Second operand 5 states and 126 transitions. [2024-06-03 20:42:17,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 86 transitions, 650 flow [2024-06-03 20:42:17,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 86 transitions, 630 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-03 20:42:17,834 INFO L231 Difference]: Finished difference. Result has 68 places, 69 transitions, 454 flow [2024-06-03 20:42:17,834 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} [2024-06-03 20:42:17,835 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 25 predicate places. [2024-06-03 20:42:17,835 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 69 transitions, 454 flow [2024-06-03 20:42:17,835 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) [2024-06-03 20:42:17,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:17,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:17,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 20:42:17,836 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)] === [2024-06-03 20:42:17,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:17,837 INFO L85 PathProgramCache]: Analyzing trace with hash 334807972, now seen corresponding path program 1 times [2024-06-03 20:42:17,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:17,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439630798] [2024-06-03 20:42:17,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:17,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:17,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:18,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:18,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:18,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439630798] [2024-06-03 20:42:18,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439630798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:18,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:18,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:42:18,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638714638] [2024-06-03 20:42:18,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:18,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:42:18,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:18,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:42:18,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:42:18,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:18,102 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) [2024-06-03 20:42:18,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:18,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:18,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:18,327 INFO L124 PetriNetUnfolderBase]: 970/1592 cut-off events. [2024-06-03 20:42:18,327 INFO L125 PetriNetUnfolderBase]: For 5493/5493 co-relation queries the response was YES. [2024-06-03 20:42:18,332 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. [2024-06-03 20:42:18,341 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 64 selfloop transitions, 21 changer transitions 0/92 dead transitions. [2024-06-03 20:42:18,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 92 transitions, 725 flow [2024-06-03 20:42:18,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:42:18,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:42:18,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-03 20:42:18,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-03 20:42:18,343 INFO L175 Difference]: Start difference. First operand has 68 places, 69 transitions, 454 flow. Second operand 5 states and 130 transitions. [2024-06-03 20:42:18,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 92 transitions, 725 flow [2024-06-03 20:42:18,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 92 transitions, 695 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-03 20:42:18,352 INFO L231 Difference]: Finished difference. Result has 71 places, 72 transitions, 498 flow [2024-06-03 20:42:18,352 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} [2024-06-03 20:42:18,353 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 28 predicate places. [2024-06-03 20:42:18,353 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 72 transitions, 498 flow [2024-06-03 20:42:18,353 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) [2024-06-03 20:42:18,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:18,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:18,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 20:42:18,354 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)] === [2024-06-03 20:42:18,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:18,354 INFO L85 PathProgramCache]: Analyzing trace with hash -457682148, now seen corresponding path program 2 times [2024-06-03 20:42:18,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:18,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724422389] [2024-06-03 20:42:18,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:18,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:18,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:18,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:18,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:18,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724422389] [2024-06-03 20:42:18,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724422389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:18,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:18,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:42:18,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335128252] [2024-06-03 20:42:18,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:18,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:42:18,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:18,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:42:18,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:42:18,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:18,610 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) [2024-06-03 20:42:18,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:18,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:18,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:18,828 INFO L124 PetriNetUnfolderBase]: 965/1581 cut-off events. [2024-06-03 20:42:18,829 INFO L125 PetriNetUnfolderBase]: For 6612/6616 co-relation queries the response was YES. [2024-06-03 20:42:18,833 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. [2024-06-03 20:42:18,851 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 60 selfloop transitions, 21 changer transitions 0/88 dead transitions. [2024-06-03 20:42:18,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 88 transitions, 706 flow [2024-06-03 20:42:18,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:42:18,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:42:18,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-03 20:42:18,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5904761904761905 [2024-06-03 20:42:18,853 INFO L175 Difference]: Start difference. First operand has 71 places, 72 transitions, 498 flow. Second operand 5 states and 124 transitions. [2024-06-03 20:42:18,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 88 transitions, 706 flow [2024-06-03 20:42:18,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 88 transitions, 679 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-03 20:42:18,863 INFO L231 Difference]: Finished difference. Result has 74 places, 73 transitions, 529 flow [2024-06-03 20:42:18,863 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} [2024-06-03 20:42:18,864 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 31 predicate places. [2024-06-03 20:42:18,864 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 73 transitions, 529 flow [2024-06-03 20:42:18,864 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) [2024-06-03 20:42:18,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:18,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:18,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 20:42:18,865 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)] === [2024-06-03 20:42:18,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:18,866 INFO L85 PathProgramCache]: Analyzing trace with hash 549259432, now seen corresponding path program 1 times [2024-06-03 20:42:18,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:18,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767731206] [2024-06-03 20:42:18,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:18,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:18,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:19,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:19,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:19,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767731206] [2024-06-03 20:42:19,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767731206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:19,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:19,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:42:19,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169633870] [2024-06-03 20:42:19,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:19,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:42:19,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:19,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:42:19,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:42:19,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:19,164 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) [2024-06-03 20:42:19,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:19,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:19,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:19,385 INFO L124 PetriNetUnfolderBase]: 957/1574 cut-off events. [2024-06-03 20:42:19,385 INFO L125 PetriNetUnfolderBase]: For 7572/7576 co-relation queries the response was YES. [2024-06-03 20:42:19,391 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. [2024-06-03 20:42:19,398 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 73 selfloop transitions, 11 changer transitions 0/91 dead transitions. [2024-06-03 20:42:19,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 91 transitions, 751 flow [2024-06-03 20:42:19,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:42:19,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:42:19,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-03 20:42:19,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.580952380952381 [2024-06-03 20:42:19,399 INFO L175 Difference]: Start difference. First operand has 74 places, 73 transitions, 529 flow. Second operand 5 states and 122 transitions. [2024-06-03 20:42:19,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 91 transitions, 751 flow [2024-06-03 20:42:19,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 91 transitions, 723 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-03 20:42:19,409 INFO L231 Difference]: Finished difference. Result has 77 places, 75 transitions, 548 flow [2024-06-03 20:42:19,410 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} [2024-06-03 20:42:19,411 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 34 predicate places. [2024-06-03 20:42:19,413 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 75 transitions, 548 flow [2024-06-03 20:42:19,413 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) [2024-06-03 20:42:19,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:19,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:19,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 20:42:19,413 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)] === [2024-06-03 20:42:19,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:19,414 INFO L85 PathProgramCache]: Analyzing trace with hash 323701376, now seen corresponding path program 1 times [2024-06-03 20:42:19,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:19,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457726514] [2024-06-03 20:42:19,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:19,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:19,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:19,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:19,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:19,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457726514] [2024-06-03 20:42:19,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457726514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:19,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:19,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:42:19,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325790011] [2024-06-03 20:42:19,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:19,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:42:19,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:19,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:42:19,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:42:19,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:19,750 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) [2024-06-03 20:42:19,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:19,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:19,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:20,089 INFO L124 PetriNetUnfolderBase]: 1012/1666 cut-off events. [2024-06-03 20:42:20,089 INFO L125 PetriNetUnfolderBase]: For 9208/9208 co-relation queries the response was YES. [2024-06-03 20:42:20,095 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. [2024-06-03 20:42:20,103 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 83 selfloop transitions, 29 changer transitions 0/119 dead transitions. [2024-06-03 20:42:20,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 119 transitions, 988 flow [2024-06-03 20:42:20,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:42:20,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:42:20,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-03 20:42:20,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-06-03 20:42:20,106 INFO L175 Difference]: Start difference. First operand has 77 places, 75 transitions, 548 flow. Second operand 7 states and 184 transitions. [2024-06-03 20:42:20,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 119 transitions, 988 flow [2024-06-03 20:42:20,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 119 transitions, 959 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-03 20:42:20,119 INFO L231 Difference]: Finished difference. Result has 82 places, 85 transitions, 669 flow [2024-06-03 20:42:20,119 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} [2024-06-03 20:42:20,120 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-03 20:42:20,120 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 85 transitions, 669 flow [2024-06-03 20:42:20,120 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) [2024-06-03 20:42:20,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:20,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:20,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 20:42:20,121 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)] === [2024-06-03 20:42:20,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:20,121 INFO L85 PathProgramCache]: Analyzing trace with hash 323821346, now seen corresponding path program 2 times [2024-06-03 20:42:20,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:20,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050650502] [2024-06-03 20:42:20,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:20,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:20,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:20,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:20,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:20,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050650502] [2024-06-03 20:42:20,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050650502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:20,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:20,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:42:20,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306266657] [2024-06-03 20:42:20,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:20,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:42:20,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:20,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:42:20,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:42:20,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:20,401 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) [2024-06-03 20:42:20,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:20,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:20,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:20,671 INFO L124 PetriNetUnfolderBase]: 1023/1698 cut-off events. [2024-06-03 20:42:20,672 INFO L125 PetriNetUnfolderBase]: For 11568/11568 co-relation queries the response was YES. [2024-06-03 20:42:20,678 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. [2024-06-03 20:42:20,686 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 83 selfloop transitions, 32 changer transitions 0/122 dead transitions. [2024-06-03 20:42:20,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 122 transitions, 1119 flow [2024-06-03 20:42:20,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:42:20,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:42:20,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-03 20:42:20,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-03 20:42:20,689 INFO L175 Difference]: Start difference. First operand has 82 places, 85 transitions, 669 flow. Second operand 6 states and 153 transitions. [2024-06-03 20:42:20,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 122 transitions, 1119 flow [2024-06-03 20:42:20,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 122 transitions, 1043 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-03 20:42:20,706 INFO L231 Difference]: Finished difference. Result has 87 places, 97 transitions, 820 flow [2024-06-03 20:42:20,707 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} [2024-06-03 20:42:20,708 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 44 predicate places. [2024-06-03 20:42:20,708 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 97 transitions, 820 flow [2024-06-03 20:42:20,708 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) [2024-06-03 20:42:20,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:20,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:20,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 20:42:20,709 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)] === [2024-06-03 20:42:20,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:20,710 INFO L85 PathProgramCache]: Analyzing trace with hash -161414142, now seen corresponding path program 3 times [2024-06-03 20:42:20,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:20,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267792002] [2024-06-03 20:42:20,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:20,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:20,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:20,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:20,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:20,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267792002] [2024-06-03 20:42:20,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267792002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:20,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:20,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:42:20,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735352543] [2024-06-03 20:42:20,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:20,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:42:20,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:20,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:42:20,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:42:21,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:21,025 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) [2024-06-03 20:42:21,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:21,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:21,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:21,295 INFO L124 PetriNetUnfolderBase]: 1018/1668 cut-off events. [2024-06-03 20:42:21,295 INFO L125 PetriNetUnfolderBase]: For 14135/14135 co-relation queries the response was YES. [2024-06-03 20:42:21,302 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. [2024-06-03 20:42:21,311 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 78 selfloop transitions, 36 changer transitions 0/121 dead transitions. [2024-06-03 20:42:21,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 121 transitions, 1184 flow [2024-06-03 20:42:21,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:42:21,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:42:21,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-03 20:42:21,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-03 20:42:21,313 INFO L175 Difference]: Start difference. First operand has 87 places, 97 transitions, 820 flow. Second operand 6 states and 149 transitions. [2024-06-03 20:42:21,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 121 transitions, 1184 flow [2024-06-03 20:42:21,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 121 transitions, 1148 flow, removed 14 selfloop flow, removed 1 redundant places. [2024-06-03 20:42:21,332 INFO L231 Difference]: Finished difference. Result has 92 places, 100 transitions, 902 flow [2024-06-03 20:42:21,332 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} [2024-06-03 20:42:21,333 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 49 predicate places. [2024-06-03 20:42:21,333 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 100 transitions, 902 flow [2024-06-03 20:42:21,334 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) [2024-06-03 20:42:21,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:21,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:21,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 20:42:21,335 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)] === [2024-06-03 20:42:21,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:21,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1188365619, now seen corresponding path program 1 times [2024-06-03 20:42:21,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:21,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460297183] [2024-06-03 20:42:21,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:21,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:21,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:21,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:21,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:21,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460297183] [2024-06-03 20:42:21,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460297183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:21,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:21,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:42:21,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817330520] [2024-06-03 20:42:21,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:21,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:42:21,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:21,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:42:21,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:42:21,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-03 20:42:21,685 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) [2024-06-03 20:42:21,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:21,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-03 20:42:21,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:21,927 INFO L124 PetriNetUnfolderBase]: 923/1562 cut-off events. [2024-06-03 20:42:21,928 INFO L125 PetriNetUnfolderBase]: For 15403/15408 co-relation queries the response was YES. [2024-06-03 20:42:21,935 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. [2024-06-03 20:42:21,943 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 77 selfloop transitions, 18 changer transitions 0/109 dead transitions. [2024-06-03 20:42:21,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 109 transitions, 1127 flow [2024-06-03 20:42:21,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:42:21,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:42:21,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-06-03 20:42:21,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6130952380952381 [2024-06-03 20:42:21,944 INFO L175 Difference]: Start difference. First operand has 92 places, 100 transitions, 902 flow. Second operand 4 states and 103 transitions. [2024-06-03 20:42:21,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 109 transitions, 1127 flow [2024-06-03 20:42:21,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 109 transitions, 1061 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-03 20:42:21,963 INFO L231 Difference]: Finished difference. Result has 93 places, 100 transitions, 882 flow [2024-06-03 20:42:21,963 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} [2024-06-03 20:42:21,964 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 50 predicate places. [2024-06-03 20:42:21,965 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 100 transitions, 882 flow [2024-06-03 20:42:21,965 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) [2024-06-03 20:42:21,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:21,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:21,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 20:42:21,965 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)] === [2024-06-03 20:42:21,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:21,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1258647021, now seen corresponding path program 1 times [2024-06-03 20:42:21,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:21,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939219522] [2024-06-03 20:42:21,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:21,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:21,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:22,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:22,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:22,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939219522] [2024-06-03 20:42:22,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939219522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:22,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:22,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:42:22,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460067132] [2024-06-03 20:42:22,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:22,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:42:22,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:22,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:42:22,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:42:22,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:22,305 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) [2024-06-03 20:42:22,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:22,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:22,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:22,645 INFO L124 PetriNetUnfolderBase]: 982/1633 cut-off events. [2024-06-03 20:42:22,646 INFO L125 PetriNetUnfolderBase]: For 16651/16651 co-relation queries the response was YES. [2024-06-03 20:42:22,653 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. [2024-06-03 20:42:22,663 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 89 selfloop transitions, 35 changer transitions 0/131 dead transitions. [2024-06-03 20:42:22,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 131 transitions, 1224 flow [2024-06-03 20:42:22,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:42:22,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:42:22,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-03 20:42:22,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6156462585034014 [2024-06-03 20:42:22,665 INFO L175 Difference]: Start difference. First operand has 93 places, 100 transitions, 882 flow. Second operand 7 states and 181 transitions. [2024-06-03 20:42:22,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 131 transitions, 1224 flow [2024-06-03 20:42:22,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 131 transitions, 1172 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-03 20:42:22,690 INFO L231 Difference]: Finished difference. Result has 97 places, 100 transitions, 913 flow [2024-06-03 20:42:22,691 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} [2024-06-03 20:42:22,692 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 54 predicate places. [2024-06-03 20:42:22,692 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 100 transitions, 913 flow [2024-06-03 20:42:22,692 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) [2024-06-03 20:42:22,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:22,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:22,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 20:42:22,693 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)] === [2024-06-03 20:42:22,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:22,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1592418957, now seen corresponding path program 2 times [2024-06-03 20:42:22,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:22,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633892614] [2024-06-03 20:42:22,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:22,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:22,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:22,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:22,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:22,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633892614] [2024-06-03 20:42:22,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633892614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:22,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:22,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:42:22,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686478604] [2024-06-03 20:42:22,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:22,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:42:22,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:22,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:42:22,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:42:23,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:23,002 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) [2024-06-03 20:42:23,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:23,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:23,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:23,285 INFO L124 PetriNetUnfolderBase]: 993/1656 cut-off events. [2024-06-03 20:42:23,285 INFO L125 PetriNetUnfolderBase]: For 18270/18270 co-relation queries the response was YES. [2024-06-03 20:42:23,293 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. [2024-06-03 20:42:23,302 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 87 selfloop transitions, 37 changer transitions 0/131 dead transitions. [2024-06-03 20:42:23,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 131 transitions, 1323 flow [2024-06-03 20:42:23,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:42:23,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:42:23,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-03 20:42:23,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5918367346938775 [2024-06-03 20:42:23,304 INFO L175 Difference]: Start difference. First operand has 97 places, 100 transitions, 913 flow. Second operand 7 states and 174 transitions. [2024-06-03 20:42:23,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 131 transitions, 1323 flow [2024-06-03 20:42:23,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 131 transitions, 1253 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-03 20:42:23,330 INFO L231 Difference]: Finished difference. Result has 98 places, 103 transitions, 959 flow [2024-06-03 20:42:23,331 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} [2024-06-03 20:42:23,331 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-03 20:42:23,332 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 103 transitions, 959 flow [2024-06-03 20:42:23,332 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) [2024-06-03 20:42:23,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:23,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:23,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 20:42:23,333 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)] === [2024-06-03 20:42:23,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:23,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1454963851, now seen corresponding path program 3 times [2024-06-03 20:42:23,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:23,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910362527] [2024-06-03 20:42:23,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:23,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:23,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:23,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:23,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:23,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910362527] [2024-06-03 20:42:23,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910362527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:23,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:23,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:42:23,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765427894] [2024-06-03 20:42:23,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:23,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:42:23,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:23,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:42:23,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:42:23,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:23,610 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) [2024-06-03 20:42:23,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:23,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:23,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:23,872 INFO L124 PetriNetUnfolderBase]: 1020/1705 cut-off events. [2024-06-03 20:42:23,872 INFO L125 PetriNetUnfolderBase]: For 20837/20837 co-relation queries the response was YES. [2024-06-03 20:42:23,880 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. [2024-06-03 20:42:23,889 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 85 selfloop transitions, 43 changer transitions 0/135 dead transitions. [2024-06-03 20:42:23,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 135 transitions, 1483 flow [2024-06-03 20:42:23,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:42:23,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:42:23,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-03 20:42:23,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6150793650793651 [2024-06-03 20:42:23,891 INFO L175 Difference]: Start difference. First operand has 98 places, 103 transitions, 959 flow. Second operand 6 states and 155 transitions. [2024-06-03 20:42:23,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 135 transitions, 1483 flow [2024-06-03 20:42:23,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 135 transitions, 1381 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-03 20:42:23,920 INFO L231 Difference]: Finished difference. Result has 99 places, 109 transitions, 1031 flow [2024-06-03 20:42:23,920 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} [2024-06-03 20:42:23,920 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 56 predicate places. [2024-06-03 20:42:23,920 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 109 transitions, 1031 flow [2024-06-03 20:42:23,921 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) [2024-06-03 20:42:23,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:23,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:23,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 20:42:23,921 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)] === [2024-06-03 20:42:23,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:23,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1592634283, now seen corresponding path program 1 times [2024-06-03 20:42:23,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:23,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230676394] [2024-06-03 20:42:23,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:23,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:23,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:24,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:24,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:24,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230676394] [2024-06-03 20:42:24,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230676394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:24,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:24,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:42:24,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162095991] [2024-06-03 20:42:24,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:24,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:42:24,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:24,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:42:24,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:42:24,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:24,208 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) [2024-06-03 20:42:24,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:24,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:24,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:24,487 INFO L124 PetriNetUnfolderBase]: 1037/1730 cut-off events. [2024-06-03 20:42:24,488 INFO L125 PetriNetUnfolderBase]: For 23067/23067 co-relation queries the response was YES. [2024-06-03 20:42:24,496 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. [2024-06-03 20:42:24,505 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 103 selfloop transitions, 24 changer transitions 0/134 dead transitions. [2024-06-03 20:42:24,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 134 transitions, 1363 flow [2024-06-03 20:42:24,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:42:24,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:42:24,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-03 20:42:24,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-03 20:42:24,508 INFO L175 Difference]: Start difference. First operand has 99 places, 109 transitions, 1031 flow. Second operand 6 states and 149 transitions. [2024-06-03 20:42:24,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 134 transitions, 1363 flow [2024-06-03 20:42:24,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 134 transitions, 1299 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-03 20:42:24,539 INFO L231 Difference]: Finished difference. Result has 103 places, 111 transitions, 1046 flow [2024-06-03 20:42:24,539 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} [2024-06-03 20:42:24,540 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 60 predicate places. [2024-06-03 20:42:24,540 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 111 transitions, 1046 flow [2024-06-03 20:42:24,540 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) [2024-06-03 20:42:24,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:24,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:24,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 20:42:24,541 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)] === [2024-06-03 20:42:24,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:24,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1745845573, now seen corresponding path program 4 times [2024-06-03 20:42:24,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:24,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383649338] [2024-06-03 20:42:24,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:24,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:24,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:24,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:24,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:24,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383649338] [2024-06-03 20:42:24,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383649338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:24,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:24,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:42:24,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286547091] [2024-06-03 20:42:24,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:24,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:42:24,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:24,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:42:24,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:42:24,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:24,804 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) [2024-06-03 20:42:24,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:24,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:24,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:25,064 INFO L124 PetriNetUnfolderBase]: 1032/1714 cut-off events. [2024-06-03 20:42:25,064 INFO L125 PetriNetUnfolderBase]: For 25204/25208 co-relation queries the response was YES. [2024-06-03 20:42:25,072 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. [2024-06-03 20:42:25,081 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 83 selfloop transitions, 43 changer transitions 0/133 dead transitions. [2024-06-03 20:42:25,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 133 transitions, 1433 flow [2024-06-03 20:42:25,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:42:25,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:42:25,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-03 20:42:25,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-03 20:42:25,083 INFO L175 Difference]: Start difference. First operand has 103 places, 111 transitions, 1046 flow. Second operand 6 states and 149 transitions. [2024-06-03 20:42:25,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 133 transitions, 1433 flow [2024-06-03 20:42:25,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 133 transitions, 1368 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-03 20:42:25,113 INFO L231 Difference]: Finished difference. Result has 105 places, 112 transitions, 1088 flow [2024-06-03 20:42:25,113 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} [2024-06-03 20:42:25,113 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 62 predicate places. [2024-06-03 20:42:25,113 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 112 transitions, 1088 flow [2024-06-03 20:42:25,114 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) [2024-06-03 20:42:25,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:25,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:25,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 20:42:25,115 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)] === [2024-06-03 20:42:25,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:25,115 INFO L85 PathProgramCache]: Analyzing trace with hash -711248397, now seen corresponding path program 5 times [2024-06-03 20:42:25,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:25,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569495956] [2024-06-03 20:42:25,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:25,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:25,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:25,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:25,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:25,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569495956] [2024-06-03 20:42:25,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569495956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:25,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:25,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:42:25,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328664809] [2024-06-03 20:42:25,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:25,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:42:25,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:25,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:42:25,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:42:25,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:25,389 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) [2024-06-03 20:42:25,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:25,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:25,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:25,684 INFO L124 PetriNetUnfolderBase]: 1027/1692 cut-off events. [2024-06-03 20:42:25,685 INFO L125 PetriNetUnfolderBase]: For 26983/26983 co-relation queries the response was YES. [2024-06-03 20:42:25,698 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. [2024-06-03 20:42:25,709 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 82 selfloop transitions, 46 changer transitions 0/135 dead transitions. [2024-06-03 20:42:25,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 135 transitions, 1402 flow [2024-06-03 20:42:25,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:42:25,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:42:25,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-03 20:42:25,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-03 20:42:25,711 INFO L175 Difference]: Start difference. First operand has 105 places, 112 transitions, 1088 flow. Second operand 7 states and 168 transitions. [2024-06-03 20:42:25,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 135 transitions, 1402 flow [2024-06-03 20:42:25,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 135 transitions, 1324 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-03 20:42:25,747 INFO L231 Difference]: Finished difference. Result has 109 places, 112 transitions, 1110 flow [2024-06-03 20:42:25,747 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} [2024-06-03 20:42:25,748 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 66 predicate places. [2024-06-03 20:42:25,748 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 112 transitions, 1110 flow [2024-06-03 20:42:25,748 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) [2024-06-03 20:42:25,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:25,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:25,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 20:42:25,749 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)] === [2024-06-03 20:42:25,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:25,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1314596383, now seen corresponding path program 2 times [2024-06-03 20:42:25,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:25,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869330287] [2024-06-03 20:42:25,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:25,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:25,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:25,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:25,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:25,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869330287] [2024-06-03 20:42:25,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869330287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:25,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:25,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:42:25,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546683275] [2024-06-03 20:42:25,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:25,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:42:25,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:25,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:42:25,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:42:26,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:26,021 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) [2024-06-03 20:42:26,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:26,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:26,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:26,285 INFO L124 PetriNetUnfolderBase]: 1044/1749 cut-off events. [2024-06-03 20:42:26,285 INFO L125 PetriNetUnfolderBase]: For 30022/30026 co-relation queries the response was YES. [2024-06-03 20:42:26,294 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. [2024-06-03 20:42:26,305 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 104 selfloop transitions, 23 changer transitions 0/134 dead transitions. [2024-06-03 20:42:26,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 134 transitions, 1438 flow [2024-06-03 20:42:26,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:42:26,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:42:26,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-03 20:42:26,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5753968253968254 [2024-06-03 20:42:26,307 INFO L175 Difference]: Start difference. First operand has 109 places, 112 transitions, 1110 flow. Second operand 6 states and 145 transitions. [2024-06-03 20:42:26,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 134 transitions, 1438 flow [2024-06-03 20:42:26,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 134 transitions, 1336 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-03 20:42:26,348 INFO L231 Difference]: Finished difference. Result has 110 places, 114 transitions, 1089 flow [2024-06-03 20:42:26,348 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} [2024-06-03 20:42:26,348 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 67 predicate places. [2024-06-03 20:42:26,349 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 114 transitions, 1089 flow [2024-06-03 20:42:26,349 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) [2024-06-03 20:42:26,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:26,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:26,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 20:42:26,349 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)] === [2024-06-03 20:42:26,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:26,350 INFO L85 PathProgramCache]: Analyzing trace with hash -442630777, now seen corresponding path program 3 times [2024-06-03 20:42:26,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:26,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503443593] [2024-06-03 20:42:26,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:26,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:26,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:26,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:26,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:26,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503443593] [2024-06-03 20:42:26,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503443593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:26,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:26,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:42:26,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549301979] [2024-06-03 20:42:26,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:26,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:42:26,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:26,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:42:26,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:42:26,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:26,616 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) [2024-06-03 20:42:26,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:26,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:26,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:26,888 INFO L124 PetriNetUnfolderBase]: 1036/1737 cut-off events. [2024-06-03 20:42:26,889 INFO L125 PetriNetUnfolderBase]: For 31482/31486 co-relation queries the response was YES. [2024-06-03 20:42:26,896 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. [2024-06-03 20:42:26,905 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 102 selfloop transitions, 28 changer transitions 0/137 dead transitions. [2024-06-03 20:42:26,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 137 transitions, 1429 flow [2024-06-03 20:42:26,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:42:26,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:42:26,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-03 20:42:26,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-03 20:42:26,907 INFO L175 Difference]: Start difference. First operand has 110 places, 114 transitions, 1089 flow. Second operand 6 states and 146 transitions. [2024-06-03 20:42:26,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 137 transitions, 1429 flow [2024-06-03 20:42:26,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 137 transitions, 1366 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-03 20:42:26,946 INFO L231 Difference]: Finished difference. Result has 112 places, 116 transitions, 1121 flow [2024-06-03 20:42:26,946 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} [2024-06-03 20:42:26,947 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 69 predicate places. [2024-06-03 20:42:26,947 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 116 transitions, 1121 flow [2024-06-03 20:42:26,947 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) [2024-06-03 20:42:26,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:26,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:26,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 20:42:26,948 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)] === [2024-06-03 20:42:26,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:26,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1432334471, now seen corresponding path program 1 times [2024-06-03 20:42:26,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:26,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724933670] [2024-06-03 20:42:26,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:26,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:26,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:27,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:27,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:27,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724933670] [2024-06-03 20:42:27,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724933670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:27,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:27,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:42:27,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969840988] [2024-06-03 20:42:27,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:27,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:42:27,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:27,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:42:27,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:42:27,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:27,287 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) [2024-06-03 20:42:27,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:27,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:27,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:27,547 INFO L124 PetriNetUnfolderBase]: 1041/1745 cut-off events. [2024-06-03 20:42:27,548 INFO L125 PetriNetUnfolderBase]: For 32861/32861 co-relation queries the response was YES. [2024-06-03 20:42:27,556 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. [2024-06-03 20:42:27,565 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 111 selfloop transitions, 13 changer transitions 0/131 dead transitions. [2024-06-03 20:42:27,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 131 transitions, 1433 flow [2024-06-03 20:42:27,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:42:27,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:42:27,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-03 20:42:27,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5619047619047619 [2024-06-03 20:42:27,567 INFO L175 Difference]: Start difference. First operand has 112 places, 116 transitions, 1121 flow. Second operand 5 states and 118 transitions. [2024-06-03 20:42:27,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 131 transitions, 1433 flow [2024-06-03 20:42:27,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 131 transitions, 1356 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-03 20:42:27,611 INFO L231 Difference]: Finished difference. Result has 113 places, 119 transitions, 1116 flow [2024-06-03 20:42:27,611 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} [2024-06-03 20:42:27,612 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 70 predicate places. [2024-06-03 20:42:27,612 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 119 transitions, 1116 flow [2024-06-03 20:42:27,613 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) [2024-06-03 20:42:27,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:27,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:27,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 20:42:27,614 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)] === [2024-06-03 20:42:27,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:27,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1815378261, now seen corresponding path program 2 times [2024-06-03 20:42:27,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:27,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534640906] [2024-06-03 20:42:27,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:27,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:27,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:27,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:27,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:27,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534640906] [2024-06-03 20:42:27,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534640906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:27,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:27,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:42:27,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463228333] [2024-06-03 20:42:27,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:27,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:42:27,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:27,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:42:27,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:42:27,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:27,946 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) [2024-06-03 20:42:27,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:27,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:27,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:28,184 INFO L124 PetriNetUnfolderBase]: 1046/1747 cut-off events. [2024-06-03 20:42:28,184 INFO L125 PetriNetUnfolderBase]: For 34245/34245 co-relation queries the response was YES. [2024-06-03 20:42:28,190 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. [2024-06-03 20:42:28,197 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 116 selfloop transitions, 18 changer transitions 0/141 dead transitions. [2024-06-03 20:42:28,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 141 transitions, 1544 flow [2024-06-03 20:42:28,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:42:28,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:42:28,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-03 20:42:28,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5904761904761905 [2024-06-03 20:42:28,200 INFO L175 Difference]: Start difference. First operand has 113 places, 119 transitions, 1116 flow. Second operand 5 states and 124 transitions. [2024-06-03 20:42:28,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 141 transitions, 1544 flow [2024-06-03 20:42:28,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 141 transitions, 1494 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-03 20:42:28,246 INFO L231 Difference]: Finished difference. Result has 116 places, 125 transitions, 1202 flow [2024-06-03 20:42:28,246 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} [2024-06-03 20:42:28,246 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 73 predicate places. [2024-06-03 20:42:28,247 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 125 transitions, 1202 flow [2024-06-03 20:42:28,247 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) [2024-06-03 20:42:28,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:28,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:28,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 20:42:28,248 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)] === [2024-06-03 20:42:28,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:28,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1836556511, now seen corresponding path program 1 times [2024-06-03 20:42:28,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:28,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630275555] [2024-06-03 20:42:28,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:28,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:28,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:28,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:28,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:28,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630275555] [2024-06-03 20:42:28,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630275555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:28,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:28,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:42:28,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957530122] [2024-06-03 20:42:28,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:28,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:42:28,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:28,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:42:28,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:42:28,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:28,564 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) [2024-06-03 20:42:28,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:28,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:28,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:28,930 INFO L124 PetriNetUnfolderBase]: 1450/2395 cut-off events. [2024-06-03 20:42:28,930 INFO L125 PetriNetUnfolderBase]: For 63815/63815 co-relation queries the response was YES. [2024-06-03 20:42:28,937 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. [2024-06-03 20:42:28,946 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 132 selfloop transitions, 40 changer transitions 0/179 dead transitions. [2024-06-03 20:42:28,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 179 transitions, 1900 flow [2024-06-03 20:42:28,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:42:28,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:42:28,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-03 20:42:28,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6369047619047619 [2024-06-03 20:42:28,948 INFO L175 Difference]: Start difference. First operand has 116 places, 125 transitions, 1202 flow. Second operand 8 states and 214 transitions. [2024-06-03 20:42:28,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 179 transitions, 1900 flow [2024-06-03 20:42:29,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 179 transitions, 1854 flow, removed 20 selfloop flow, removed 1 redundant places. [2024-06-03 20:42:29,034 INFO L231 Difference]: Finished difference. Result has 124 places, 132 transitions, 1366 flow [2024-06-03 20:42:29,034 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} [2024-06-03 20:42:29,034 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 81 predicate places. [2024-06-03 20:42:29,035 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 132 transitions, 1366 flow [2024-06-03 20:42:29,035 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) [2024-06-03 20:42:29,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:29,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:29,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 20:42:29,035 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)] === [2024-06-03 20:42:29,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:29,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1866843391, now seen corresponding path program 2 times [2024-06-03 20:42:29,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:29,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116821220] [2024-06-03 20:42:29,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:29,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:29,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:29,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:29,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:29,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116821220] [2024-06-03 20:42:29,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116821220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:29,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:29,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:42:29,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966623436] [2024-06-03 20:42:29,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:29,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:42:29,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:29,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:42:29,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:42:29,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:29,344 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) [2024-06-03 20:42:29,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:29,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:29,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:29,832 INFO L124 PetriNetUnfolderBase]: 1419/2350 cut-off events. [2024-06-03 20:42:29,832 INFO L125 PetriNetUnfolderBase]: For 65353/65353 co-relation queries the response was YES. [2024-06-03 20:42:29,844 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. [2024-06-03 20:42:29,855 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 128 selfloop transitions, 38 changer transitions 0/173 dead transitions. [2024-06-03 20:42:29,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 173 transitions, 1872 flow [2024-06-03 20:42:29,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:42:29,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:42:29,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-03 20:42:29,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6130952380952381 [2024-06-03 20:42:29,857 INFO L175 Difference]: Start difference. First operand has 124 places, 132 transitions, 1366 flow. Second operand 8 states and 206 transitions. [2024-06-03 20:42:29,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 173 transitions, 1872 flow [2024-06-03 20:42:29,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 173 transitions, 1776 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-03 20:42:29,958 INFO L231 Difference]: Finished difference. Result has 128 places, 135 transitions, 1422 flow [2024-06-03 20:42:29,959 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} [2024-06-03 20:42:29,959 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 85 predicate places. [2024-06-03 20:42:29,959 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 135 transitions, 1422 flow [2024-06-03 20:42:29,960 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) [2024-06-03 20:42:29,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:29,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:29,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 20:42:29,960 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)] === [2024-06-03 20:42:29,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:29,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1982134561, now seen corresponding path program 3 times [2024-06-03 20:42:29,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:29,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483826948] [2024-06-03 20:42:29,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:29,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:29,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:30,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:30,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:30,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483826948] [2024-06-03 20:42:30,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483826948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:30,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:30,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:42:30,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913419055] [2024-06-03 20:42:30,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:30,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:42:30,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:30,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:42:30,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:42:30,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:30,257 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) [2024-06-03 20:42:30,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:30,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:30,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:30,602 INFO L124 PetriNetUnfolderBase]: 1436/2379 cut-off events. [2024-06-03 20:42:30,602 INFO L125 PetriNetUnfolderBase]: For 67704/67704 co-relation queries the response was YES. [2024-06-03 20:42:30,610 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. [2024-06-03 20:42:30,616 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 111 selfloop transitions, 46 changer transitions 0/164 dead transitions. [2024-06-03 20:42:30,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 164 transitions, 1848 flow [2024-06-03 20:42:30,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:42:30,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:42:30,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-03 20:42:30,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5850340136054422 [2024-06-03 20:42:30,618 INFO L175 Difference]: Start difference. First operand has 128 places, 135 transitions, 1422 flow. Second operand 7 states and 172 transitions. [2024-06-03 20:42:30,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 164 transitions, 1848 flow [2024-06-03 20:42:30,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 164 transitions, 1740 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-03 20:42:30,701 INFO L231 Difference]: Finished difference. Result has 129 places, 137 transitions, 1461 flow [2024-06-03 20:42:30,701 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} [2024-06-03 20:42:30,702 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-03 20:42:30,702 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 137 transitions, 1461 flow [2024-06-03 20:42:30,702 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) [2024-06-03 20:42:30,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:30,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:30,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 20:42:30,703 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)] === [2024-06-03 20:42:30,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:30,703 INFO L85 PathProgramCache]: Analyzing trace with hash -573867463, now seen corresponding path program 4 times [2024-06-03 20:42:30,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:30,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376084522] [2024-06-03 20:42:30,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:30,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:30,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:30,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:30,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:30,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376084522] [2024-06-03 20:42:30,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376084522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:30,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:30,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:42:30,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45453953] [2024-06-03 20:42:30,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:30,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:42:30,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:30,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:42:30,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:42:30,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:30,985 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) [2024-06-03 20:42:30,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:30,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:30,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:31,270 INFO L124 PetriNetUnfolderBase]: 1428/2340 cut-off events. [2024-06-03 20:42:31,270 INFO L125 PetriNetUnfolderBase]: For 70573/70573 co-relation queries the response was YES. [2024-06-03 20:42:31,278 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. [2024-06-03 20:42:31,285 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 108 selfloop transitions, 48 changer transitions 0/163 dead transitions. [2024-06-03 20:42:31,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 163 transitions, 1881 flow [2024-06-03 20:42:31,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:42:31,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:42:31,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-03 20:42:31,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-03 20:42:31,286 INFO L175 Difference]: Start difference. First operand has 129 places, 137 transitions, 1461 flow. Second operand 7 states and 168 transitions. [2024-06-03 20:42:31,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 163 transitions, 1881 flow [2024-06-03 20:42:31,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 163 transitions, 1752 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-03 20:42:31,392 INFO L231 Difference]: Finished difference. Result has 131 places, 139 transitions, 1487 flow [2024-06-03 20:42:31,392 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} [2024-06-03 20:42:31,393 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 88 predicate places. [2024-06-03 20:42:31,393 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 139 transitions, 1487 flow [2024-06-03 20:42:31,393 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) [2024-06-03 20:42:31,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:31,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:31,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 20:42:31,394 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)] === [2024-06-03 20:42:31,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:31,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1474138796, now seen corresponding path program 1 times [2024-06-03 20:42:31,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:31,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5809861] [2024-06-03 20:42:31,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:31,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:31,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:31,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:31,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:31,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5809861] [2024-06-03 20:42:31,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5809861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:31,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:31,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:42:31,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289925756] [2024-06-03 20:42:31,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:31,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:42:31,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:31,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:42:31,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:42:31,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:31,725 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) [2024-06-03 20:42:31,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:31,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:31,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:32,046 INFO L124 PetriNetUnfolderBase]: 1433/2377 cut-off events. [2024-06-03 20:42:32,046 INFO L125 PetriNetUnfolderBase]: For 73456/73460 co-relation queries the response was YES. [2024-06-03 20:42:32,055 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. [2024-06-03 20:42:32,062 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 135 selfloop transitions, 12 changer transitions 0/154 dead transitions. [2024-06-03 20:42:32,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 154 transitions, 1853 flow [2024-06-03 20:42:32,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:42:32,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:42:32,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-03 20:42:32,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5619047619047619 [2024-06-03 20:42:32,064 INFO L175 Difference]: Start difference. First operand has 131 places, 139 transitions, 1487 flow. Second operand 5 states and 118 transitions. [2024-06-03 20:42:32,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 154 transitions, 1853 flow [2024-06-03 20:42:32,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 154 transitions, 1716 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-03 20:42:32,139 INFO L231 Difference]: Finished difference. Result has 131 places, 142 transitions, 1428 flow [2024-06-03 20:42:32,139 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} [2024-06-03 20:42:32,140 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 88 predicate places. [2024-06-03 20:42:32,140 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 142 transitions, 1428 flow [2024-06-03 20:42:32,140 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) [2024-06-03 20:42:32,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:32,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:32,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 20:42:32,141 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)] === [2024-06-03 20:42:32,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:32,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1452694708, now seen corresponding path program 2 times [2024-06-03 20:42:32,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:32,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033533994] [2024-06-03 20:42:32,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:32,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:32,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:32,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:32,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:32,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033533994] [2024-06-03 20:42:32,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033533994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:32,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:32,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:42:32,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17414310] [2024-06-03 20:42:32,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:32,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:42:32,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:32,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:42:32,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:42:32,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:32,509 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) [2024-06-03 20:42:32,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:32,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:32,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:32,807 INFO L124 PetriNetUnfolderBase]: 1430/2369 cut-off events. [2024-06-03 20:42:32,808 INFO L125 PetriNetUnfolderBase]: For 75744/75744 co-relation queries the response was YES. [2024-06-03 20:42:32,817 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. [2024-06-03 20:42:32,824 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 135 selfloop transitions, 16 changer transitions 0/158 dead transitions. [2024-06-03 20:42:32,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 158 transitions, 1810 flow [2024-06-03 20:42:32,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:42:32,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:42:32,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-03 20:42:32,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396825396825397 [2024-06-03 20:42:32,825 INFO L175 Difference]: Start difference. First operand has 131 places, 142 transitions, 1428 flow. Second operand 6 states and 136 transitions. [2024-06-03 20:42:32,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 158 transitions, 1810 flow [2024-06-03 20:42:32,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 158 transitions, 1754 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-03 20:42:32,900 INFO L231 Difference]: Finished difference. Result has 134 places, 145 transitions, 1464 flow [2024-06-03 20:42:32,900 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} [2024-06-03 20:42:32,901 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 91 predicate places. [2024-06-03 20:42:32,901 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 145 transitions, 1464 flow [2024-06-03 20:42:32,901 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) [2024-06-03 20:42:32,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:32,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:32,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 20:42:32,902 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)] === [2024-06-03 20:42:32,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:32,902 INFO L85 PathProgramCache]: Analyzing trace with hash 513206102, now seen corresponding path program 1 times [2024-06-03 20:42:32,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:32,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344213035] [2024-06-03 20:42:32,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:32,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:32,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:33,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:33,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:33,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344213035] [2024-06-03 20:42:33,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344213035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:33,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:33,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:42:33,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556366786] [2024-06-03 20:42:33,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:33,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:42:33,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:33,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:42:33,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:42:33,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:33,199 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) [2024-06-03 20:42:33,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:33,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:33,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:33,487 INFO L124 PetriNetUnfolderBase]: 1458/2421 cut-off events. [2024-06-03 20:42:33,488 INFO L125 PetriNetUnfolderBase]: For 83571/83571 co-relation queries the response was YES. [2024-06-03 20:42:33,497 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. [2024-06-03 20:42:33,504 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 128 selfloop transitions, 48 changer transitions 0/183 dead transitions. [2024-06-03 20:42:33,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 183 transitions, 2334 flow [2024-06-03 20:42:33,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:42:33,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:42:33,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-03 20:42:33,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5505952380952381 [2024-06-03 20:42:33,505 INFO L175 Difference]: Start difference. First operand has 134 places, 145 transitions, 1464 flow. Second operand 8 states and 185 transitions. [2024-06-03 20:42:33,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 183 transitions, 2334 flow [2024-06-03 20:42:33,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 183 transitions, 2264 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-03 20:42:33,583 INFO L231 Difference]: Finished difference. Result has 140 places, 161 transitions, 1766 flow [2024-06-03 20:42:33,583 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} [2024-06-03 20:42:33,584 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 97 predicate places. [2024-06-03 20:42:33,584 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 161 transitions, 1766 flow [2024-06-03 20:42:33,584 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) [2024-06-03 20:42:33,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:33,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:33,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 20:42:33,585 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)] === [2024-06-03 20:42:33,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:33,585 INFO L85 PathProgramCache]: Analyzing trace with hash 517847546, now seen corresponding path program 3 times [2024-06-03 20:42:33,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:33,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563530960] [2024-06-03 20:42:33,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:33,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:33,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:33,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:33,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:33,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563530960] [2024-06-03 20:42:33,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563530960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:33,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:33,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:42:33,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186637186] [2024-06-03 20:42:33,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:33,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:42:33,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:33,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:42:33,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:42:33,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:33,915 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) [2024-06-03 20:42:33,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:33,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:33,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:34,184 INFO L124 PetriNetUnfolderBase]: 1455/2410 cut-off events. [2024-06-03 20:42:34,184 INFO L125 PetriNetUnfolderBase]: For 87813/87813 co-relation queries the response was YES. [2024-06-03 20:42:34,194 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. [2024-06-03 20:42:34,201 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 151 selfloop transitions, 18 changer transitions 0/176 dead transitions. [2024-06-03 20:42:34,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 176 transitions, 2142 flow [2024-06-03 20:42:34,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:42:34,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:42:34,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-03 20:42:34,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-03 20:42:34,202 INFO L175 Difference]: Start difference. First operand has 140 places, 161 transitions, 1766 flow. Second operand 5 states and 123 transitions. [2024-06-03 20:42:34,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 176 transitions, 2142 flow [2024-06-03 20:42:34,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 176 transitions, 2013 flow, removed 51 selfloop flow, removed 2 redundant places. [2024-06-03 20:42:34,294 INFO L231 Difference]: Finished difference. Result has 143 places, 161 transitions, 1683 flow [2024-06-03 20:42:34,294 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} [2024-06-03 20:42:34,295 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 100 predicate places. [2024-06-03 20:42:34,295 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 161 transitions, 1683 flow [2024-06-03 20:42:34,295 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) [2024-06-03 20:42:34,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:34,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:34,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 20:42:34,296 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)] === [2024-06-03 20:42:34,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:34,296 INFO L85 PathProgramCache]: Analyzing trace with hash 237984916, now seen corresponding path program 2 times [2024-06-03 20:42:34,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:34,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671419035] [2024-06-03 20:42:34,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:34,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:34,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:34,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:34,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:34,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671419035] [2024-06-03 20:42:34,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671419035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:34,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:34,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:42:34,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542562582] [2024-06-03 20:42:34,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:34,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:42:34,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:34,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:42:34,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:42:34,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:34,598 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) [2024-06-03 20:42:34,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:34,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:34,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:34,995 INFO L124 PetriNetUnfolderBase]: 1526/2533 cut-off events. [2024-06-03 20:42:34,996 INFO L125 PetriNetUnfolderBase]: For 96915/96915 co-relation queries the response was YES. [2024-06-03 20:42:35,012 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. [2024-06-03 20:42:35,023 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 123 selfloop transitions, 70 changer transitions 0/200 dead transitions. [2024-06-03 20:42:35,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 200 transitions, 2576 flow [2024-06-03 20:42:35,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:42:35,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:42:35,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-03 20:42:35,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5816326530612245 [2024-06-03 20:42:35,026 INFO L175 Difference]: Start difference. First operand has 143 places, 161 transitions, 1683 flow. Second operand 7 states and 171 transitions. [2024-06-03 20:42:35,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 200 transitions, 2576 flow [2024-06-03 20:42:35,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 200 transitions, 2521 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-03 20:42:35,144 INFO L231 Difference]: Finished difference. Result has 147 places, 181 transitions, 2130 flow [2024-06-03 20:42:35,144 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} [2024-06-03 20:42:35,144 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 104 predicate places. [2024-06-03 20:42:35,144 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 181 transitions, 2130 flow [2024-06-03 20:42:35,145 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) [2024-06-03 20:42:35,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:35,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:35,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 20:42:35,145 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)] === [2024-06-03 20:42:35,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:35,145 INFO L85 PathProgramCache]: Analyzing trace with hash 222784996, now seen corresponding path program 3 times [2024-06-03 20:42:35,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:35,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231828641] [2024-06-03 20:42:35,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:35,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:35,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:35,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:35,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:35,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231828641] [2024-06-03 20:42:35,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231828641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:35,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:35,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:42:35,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444090561] [2024-06-03 20:42:35,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:35,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:42:35,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:35,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:42:35,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:42:35,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:35,451 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) [2024-06-03 20:42:35,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:35,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:35,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:35,780 INFO L124 PetriNetUnfolderBase]: 1519/2527 cut-off events. [2024-06-03 20:42:35,780 INFO L125 PetriNetUnfolderBase]: For 103352/103352 co-relation queries the response was YES. [2024-06-03 20:42:35,792 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. [2024-06-03 20:42:35,802 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 125 selfloop transitions, 74 changer transitions 0/206 dead transitions. [2024-06-03 20:42:35,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 206 transitions, 2854 flow [2024-06-03 20:42:35,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:42:35,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:42:35,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-03 20:42:35,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-03 20:42:35,804 INFO L175 Difference]: Start difference. First operand has 147 places, 181 transitions, 2130 flow. Second operand 6 states and 154 transitions. [2024-06-03 20:42:35,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 206 transitions, 2854 flow [2024-06-03 20:42:35,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 206 transitions, 2671 flow, removed 73 selfloop flow, removed 3 redundant places. [2024-06-03 20:42:35,917 INFO L231 Difference]: Finished difference. Result has 151 places, 187 transitions, 2282 flow [2024-06-03 20:42:35,917 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} [2024-06-03 20:42:35,917 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 108 predicate places. [2024-06-03 20:42:35,918 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 187 transitions, 2282 flow [2024-06-03 20:42:35,918 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) [2024-06-03 20:42:35,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:35,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:35,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 20:42:35,918 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)] === [2024-06-03 20:42:35,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:35,919 INFO L85 PathProgramCache]: Analyzing trace with hash 223031074, now seen corresponding path program 1 times [2024-06-03 20:42:35,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:35,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363011651] [2024-06-03 20:42:35,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:35,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:35,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:36,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:36,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:36,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363011651] [2024-06-03 20:42:36,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363011651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:36,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:36,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:42:36,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588392367] [2024-06-03 20:42:36,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:36,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:42:36,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:36,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:42:36,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:42:36,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-03 20:42:36,201 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) [2024-06-03 20:42:36,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:36,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-03 20:42:36,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:36,493 INFO L124 PetriNetUnfolderBase]: 1485/2501 cut-off events. [2024-06-03 20:42:36,494 INFO L125 PetriNetUnfolderBase]: For 113390/113390 co-relation queries the response was YES. [2024-06-03 20:42:36,504 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. [2024-06-03 20:42:36,513 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 155 selfloop transitions, 22 changer transitions 0/202 dead transitions. [2024-06-03 20:42:36,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 202 transitions, 2710 flow [2024-06-03 20:42:36,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:42:36,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:42:36,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-03 20:42:36,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-03 20:42:36,514 INFO L175 Difference]: Start difference. First operand has 151 places, 187 transitions, 2282 flow. Second operand 5 states and 125 transitions. [2024-06-03 20:42:36,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 202 transitions, 2710 flow [2024-06-03 20:42:36,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 202 transitions, 2573 flow, removed 35 selfloop flow, removed 2 redundant places. [2024-06-03 20:42:36,650 INFO L231 Difference]: Finished difference. Result has 154 places, 189 transitions, 2228 flow [2024-06-03 20:42:36,650 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} [2024-06-03 20:42:36,651 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-03 20:42:36,651 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 189 transitions, 2228 flow [2024-06-03 20:42:36,651 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) [2024-06-03 20:42:36,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:36,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:36,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 20:42:36,651 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)] === [2024-06-03 20:42:36,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:36,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1753294578, now seen corresponding path program 1 times [2024-06-03 20:42:36,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:36,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891645630] [2024-06-03 20:42:36,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:36,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:36,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:36,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:36,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:36,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891645630] [2024-06-03 20:42:36,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891645630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:36,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:36,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:42:36,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143266945] [2024-06-03 20:42:36,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:36,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:42:36,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:36,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:42:36,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:42:36,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:36,916 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) [2024-06-03 20:42:36,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:36,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:36,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:37,364 INFO L124 PetriNetUnfolderBase]: 1679/2817 cut-off events. [2024-06-03 20:42:37,364 INFO L125 PetriNetUnfolderBase]: For 136836/136836 co-relation queries the response was YES. [2024-06-03 20:42:37,377 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. [2024-06-03 20:42:37,386 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 183 selfloop transitions, 44 changer transitions 5/239 dead transitions. [2024-06-03 20:42:37,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 239 transitions, 3043 flow [2024-06-03 20:42:37,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:42:37,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:42:37,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-03 20:42:37,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6398809523809523 [2024-06-03 20:42:37,387 INFO L175 Difference]: Start difference. First operand has 154 places, 189 transitions, 2228 flow. Second operand 8 states and 215 transitions. [2024-06-03 20:42:37,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 239 transitions, 3043 flow [2024-06-03 20:42:37,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 239 transitions, 2984 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-03 20:42:37,576 INFO L231 Difference]: Finished difference. Result has 159 places, 189 transitions, 2278 flow [2024-06-03 20:42:37,576 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} [2024-06-03 20:42:37,576 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 116 predicate places. [2024-06-03 20:42:37,576 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 189 transitions, 2278 flow [2024-06-03 20:42:37,577 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) [2024-06-03 20:42:37,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:37,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:37,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 20:42:37,580 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)] === [2024-06-03 20:42:37,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:37,580 INFO L85 PathProgramCache]: Analyzing trace with hash -537400354, now seen corresponding path program 2 times [2024-06-03 20:42:37,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:37,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988640274] [2024-06-03 20:42:37,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:37,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:37,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:37,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:37,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:37,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988640274] [2024-06-03 20:42:37,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988640274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:37,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:37,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:42:37,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531245906] [2024-06-03 20:42:37,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:37,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:42:37,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:37,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:42:37,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:42:37,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:37,884 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) [2024-06-03 20:42:37,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:37,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:37,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:38,417 INFO L124 PetriNetUnfolderBase]: 1534/2586 cut-off events. [2024-06-03 20:42:38,417 INFO L125 PetriNetUnfolderBase]: For 117394/117394 co-relation queries the response was YES. [2024-06-03 20:42:38,430 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. [2024-06-03 20:42:38,439 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 184 selfloop transitions, 36 changer transitions 3/230 dead transitions. [2024-06-03 20:42:38,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 230 transitions, 2892 flow [2024-06-03 20:42:38,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:42:38,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:42:38,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-03 20:42:38,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6101190476190477 [2024-06-03 20:42:38,441 INFO L175 Difference]: Start difference. First operand has 159 places, 189 transitions, 2278 flow. Second operand 8 states and 205 transitions. [2024-06-03 20:42:38,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 230 transitions, 2892 flow [2024-06-03 20:42:38,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 230 transitions, 2771 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-03 20:42:38,594 INFO L231 Difference]: Finished difference. Result has 162 places, 189 transitions, 2251 flow [2024-06-03 20:42:38,594 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} [2024-06-03 20:42:38,595 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 119 predicate places. [2024-06-03 20:42:38,595 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 189 transitions, 2251 flow [2024-06-03 20:42:38,595 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) [2024-06-03 20:42:38,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:38,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:38,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 20:42:38,595 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)] === [2024-06-03 20:42:38,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:38,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1505598538, now seen corresponding path program 3 times [2024-06-03 20:42:38,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:38,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639445161] [2024-06-03 20:42:38,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:38,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:38,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:38,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:38,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:38,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639445161] [2024-06-03 20:42:38,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639445161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:38,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:38,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:42:38,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828209573] [2024-06-03 20:42:38,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:38,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:42:38,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:38,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:42:38,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:42:38,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:38,845 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) [2024-06-03 20:42:38,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:38,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:38,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:39,225 INFO L124 PetriNetUnfolderBase]: 1582/2680 cut-off events. [2024-06-03 20:42:39,225 INFO L125 PetriNetUnfolderBase]: For 100809/100809 co-relation queries the response was YES. [2024-06-03 20:42:39,238 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. [2024-06-03 20:42:39,245 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 168 selfloop transitions, 45 changer transitions 0/220 dead transitions. [2024-06-03 20:42:39,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 220 transitions, 2801 flow [2024-06-03 20:42:39,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:42:39,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:42:39,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-03 20:42:39,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5918367346938775 [2024-06-03 20:42:39,246 INFO L175 Difference]: Start difference. First operand has 162 places, 189 transitions, 2251 flow. Second operand 7 states and 174 transitions. [2024-06-03 20:42:39,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 220 transitions, 2801 flow [2024-06-03 20:42:39,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 220 transitions, 2729 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-03 20:42:39,370 INFO L231 Difference]: Finished difference. Result has 163 places, 190 transitions, 2304 flow [2024-06-03 20:42:39,371 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} [2024-06-03 20:42:39,371 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 120 predicate places. [2024-06-03 20:42:39,371 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 190 transitions, 2304 flow [2024-06-03 20:42:39,371 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) [2024-06-03 20:42:39,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:39,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:39,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-03 20:42:39,372 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)] === [2024-06-03 20:42:39,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:39,372 INFO L85 PathProgramCache]: Analyzing trace with hash 459263530, now seen corresponding path program 4 times [2024-06-03 20:42:39,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:39,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651942002] [2024-06-03 20:42:39,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:39,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:39,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:39,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:39,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:39,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651942002] [2024-06-03 20:42:39,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651942002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:39,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:39,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:42:39,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396124822] [2024-06-03 20:42:39,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:39,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:42:39,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:39,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:42:39,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:42:39,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:39,676 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) [2024-06-03 20:42:39,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:39,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:39,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:40,027 INFO L124 PetriNetUnfolderBase]: 1640/2790 cut-off events. [2024-06-03 20:42:40,027 INFO L125 PetriNetUnfolderBase]: For 107475/107475 co-relation queries the response was YES. [2024-06-03 20:42:40,041 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. [2024-06-03 20:42:40,050 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 173 selfloop transitions, 45 changer transitions 0/225 dead transitions. [2024-06-03 20:42:40,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 225 transitions, 2876 flow [2024-06-03 20:42:40,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:42:40,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:42:40,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-03 20:42:40,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5803571428571429 [2024-06-03 20:42:40,051 INFO L175 Difference]: Start difference. First operand has 163 places, 190 transitions, 2304 flow. Second operand 8 states and 195 transitions. [2024-06-03 20:42:40,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 225 transitions, 2876 flow [2024-06-03 20:42:40,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 225 transitions, 2769 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-03 20:42:40,238 INFO L231 Difference]: Finished difference. Result has 166 places, 191 transitions, 2324 flow [2024-06-03 20:42:40,239 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} [2024-06-03 20:42:40,239 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 123 predicate places. [2024-06-03 20:42:40,239 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 191 transitions, 2324 flow [2024-06-03 20:42:40,239 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) [2024-06-03 20:42:40,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:40,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:40,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-03 20:42:40,240 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)] === [2024-06-03 20:42:40,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:40,240 INFO L85 PathProgramCache]: Analyzing trace with hash -2138490898, now seen corresponding path program 5 times [2024-06-03 20:42:40,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:40,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317953213] [2024-06-03 20:42:40,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:40,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:40,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:40,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:40,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:40,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317953213] [2024-06-03 20:42:40,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317953213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:40,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:40,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:42:40,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262468439] [2024-06-03 20:42:40,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:40,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:42:40,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:40,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:42:40,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:42:40,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:40,536 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) [2024-06-03 20:42:40,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:40,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:40,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:40,966 INFO L124 PetriNetUnfolderBase]: 1681/2861 cut-off events. [2024-06-03 20:42:40,966 INFO L125 PetriNetUnfolderBase]: For 110285/110285 co-relation queries the response was YES. [2024-06-03 20:42:40,981 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. [2024-06-03 20:42:40,991 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 178 selfloop transitions, 48 changer transitions 0/233 dead transitions. [2024-06-03 20:42:40,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 233 transitions, 2946 flow [2024-06-03 20:42:40,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:42:40,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:42:40,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-03 20:42:40,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5767195767195767 [2024-06-03 20:42:40,992 INFO L175 Difference]: Start difference. First operand has 166 places, 191 transitions, 2324 flow. Second operand 9 states and 218 transitions. [2024-06-03 20:42:40,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 233 transitions, 2946 flow [2024-06-03 20:42:41,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 233 transitions, 2837 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-03 20:42:41,145 INFO L231 Difference]: Finished difference. Result has 169 places, 192 transitions, 2349 flow [2024-06-03 20:42:41,146 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} [2024-06-03 20:42:41,146 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-03 20:42:41,146 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 192 transitions, 2349 flow [2024-06-03 20:42:41,146 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) [2024-06-03 20:42:41,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:41,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:41,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-03 20:42:41,147 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)] === [2024-06-03 20:42:41,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:41,147 INFO L85 PathProgramCache]: Analyzing trace with hash 928483080, now seen corresponding path program 1 times [2024-06-03 20:42:41,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:41,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107362779] [2024-06-03 20:42:41,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:41,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:41,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:41,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:41,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:41,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107362779] [2024-06-03 20:42:41,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107362779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:41,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:41,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:42:41,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039873423] [2024-06-03 20:42:41,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:41,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:42:41,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:41,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:42:41,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:42:41,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:41,413 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) [2024-06-03 20:42:41,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:41,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:41,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:41,817 INFO L124 PetriNetUnfolderBase]: 1808/3094 cut-off events. [2024-06-03 20:42:41,817 INFO L125 PetriNetUnfolderBase]: For 127797/127797 co-relation queries the response was YES. [2024-06-03 20:42:41,831 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. [2024-06-03 20:42:41,840 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 172 selfloop transitions, 50 changer transitions 0/229 dead transitions. [2024-06-03 20:42:41,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 229 transitions, 3113 flow [2024-06-03 20:42:41,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:42:41,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:42:41,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-03 20:42:41,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6054421768707483 [2024-06-03 20:42:41,842 INFO L175 Difference]: Start difference. First operand has 169 places, 192 transitions, 2349 flow. Second operand 7 states and 178 transitions. [2024-06-03 20:42:41,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 229 transitions, 3113 flow [2024-06-03 20:42:42,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 229 transitions, 2993 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-03 20:42:42,031 INFO L231 Difference]: Finished difference. Result has 169 places, 194 transitions, 2401 flow [2024-06-03 20:42:42,031 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} [2024-06-03 20:42:42,031 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-03 20:42:42,032 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 194 transitions, 2401 flow [2024-06-03 20:42:42,032 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) [2024-06-03 20:42:42,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:42,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:42,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-03 20:42:42,032 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)] === [2024-06-03 20:42:42,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:42,033 INFO L85 PathProgramCache]: Analyzing trace with hash -689188672, now seen corresponding path program 1 times [2024-06-03 20:42:42,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:42,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004366989] [2024-06-03 20:42:42,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:42,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:42,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:42,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:42,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:42,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004366989] [2024-06-03 20:42:42,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004366989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:42,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:42,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:42:42,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933097507] [2024-06-03 20:42:42,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:42,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:42:42,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:42,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:42:42,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:42:42,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:42,328 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) [2024-06-03 20:42:42,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:42,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:42,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:42,732 INFO L124 PetriNetUnfolderBase]: 1837/3111 cut-off events. [2024-06-03 20:42:42,732 INFO L125 PetriNetUnfolderBase]: For 127612/127612 co-relation queries the response was YES. [2024-06-03 20:42:42,746 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. [2024-06-03 20:42:42,754 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 149 selfloop transitions, 75 changer transitions 0/231 dead transitions. [2024-06-03 20:42:42,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 231 transitions, 3391 flow [2024-06-03 20:42:42,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:42:42,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:42:42,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-03 20:42:42,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-03 20:42:42,755 INFO L175 Difference]: Start difference. First operand has 169 places, 194 transitions, 2401 flow. Second operand 9 states and 210 transitions. [2024-06-03 20:42:42,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 231 transitions, 3391 flow [2024-06-03 20:42:42,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 231 transitions, 3308 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-03 20:42:42,939 INFO L231 Difference]: Finished difference. Result has 178 places, 206 transitions, 2797 flow [2024-06-03 20:42:42,939 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} [2024-06-03 20:42:42,940 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-03 20:42:42,940 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 206 transitions, 2797 flow [2024-06-03 20:42:42,942 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) [2024-06-03 20:42:42,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:42,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:42,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-03 20:42:42,942 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)] === [2024-06-03 20:42:42,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:42,943 INFO L85 PathProgramCache]: Analyzing trace with hash -683474752, now seen corresponding path program 2 times [2024-06-03 20:42:42,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:42,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128004631] [2024-06-03 20:42:42,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:42,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:42,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:43,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:43,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:43,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128004631] [2024-06-03 20:42:43,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128004631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:43,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:43,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:42:43,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385562267] [2024-06-03 20:42:43,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:43,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:42:43,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:43,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:42:43,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:42:43,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:43,231 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) [2024-06-03 20:42:43,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:43,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:43,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:43,728 INFO L124 PetriNetUnfolderBase]: 1858/3172 cut-off events. [2024-06-03 20:42:43,728 INFO L125 PetriNetUnfolderBase]: For 133388/133388 co-relation queries the response was YES. [2024-06-03 20:42:43,744 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. [2024-06-03 20:42:43,755 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 184 selfloop transitions, 46 changer transitions 0/237 dead transitions. [2024-06-03 20:42:43,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 237 transitions, 3562 flow [2024-06-03 20:42:43,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:42:43,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:42:43,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-03 20:42:43,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.626984126984127 [2024-06-03 20:42:43,756 INFO L175 Difference]: Start difference. First operand has 178 places, 206 transitions, 2797 flow. Second operand 6 states and 158 transitions. [2024-06-03 20:42:43,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 237 transitions, 3562 flow [2024-06-03 20:42:43,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 237 transitions, 3360 flow, removed 63 selfloop flow, removed 4 redundant places. [2024-06-03 20:42:43,944 INFO L231 Difference]: Finished difference. Result has 181 places, 213 transitions, 2883 flow [2024-06-03 20:42:43,944 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} [2024-06-03 20:42:43,944 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 138 predicate places. [2024-06-03 20:42:43,944 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 213 transitions, 2883 flow [2024-06-03 20:42:43,944 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) [2024-06-03 20:42:43,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:43,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:43,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-03 20:42:43,945 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)] === [2024-06-03 20:42:43,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:43,945 INFO L85 PathProgramCache]: Analyzing trace with hash -480727646, now seen corresponding path program 6 times [2024-06-03 20:42:43,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:43,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444867285] [2024-06-03 20:42:43,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:43,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:43,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:44,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:44,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:44,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444867285] [2024-06-03 20:42:44,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444867285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:44,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:44,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:42:44,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004655939] [2024-06-03 20:42:44,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:44,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:42:44,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:44,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:42:44,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:42:44,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:44,243 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) [2024-06-03 20:42:44,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:44,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:44,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:44,665 INFO L124 PetriNetUnfolderBase]: 1830/3103 cut-off events. [2024-06-03 20:42:44,665 INFO L125 PetriNetUnfolderBase]: For 137157/137157 co-relation queries the response was YES. [2024-06-03 20:42:44,681 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. [2024-06-03 20:42:44,690 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 188 selfloop transitions, 49 changer transitions 0/244 dead transitions. [2024-06-03 20:42:44,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 244 transitions, 3457 flow [2024-06-03 20:42:44,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:42:44,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:42:44,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-03 20:42:44,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684523809523809 [2024-06-03 20:42:44,693 INFO L175 Difference]: Start difference. First operand has 181 places, 213 transitions, 2883 flow. Second operand 8 states and 191 transitions. [2024-06-03 20:42:44,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 244 transitions, 3457 flow [2024-06-03 20:42:44,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 244 transitions, 3366 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-03 20:42:44,941 INFO L231 Difference]: Finished difference. Result has 185 places, 213 transitions, 2897 flow [2024-06-03 20:42:44,941 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} [2024-06-03 20:42:44,941 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 142 predicate places. [2024-06-03 20:42:44,941 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 213 transitions, 2897 flow [2024-06-03 20:42:44,942 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) [2024-06-03 20:42:44,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:44,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:44,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-03 20:42:44,942 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)] === [2024-06-03 20:42:44,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:44,942 INFO L85 PathProgramCache]: Analyzing trace with hash -480875516, now seen corresponding path program 7 times [2024-06-03 20:42:44,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:44,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701258518] [2024-06-03 20:42:44,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:44,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:44,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:45,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:45,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:45,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701258518] [2024-06-03 20:42:45,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701258518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:45,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:45,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:42:45,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38569724] [2024-06-03 20:42:45,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:45,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:42:45,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:45,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:42:45,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:42:45,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:45,238 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) [2024-06-03 20:42:45,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:45,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:45,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:45,656 INFO L124 PetriNetUnfolderBase]: 1871/3174 cut-off events. [2024-06-03 20:42:45,656 INFO L125 PetriNetUnfolderBase]: For 141016/141016 co-relation queries the response was YES. [2024-06-03 20:42:45,672 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. [2024-06-03 20:42:45,682 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 193 selfloop transitions, 52 changer transitions 0/252 dead transitions. [2024-06-03 20:42:45,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 252 transitions, 3553 flow [2024-06-03 20:42:45,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:42:45,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:42:45,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-03 20:42:45,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5661375661375662 [2024-06-03 20:42:45,684 INFO L175 Difference]: Start difference. First operand has 185 places, 213 transitions, 2897 flow. Second operand 9 states and 214 transitions. [2024-06-03 20:42:45,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 252 transitions, 3553 flow [2024-06-03 20:42:45,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 252 transitions, 3450 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-03 20:42:45,903 INFO L231 Difference]: Finished difference. Result has 188 places, 214 transitions, 2940 flow [2024-06-03 20:42:45,903 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} [2024-06-03 20:42:45,904 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 145 predicate places. [2024-06-03 20:42:45,904 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 214 transitions, 2940 flow [2024-06-03 20:42:45,904 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) [2024-06-03 20:42:45,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:45,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:45,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-03 20:42:45,904 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)] === [2024-06-03 20:42:45,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:45,905 INFO L85 PathProgramCache]: Analyzing trace with hash -614329088, now seen corresponding path program 8 times [2024-06-03 20:42:45,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:45,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287889859] [2024-06-03 20:42:45,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:45,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:45,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:46,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:46,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:46,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287889859] [2024-06-03 20:42:46,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287889859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:46,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:46,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:42:46,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786843422] [2024-06-03 20:42:46,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:46,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:42:46,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:46,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:42:46,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:42:46,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:46,126 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) [2024-06-03 20:42:46,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:46,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:46,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:46,589 INFO L124 PetriNetUnfolderBase]: 1904/3251 cut-off events. [2024-06-03 20:42:46,589 INFO L125 PetriNetUnfolderBase]: For 148567/148571 co-relation queries the response was YES. [2024-06-03 20:42:46,604 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. [2024-06-03 20:42:46,615 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 189 selfloop transitions, 46 changer transitions 0/242 dead transitions. [2024-06-03 20:42:46,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 242 transitions, 3536 flow [2024-06-03 20:42:46,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:42:46,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:42:46,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-03 20:42:46,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2024-06-03 20:42:46,616 INFO L175 Difference]: Start difference. First operand has 188 places, 214 transitions, 2940 flow. Second operand 7 states and 170 transitions. [2024-06-03 20:42:46,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 242 transitions, 3536 flow [2024-06-03 20:42:46,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 242 transitions, 3404 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-03 20:42:46,856 INFO L231 Difference]: Finished difference. Result has 188 places, 215 transitions, 2945 flow [2024-06-03 20:42:46,857 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} [2024-06-03 20:42:46,857 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 145 predicate places. [2024-06-03 20:42:46,857 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 215 transitions, 2945 flow [2024-06-03 20:42:46,857 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) [2024-06-03 20:42:46,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:46,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:46,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-03 20:42:46,858 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)] === [2024-06-03 20:42:46,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:46,858 INFO L85 PathProgramCache]: Analyzing trace with hash -728240538, now seen corresponding path program 2 times [2024-06-03 20:42:46,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:46,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991711362] [2024-06-03 20:42:46,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:46,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:46,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:47,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:47,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:47,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991711362] [2024-06-03 20:42:47,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991711362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:47,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:47,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:42:47,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987223844] [2024-06-03 20:42:47,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:47,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:42:47,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:47,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:42:47,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:42:47,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:47,101 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) [2024-06-03 20:42:47,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:47,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:47,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:47,579 INFO L124 PetriNetUnfolderBase]: 1945/3332 cut-off events. [2024-06-03 20:42:47,579 INFO L125 PetriNetUnfolderBase]: For 151216/151220 co-relation queries the response was YES. [2024-06-03 20:42:47,596 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. [2024-06-03 20:42:47,607 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 191 selfloop transitions, 48 changer transitions 0/246 dead transitions. [2024-06-03 20:42:47,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 246 transitions, 3565 flow [2024-06-03 20:42:47,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:42:47,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:42:47,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-03 20:42:47,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-03 20:42:47,608 INFO L175 Difference]: Start difference. First operand has 188 places, 215 transitions, 2945 flow. Second operand 7 states and 173 transitions. [2024-06-03 20:42:47,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 246 transitions, 3565 flow [2024-06-03 20:42:47,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 246 transitions, 3446 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-03 20:42:47,908 INFO L231 Difference]: Finished difference. Result has 190 places, 216 transitions, 2968 flow [2024-06-03 20:42:47,908 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} [2024-06-03 20:42:47,908 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 147 predicate places. [2024-06-03 20:42:47,908 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 216 transitions, 2968 flow [2024-06-03 20:42:47,909 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) [2024-06-03 20:42:47,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:47,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:47,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-03 20:42:47,909 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)] === [2024-06-03 20:42:47,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:47,909 INFO L85 PathProgramCache]: Analyzing trace with hash -166379930, now seen corresponding path program 3 times [2024-06-03 20:42:47,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:47,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463386058] [2024-06-03 20:42:47,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:47,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:47,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:48,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:48,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:48,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463386058] [2024-06-03 20:42:48,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463386058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:48,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:48,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:42:48,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811512124] [2024-06-03 20:42:48,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:48,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:42:48,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:48,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:42:48,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:42:48,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:48,145 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) [2024-06-03 20:42:48,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:48,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:48,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:48,529 INFO L124 PetriNetUnfolderBase]: 1925/3300 cut-off events. [2024-06-03 20:42:48,529 INFO L125 PetriNetUnfolderBase]: For 144076/144080 co-relation queries the response was YES. [2024-06-03 20:42:48,547 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. [2024-06-03 20:42:48,557 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 182 selfloop transitions, 57 changer transitions 0/246 dead transitions. [2024-06-03 20:42:48,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 246 transitions, 3480 flow [2024-06-03 20:42:48,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:42:48,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:42:48,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-03 20:42:48,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5850340136054422 [2024-06-03 20:42:48,558 INFO L175 Difference]: Start difference. First operand has 190 places, 216 transitions, 2968 flow. Second operand 7 states and 172 transitions. [2024-06-03 20:42:48,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 246 transitions, 3480 flow [2024-06-03 20:42:48,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 246 transitions, 3338 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-03 20:42:48,826 INFO L231 Difference]: Finished difference. Result has 190 places, 215 transitions, 2872 flow [2024-06-03 20:42:48,826 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} [2024-06-03 20:42:48,826 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 147 predicate places. [2024-06-03 20:42:48,826 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 215 transitions, 2872 flow [2024-06-03 20:42:48,827 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) [2024-06-03 20:42:48,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:48,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:48,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-03 20:42:48,827 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)] === [2024-06-03 20:42:48,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:48,827 INFO L85 PathProgramCache]: Analyzing trace with hash 596734886, now seen corresponding path program 3 times [2024-06-03 20:42:48,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:48,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216979881] [2024-06-03 20:42:48,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:48,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:48,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:49,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:49,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:49,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216979881] [2024-06-03 20:42:49,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216979881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:49,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:49,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:42:49,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310919964] [2024-06-03 20:42:49,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:49,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:42:49,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:49,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:42:49,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:42:49,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:49,092 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) [2024-06-03 20:42:49,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:49,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:49,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:49,537 INFO L124 PetriNetUnfolderBase]: 1930/3293 cut-off events. [2024-06-03 20:42:49,537 INFO L125 PetriNetUnfolderBase]: For 128073/128073 co-relation queries the response was YES. [2024-06-03 20:42:49,555 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. [2024-06-03 20:42:49,565 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 189 selfloop transitions, 41 changer transitions 0/237 dead transitions. [2024-06-03 20:42:49,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 237 transitions, 3535 flow [2024-06-03 20:42:49,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:42:49,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:42:49,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-03 20:42:49,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-03 20:42:49,567 INFO L175 Difference]: Start difference. First operand has 190 places, 215 transitions, 2872 flow. Second operand 8 states and 180 transitions. [2024-06-03 20:42:49,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 237 transitions, 3535 flow [2024-06-03 20:42:49,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 237 transitions, 3348 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-03 20:42:49,793 INFO L231 Difference]: Finished difference. Result has 191 places, 218 transitions, 2838 flow [2024-06-03 20:42:49,794 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} [2024-06-03 20:42:49,794 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-03 20:42:49,794 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 218 transitions, 2838 flow [2024-06-03 20:42:49,794 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) [2024-06-03 20:42:49,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:49,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:49,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-03 20:42:49,794 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)] === [2024-06-03 20:42:49,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:49,795 INFO L85 PathProgramCache]: Analyzing trace with hash -215092072, now seen corresponding path program 4 times [2024-06-03 20:42:49,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:49,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969300047] [2024-06-03 20:42:49,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:49,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:49,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:49,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:49,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:49,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969300047] [2024-06-03 20:42:49,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969300047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:49,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:49,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:42:50,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746685325] [2024-06-03 20:42:50,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:50,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:42:50,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:50,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:42:50,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:42:50,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:50,054 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) [2024-06-03 20:42:50,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:50,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:50,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:50,462 INFO L124 PetriNetUnfolderBase]: 1922/3276 cut-off events. [2024-06-03 20:42:50,463 INFO L125 PetriNetUnfolderBase]: For 127386/127386 co-relation queries the response was YES. [2024-06-03 20:42:50,543 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. [2024-06-03 20:42:50,550 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 152 selfloop transitions, 76 changer transitions 0/235 dead transitions. [2024-06-03 20:42:50,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 235 transitions, 3522 flow [2024-06-03 20:42:50,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:42:50,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:42:50,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-03 20:42:50,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5446428571428571 [2024-06-03 20:42:50,551 INFO L175 Difference]: Start difference. First operand has 191 places, 218 transitions, 2838 flow. Second operand 8 states and 183 transitions. [2024-06-03 20:42:50,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 235 transitions, 3522 flow [2024-06-03 20:42:50,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 235 transitions, 3340 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-03 20:42:50,799 INFO L231 Difference]: Finished difference. Result has 192 places, 218 transitions, 2816 flow [2024-06-03 20:42:50,799 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} [2024-06-03 20:42:50,800 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 149 predicate places. [2024-06-03 20:42:50,800 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 218 transitions, 2816 flow [2024-06-03 20:42:50,800 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) [2024-06-03 20:42:50,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:50,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:50,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-03 20:42:50,800 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)] === [2024-06-03 20:42:50,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:50,801 INFO L85 PathProgramCache]: Analyzing trace with hash 981017752, now seen corresponding path program 5 times [2024-06-03 20:42:50,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:50,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105987365] [2024-06-03 20:42:50,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:50,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:50,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:51,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:51,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:51,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105987365] [2024-06-03 20:42:51,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105987365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:51,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:51,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:42:51,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145356736] [2024-06-03 20:42:51,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:51,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:42:51,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:51,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:42:51,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:42:51,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:51,063 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) [2024-06-03 20:42:51,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:51,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:51,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:51,427 INFO L124 PetriNetUnfolderBase]: 1914/3268 cut-off events. [2024-06-03 20:42:51,427 INFO L125 PetriNetUnfolderBase]: For 128570/128570 co-relation queries the response was YES. [2024-06-03 20:42:51,445 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. [2024-06-03 20:42:51,454 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 151 selfloop transitions, 81 changer transitions 0/239 dead transitions. [2024-06-03 20:42:51,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 239 transitions, 3445 flow [2024-06-03 20:42:51,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:42:51,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:42:51,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-03 20:42:51,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6150793650793651 [2024-06-03 20:42:51,455 INFO L175 Difference]: Start difference. First operand has 192 places, 218 transitions, 2816 flow. Second operand 6 states and 155 transitions. [2024-06-03 20:42:51,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 239 transitions, 3445 flow [2024-06-03 20:42:51,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 239 transitions, 3269 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-03 20:42:51,771 INFO L231 Difference]: Finished difference. Result has 192 places, 218 transitions, 2817 flow [2024-06-03 20:42:51,771 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} [2024-06-03 20:42:51,771 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 149 predicate places. [2024-06-03 20:42:51,772 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 218 transitions, 2817 flow [2024-06-03 20:42:51,772 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) [2024-06-03 20:42:51,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:51,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:51,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-03 20:42:51,772 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)] === [2024-06-03 20:42:51,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:51,773 INFO L85 PathProgramCache]: Analyzing trace with hash -218802059, now seen corresponding path program 1 times [2024-06-03 20:42:51,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:51,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298034035] [2024-06-03 20:42:51,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:51,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:51,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:52,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:52,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:52,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298034035] [2024-06-03 20:42:52,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298034035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:52,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:52,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:42:52,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482290483] [2024-06-03 20:42:52,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:52,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:42:52,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:52,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:42:52,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:42:52,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:52,096 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) [2024-06-03 20:42:52,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:52,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:52,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:52,605 INFO L124 PetriNetUnfolderBase]: 1942/3322 cut-off events. [2024-06-03 20:42:52,605 INFO L125 PetriNetUnfolderBase]: For 136397/136401 co-relation queries the response was YES. [2024-06-03 20:42:52,626 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. [2024-06-03 20:42:52,636 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 159 selfloop transitions, 78 changer transitions 0/244 dead transitions. [2024-06-03 20:42:52,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 244 transitions, 3684 flow [2024-06-03 20:42:52,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:42:52,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:42:52,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-03 20:42:52,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5446428571428571 [2024-06-03 20:42:52,638 INFO L175 Difference]: Start difference. First operand has 192 places, 218 transitions, 2817 flow. Second operand 8 states and 183 transitions. [2024-06-03 20:42:52,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 244 transitions, 3684 flow [2024-06-03 20:42:52,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 244 transitions, 3461 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-03 20:42:52,900 INFO L231 Difference]: Finished difference. Result has 194 places, 227 transitions, 2930 flow [2024-06-03 20:42:52,900 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} [2024-06-03 20:42:52,900 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-03 20:42:52,900 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 227 transitions, 2930 flow [2024-06-03 20:42:52,900 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) [2024-06-03 20:42:52,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:52,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:52,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-03 20:42:52,901 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)] === [2024-06-03 20:42:52,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:52,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1446632379, now seen corresponding path program 2 times [2024-06-03 20:42:52,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:52,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102091529] [2024-06-03 20:42:52,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:52,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:52,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:53,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:53,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:53,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102091529] [2024-06-03 20:42:53,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102091529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:53,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:53,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:42:53,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872674355] [2024-06-03 20:42:53,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:53,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:42:53,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:53,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:42:53,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:42:53,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:53,155 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) [2024-06-03 20:42:53,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:53,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:53,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:53,597 INFO L124 PetriNetUnfolderBase]: 1954/3333 cut-off events. [2024-06-03 20:42:53,597 INFO L125 PetriNetUnfolderBase]: For 141053/141053 co-relation queries the response was YES. [2024-06-03 20:42:53,615 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. [2024-06-03 20:42:53,625 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 190 selfloop transitions, 49 changer transitions 0/246 dead transitions. [2024-06-03 20:42:53,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 246 transitions, 3623 flow [2024-06-03 20:42:53,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:42:53,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:42:53,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-03 20:42:53,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-03 20:42:53,626 INFO L175 Difference]: Start difference. First operand has 194 places, 227 transitions, 2930 flow. Second operand 7 states and 161 transitions. [2024-06-03 20:42:53,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 246 transitions, 3623 flow [2024-06-03 20:42:53,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 246 transitions, 3448 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-03 20:42:53,890 INFO L231 Difference]: Finished difference. Result has 197 places, 231 transitions, 2942 flow [2024-06-03 20:42:53,890 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} [2024-06-03 20:42:53,890 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 154 predicate places. [2024-06-03 20:42:53,890 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 231 transitions, 2942 flow [2024-06-03 20:42:53,891 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) [2024-06-03 20:42:53,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:53,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:53,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-03 20:42:53,891 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)] === [2024-06-03 20:42:53,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:53,891 INFO L85 PathProgramCache]: Analyzing trace with hash -215077409, now seen corresponding path program 3 times [2024-06-03 20:42:53,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:53,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438517369] [2024-06-03 20:42:53,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:53,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:53,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:54,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:54,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:54,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438517369] [2024-06-03 20:42:54,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438517369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:54,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:54,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:42:54,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4054153] [2024-06-03 20:42:54,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:54,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:42:54,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:54,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:42:54,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:42:54,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:54,153 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) [2024-06-03 20:42:54,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:54,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:54,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:54,565 INFO L124 PetriNetUnfolderBase]: 1948/3325 cut-off events. [2024-06-03 20:42:54,565 INFO L125 PetriNetUnfolderBase]: For 143292/143292 co-relation queries the response was YES. [2024-06-03 20:42:54,583 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. [2024-06-03 20:42:54,593 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 152 selfloop transitions, 92 changer transitions 0/251 dead transitions. [2024-06-03 20:42:54,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 251 transitions, 3680 flow [2024-06-03 20:42:54,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:42:54,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:42:54,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 241 transitions. [2024-06-03 20:42:54,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5216450216450217 [2024-06-03 20:42:54,594 INFO L175 Difference]: Start difference. First operand has 197 places, 231 transitions, 2942 flow. Second operand 11 states and 241 transitions. [2024-06-03 20:42:54,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 251 transitions, 3680 flow [2024-06-03 20:42:54,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 251 transitions, 3528 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-03 20:42:54,885 INFO L231 Difference]: Finished difference. Result has 203 places, 231 transitions, 2981 flow [2024-06-03 20:42:54,885 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} [2024-06-03 20:42:54,885 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-03 20:42:54,886 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 231 transitions, 2981 flow [2024-06-03 20:42:54,886 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) [2024-06-03 20:42:54,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:54,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:54,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-03 20:42:54,886 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)] === [2024-06-03 20:42:54,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:54,887 INFO L85 PathProgramCache]: Analyzing trace with hash -821751023, now seen corresponding path program 4 times [2024-06-03 20:42:54,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:54,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407170564] [2024-06-03 20:42:54,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:54,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:54,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:55,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:55,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:55,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407170564] [2024-06-03 20:42:55,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407170564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:55,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:55,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:42:55,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420271006] [2024-06-03 20:42:55,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:55,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:42:55,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:55,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:42:55,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:42:55,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:55,192 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) [2024-06-03 20:42:55,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:55,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:55,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:55,718 INFO L124 PetriNetUnfolderBase]: 1963/3357 cut-off events. [2024-06-03 20:42:55,718 INFO L125 PetriNetUnfolderBase]: For 149433/149433 co-relation queries the response was YES. [2024-06-03 20:42:55,734 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. [2024-06-03 20:42:55,743 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 157 selfloop transitions, 90 changer transitions 0/254 dead transitions. [2024-06-03 20:42:55,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 254 transitions, 3823 flow [2024-06-03 20:42:55,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:42:55,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:42:55,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-03 20:42:55,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2024-06-03 20:42:55,743 INFO L175 Difference]: Start difference. First operand has 203 places, 231 transitions, 2981 flow. Second operand 7 states and 170 transitions. [2024-06-03 20:42:55,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 254 transitions, 3823 flow [2024-06-03 20:42:55,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 254 transitions, 3580 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-03 20:42:55,995 INFO L231 Difference]: Finished difference. Result has 201 places, 238 transitions, 3033 flow [2024-06-03 20:42:55,995 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} [2024-06-03 20:42:55,996 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 158 predicate places. [2024-06-03 20:42:55,996 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 238 transitions, 3033 flow [2024-06-03 20:42:55,996 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) [2024-06-03 20:42:55,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:55,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:55,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-03 20:42:55,997 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)] === [2024-06-03 20:42:55,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:55,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1683604363, now seen corresponding path program 5 times [2024-06-03 20:42:55,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:55,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007304533] [2024-06-03 20:42:55,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:55,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:56,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:56,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:56,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:56,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007304533] [2024-06-03 20:42:56,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007304533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:56,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:56,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:42:56,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937827994] [2024-06-03 20:42:56,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:56,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:42:56,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:56,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:42:56,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:42:56,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:56,243 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) [2024-06-03 20:42:56,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:56,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:56,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:56,693 INFO L124 PetriNetUnfolderBase]: 1956/3349 cut-off events. [2024-06-03 20:42:56,694 INFO L125 PetriNetUnfolderBase]: For 149502/149502 co-relation queries the response was YES. [2024-06-03 20:42:56,722 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. [2024-06-03 20:42:56,731 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 161 selfloop transitions, 87 changer transitions 0/255 dead transitions. [2024-06-03 20:42:56,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 255 transitions, 3677 flow [2024-06-03 20:42:56,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:42:56,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:42:56,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-03 20:42:56,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2024-06-03 20:42:56,733 INFO L175 Difference]: Start difference. First operand has 201 places, 238 transitions, 3033 flow. Second operand 6 states and 152 transitions. [2024-06-03 20:42:56,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 255 transitions, 3677 flow [2024-06-03 20:42:56,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 255 transitions, 3485 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-03 20:42:56,975 INFO L231 Difference]: Finished difference. Result has 203 places, 238 transitions, 3028 flow [2024-06-03 20:42:56,975 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} [2024-06-03 20:42:56,976 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-03 20:42:56,976 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 238 transitions, 3028 flow [2024-06-03 20:42:56,976 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) [2024-06-03 20:42:56,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:56,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:56,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-03 20:42:56,976 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)] === [2024-06-03 20:42:56,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:56,976 INFO L85 PathProgramCache]: Analyzing trace with hash 366379209, now seen corresponding path program 1 times [2024-06-03 20:42:56,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:56,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496651148] [2024-06-03 20:42:56,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:56,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:56,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:57,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:57,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:57,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496651148] [2024-06-03 20:42:57,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496651148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:57,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:57,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:42:57,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996234105] [2024-06-03 20:42:57,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:57,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:42:57,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:57,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:42:57,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:42:57,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:57,285 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) [2024-06-03 20:42:57,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:57,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:57,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:57,742 INFO L124 PetriNetUnfolderBase]: 1995/3421 cut-off events. [2024-06-03 20:42:57,742 INFO L125 PetriNetUnfolderBase]: For 156920/156920 co-relation queries the response was YES. [2024-06-03 20:42:57,760 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. [2024-06-03 20:42:57,769 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 224 selfloop transitions, 48 changer transitions 0/279 dead transitions. [2024-06-03 20:42:57,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 279 transitions, 4142 flow [2024-06-03 20:42:57,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:42:57,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:42:57,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-03 20:42:57,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-03 20:42:57,770 INFO L175 Difference]: Start difference. First operand has 203 places, 238 transitions, 3028 flow. Second operand 8 states and 184 transitions. [2024-06-03 20:42:57,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 279 transitions, 4142 flow [2024-06-03 20:42:58,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 279 transitions, 3857 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 20:42:58,101 INFO L231 Difference]: Finished difference. Result has 206 places, 255 transitions, 3183 flow [2024-06-03 20:42:58,101 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} [2024-06-03 20:42:58,102 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 163 predicate places. [2024-06-03 20:42:58,102 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 255 transitions, 3183 flow [2024-06-03 20:42:58,102 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) [2024-06-03 20:42:58,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:58,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:58,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-03 20:42:58,102 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)] === [2024-06-03 20:42:58,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:58,102 INFO L85 PathProgramCache]: Analyzing trace with hash 966528683, now seen corresponding path program 2 times [2024-06-03 20:42:58,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:58,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490047534] [2024-06-03 20:42:58,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:58,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:58,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:58,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:58,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:58,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490047534] [2024-06-03 20:42:58,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490047534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:58,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:58,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:42:58,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200247074] [2024-06-03 20:42:58,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:58,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:42:58,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:58,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:42:58,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:42:58,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:58,368 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) [2024-06-03 20:42:58,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:58,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:58,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:58,815 INFO L124 PetriNetUnfolderBase]: 2000/3430 cut-off events. [2024-06-03 20:42:58,815 INFO L125 PetriNetUnfolderBase]: For 161567/161567 co-relation queries the response was YES. [2024-06-03 20:42:58,834 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. [2024-06-03 20:42:58,844 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 154 selfloop transitions, 121 changer transitions 0/282 dead transitions. [2024-06-03 20:42:58,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 282 transitions, 3957 flow [2024-06-03 20:42:58,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:42:58,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:42:58,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-03 20:42:58,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-03 20:42:58,845 INFO L175 Difference]: Start difference. First operand has 206 places, 255 transitions, 3183 flow. Second operand 10 states and 225 transitions. [2024-06-03 20:42:58,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 282 transitions, 3957 flow [2024-06-03 20:42:59,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 282 transitions, 3901 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-03 20:42:59,152 INFO L231 Difference]: Finished difference. Result has 213 places, 258 transitions, 3431 flow [2024-06-03 20:42:59,152 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} [2024-06-03 20:42:59,153 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 170 predicate places. [2024-06-03 20:42:59,153 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 258 transitions, 3431 flow [2024-06-03 20:42:59,153 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) [2024-06-03 20:42:59,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:59,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:59,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-03 20:42:59,154 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)] === [2024-06-03 20:42:59,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:59,154 INFO L85 PathProgramCache]: Analyzing trace with hash 517477739, now seen corresponding path program 3 times [2024-06-03 20:42:59,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:59,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467186968] [2024-06-03 20:42:59,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:59,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:59,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:59,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:59,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:59,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467186968] [2024-06-03 20:42:59,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467186968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:59,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:59,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:42:59,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671529689] [2024-06-03 20:42:59,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:59,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:42:59,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:59,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:42:59,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:42:59,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:42:59,393 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) [2024-06-03 20:42:59,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:59,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:42:59,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:59,874 INFO L124 PetriNetUnfolderBase]: 1991/3416 cut-off events. [2024-06-03 20:42:59,874 INFO L125 PetriNetUnfolderBase]: For 165293/165293 co-relation queries the response was YES. [2024-06-03 20:42:59,895 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. [2024-06-03 20:42:59,905 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 220 selfloop transitions, 53 changer transitions 0/280 dead transitions. [2024-06-03 20:42:59,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 280 transitions, 4033 flow [2024-06-03 20:42:59,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:42:59,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:42:59,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-03 20:42:59,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-03 20:42:59,907 INFO L175 Difference]: Start difference. First operand has 213 places, 258 transitions, 3431 flow. Second operand 6 states and 156 transitions. [2024-06-03 20:42:59,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 280 transitions, 4033 flow [2024-06-03 20:43:00,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 280 transitions, 3743 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-03 20:43:00,167 INFO L231 Difference]: Finished difference. Result has 212 places, 258 transitions, 3270 flow [2024-06-03 20:43:00,167 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} [2024-06-03 20:43:00,167 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 169 predicate places. [2024-06-03 20:43:00,167 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 258 transitions, 3270 flow [2024-06-03 20:43:00,168 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) [2024-06-03 20:43:00,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:00,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:43:00,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-03 20:43:00,168 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)] === [2024-06-03 20:43:00,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:00,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1565055403, now seen corresponding path program 4 times [2024-06-03 20:43:00,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:00,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170743858] [2024-06-03 20:43:00,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:00,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:00,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:00,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:00,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:00,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170743858] [2024-06-03 20:43:00,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170743858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:00,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:00,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:43:00,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322297606] [2024-06-03 20:43:00,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:00,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:43:00,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:00,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:43:00,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:43:00,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:43:00,439 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) [2024-06-03 20:43:00,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:00,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:43:00,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:00,897 INFO L124 PetriNetUnfolderBase]: 1988/3399 cut-off events. [2024-06-03 20:43:00,897 INFO L125 PetriNetUnfolderBase]: For 165835/165835 co-relation queries the response was YES. [2024-06-03 20:43:00,918 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. [2024-06-03 20:43:00,930 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 163 selfloop transitions, 109 changer transitions 0/279 dead transitions. [2024-06-03 20:43:00,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 279 transitions, 3978 flow [2024-06-03 20:43:00,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:43:00,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:43:00,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-03 20:43:00,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5214285714285715 [2024-06-03 20:43:00,932 INFO L175 Difference]: Start difference. First operand has 212 places, 258 transitions, 3270 flow. Second operand 10 states and 219 transitions. [2024-06-03 20:43:00,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 279 transitions, 3978 flow [2024-06-03 20:43:01,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 279 transitions, 3838 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-03 20:43:01,304 INFO L231 Difference]: Finished difference. Result has 216 places, 258 transitions, 3356 flow [2024-06-03 20:43:01,304 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} [2024-06-03 20:43:01,304 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 173 predicate places. [2024-06-03 20:43:01,304 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 258 transitions, 3356 flow [2024-06-03 20:43:01,305 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) [2024-06-03 20:43:01,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:01,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:43:01,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-03 20:43:01,305 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)] === [2024-06-03 20:43:01,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:01,306 INFO L85 PathProgramCache]: Analyzing trace with hash -682965045, now seen corresponding path program 5 times [2024-06-03 20:43:01,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:01,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351321133] [2024-06-03 20:43:01,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:01,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:01,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:01,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:01,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:01,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351321133] [2024-06-03 20:43:01,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351321133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:01,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:01,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:43:01,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852371920] [2024-06-03 20:43:01,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:01,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:43:01,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:01,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:43:01,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:43:01,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:43:01,617 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) [2024-06-03 20:43:01,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:01,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:43:01,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:02,039 INFO L124 PetriNetUnfolderBase]: 1985/3406 cut-off events. [2024-06-03 20:43:02,039 INFO L125 PetriNetUnfolderBase]: For 164840/164844 co-relation queries the response was YES. [2024-06-03 20:43:02,059 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. [2024-06-03 20:43:02,069 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 231 selfloop transitions, 39 changer transitions 0/277 dead transitions. [2024-06-03 20:43:02,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 277 transitions, 4056 flow [2024-06-03 20:43:02,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:43:02,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:43:02,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-03 20:43:02,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-03 20:43:02,070 INFO L175 Difference]: Start difference. First operand has 216 places, 258 transitions, 3356 flow. Second operand 8 states and 180 transitions. [2024-06-03 20:43:02,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 277 transitions, 4056 flow [2024-06-03 20:43:02,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 277 transitions, 3929 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-03 20:43:02,404 INFO L231 Difference]: Finished difference. Result has 219 places, 258 transitions, 3313 flow [2024-06-03 20:43:02,404 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} [2024-06-03 20:43:02,405 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-03 20:43:02,405 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 258 transitions, 3313 flow [2024-06-03 20:43:02,405 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) [2024-06-03 20:43:02,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:02,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:43:02,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-03 20:43:02,406 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)] === [2024-06-03 20:43:02,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:02,406 INFO L85 PathProgramCache]: Analyzing trace with hash -179690879, now seen corresponding path program 6 times [2024-06-03 20:43:02,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:02,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099764468] [2024-06-03 20:43:02,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:02,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:02,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:02,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:02,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:02,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099764468] [2024-06-03 20:43:02,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099764468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:02,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:02,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:43:02,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537593533] [2024-06-03 20:43:02,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:02,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:43:02,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:02,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:43:02,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:43:02,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:43:02,686 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) [2024-06-03 20:43:02,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:02,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:43:02,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:03,170 INFO L124 PetriNetUnfolderBase]: 1977/3394 cut-off events. [2024-06-03 20:43:03,170 INFO L125 PetriNetUnfolderBase]: For 168014/168018 co-relation queries the response was YES. [2024-06-03 20:43:03,189 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. [2024-06-03 20:43:03,197 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 170 selfloop transitions, 97 changer transitions 0/274 dead transitions. [2024-06-03 20:43:03,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 274 transitions, 4001 flow [2024-06-03 20:43:03,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:43:03,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:43:03,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-03 20:43:03,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-03 20:43:03,198 INFO L175 Difference]: Start difference. First operand has 219 places, 258 transitions, 3313 flow. Second operand 8 states and 182 transitions. [2024-06-03 20:43:03,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 274 transitions, 4001 flow [2024-06-03 20:43:03,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 274 transitions, 3849 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-03 20:43:03,545 INFO L231 Difference]: Finished difference. Result has 220 places, 258 transitions, 3363 flow [2024-06-03 20:43:03,545 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} [2024-06-03 20:43:03,546 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 177 predicate places. [2024-06-03 20:43:03,546 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 258 transitions, 3363 flow [2024-06-03 20:43:03,546 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) [2024-06-03 20:43:03,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:03,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:43:03,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-03 20:43:03,546 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)] === [2024-06-03 20:43:03,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:03,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1896211429, now seen corresponding path program 7 times [2024-06-03 20:43:03,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:03,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507698323] [2024-06-03 20:43:03,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:03,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:03,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:03,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:03,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:03,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507698323] [2024-06-03 20:43:03,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507698323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:03,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:03,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:43:03,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074598198] [2024-06-03 20:43:03,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:03,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:43:03,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:03,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:43:03,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:43:03,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:43:03,809 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) [2024-06-03 20:43:03,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:03,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:43:03,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:04,257 INFO L124 PetriNetUnfolderBase]: 1987/3401 cut-off events. [2024-06-03 20:43:04,257 INFO L125 PetriNetUnfolderBase]: For 174132/174132 co-relation queries the response was YES. [2024-06-03 20:43:04,279 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. [2024-06-03 20:43:04,289 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 211 selfloop transitions, 61 changer transitions 0/279 dead transitions. [2024-06-03 20:43:04,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 279 transitions, 4135 flow [2024-06-03 20:43:04,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:43:04,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:43:04,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-03 20:43:04,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5264550264550265 [2024-06-03 20:43:04,290 INFO L175 Difference]: Start difference. First operand has 220 places, 258 transitions, 3363 flow. Second operand 9 states and 199 transitions. [2024-06-03 20:43:04,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 279 transitions, 4135 flow [2024-06-03 20:43:04,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 279 transitions, 3947 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-03 20:43:04,657 INFO L231 Difference]: Finished difference. Result has 223 places, 262 transitions, 3374 flow [2024-06-03 20:43:04,657 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} [2024-06-03 20:43:04,657 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-03 20:43:04,658 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 262 transitions, 3374 flow [2024-06-03 20:43:04,658 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) [2024-06-03 20:43:04,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:04,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:43:04,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-03 20:43:04,658 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)] === [2024-06-03 20:43:04,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:04,659 INFO L85 PathProgramCache]: Analyzing trace with hash -730332805, now seen corresponding path program 8 times [2024-06-03 20:43:04,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:04,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603572154] [2024-06-03 20:43:04,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:04,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:04,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:04,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:04,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:04,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603572154] [2024-06-03 20:43:04,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603572154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:04,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:04,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:43:04,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393455175] [2024-06-03 20:43:04,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:04,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:43:04,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:04,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:43:04,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:43:04,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:43:04,927 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) [2024-06-03 20:43:04,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:04,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:43:04,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:05,372 INFO L124 PetriNetUnfolderBase]: 1979/3389 cut-off events. [2024-06-03 20:43:05,372 INFO L125 PetriNetUnfolderBase]: For 175304/175304 co-relation queries the response was YES. [2024-06-03 20:43:05,393 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. [2024-06-03 20:43:05,403 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 166 selfloop transitions, 106 changer transitions 0/279 dead transitions. [2024-06-03 20:43:05,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 279 transitions, 4078 flow [2024-06-03 20:43:05,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:43:05,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:43:05,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-03 20:43:05,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5343915343915344 [2024-06-03 20:43:05,404 INFO L175 Difference]: Start difference. First operand has 223 places, 262 transitions, 3374 flow. Second operand 9 states and 202 transitions. [2024-06-03 20:43:05,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 279 transitions, 4078 flow [2024-06-03 20:43:05,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 279 transitions, 3824 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-03 20:43:05,809 INFO L231 Difference]: Finished difference. Result has 224 places, 262 transitions, 3341 flow [2024-06-03 20:43:05,809 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} [2024-06-03 20:43:05,809 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 181 predicate places. [2024-06-03 20:43:05,809 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 262 transitions, 3341 flow [2024-06-03 20:43:05,810 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) [2024-06-03 20:43:05,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:05,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:43:05,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-03 20:43:05,810 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)] === [2024-06-03 20:43:05,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:05,811 INFO L85 PathProgramCache]: Analyzing trace with hash 346780173, now seen corresponding path program 9 times [2024-06-03 20:43:05,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:05,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744826814] [2024-06-03 20:43:05,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:05,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:05,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:06,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:06,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:06,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744826814] [2024-06-03 20:43:06,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744826814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:06,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:06,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:43:06,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856554172] [2024-06-03 20:43:06,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:06,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:43:06,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:06,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:43:06,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:43:06,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:43:06,043 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) [2024-06-03 20:43:06,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:06,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:43:06,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:06,493 INFO L124 PetriNetUnfolderBase]: 1989/3420 cut-off events. [2024-06-03 20:43:06,493 INFO L125 PetriNetUnfolderBase]: For 179201/179201 co-relation queries the response was YES. [2024-06-03 20:43:06,515 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. [2024-06-03 20:43:06,525 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 180 selfloop transitions, 106 changer transitions 0/293 dead transitions. [2024-06-03 20:43:06,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 293 transitions, 4193 flow [2024-06-03 20:43:06,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:43:06,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:43:06,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-03 20:43:06,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-06-03 20:43:06,526 INFO L175 Difference]: Start difference. First operand has 224 places, 262 transitions, 3341 flow. Second operand 7 states and 184 transitions. [2024-06-03 20:43:06,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 293 transitions, 4193 flow [2024-06-03 20:43:07,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 293 transitions, 3975 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-03 20:43:07,019 INFO L231 Difference]: Finished difference. Result has 223 places, 266 transitions, 3457 flow [2024-06-03 20:43:07,019 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} [2024-06-03 20:43:07,020 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-03 20:43:07,020 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 266 transitions, 3457 flow [2024-06-03 20:43:07,020 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) [2024-06-03 20:43:07,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:07,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:43:07,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-03 20:43:07,020 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)] === [2024-06-03 20:43:07,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:07,020 INFO L85 PathProgramCache]: Analyzing trace with hash -652141431, now seen corresponding path program 10 times [2024-06-03 20:43:07,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:07,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120966676] [2024-06-03 20:43:07,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:07,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:07,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:07,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:07,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:07,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120966676] [2024-06-03 20:43:07,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120966676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:07,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:07,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:43:07,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751730838] [2024-06-03 20:43:07,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:07,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:43:07,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:07,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:43:07,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:43:07,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:43:07,320 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) [2024-06-03 20:43:07,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:07,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:43:07,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:07,782 INFO L124 PetriNetUnfolderBase]: 1981/3400 cut-off events. [2024-06-03 20:43:07,783 INFO L125 PetriNetUnfolderBase]: For 180677/180677 co-relation queries the response was YES. [2024-06-03 20:43:07,804 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. [2024-06-03 20:43:07,813 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 184 selfloop transitions, 94 changer transitions 0/285 dead transitions. [2024-06-03 20:43:07,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 285 transitions, 4061 flow [2024-06-03 20:43:07,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:43:07,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:43:07,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-03 20:43:07,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-03 20:43:07,814 INFO L175 Difference]: Start difference. First operand has 223 places, 266 transitions, 3457 flow. Second operand 6 states and 154 transitions. [2024-06-03 20:43:07,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 285 transitions, 4061 flow [2024-06-03 20:43:08,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 285 transitions, 3774 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-03 20:43:08,261 INFO L231 Difference]: Finished difference. Result has 222 places, 266 transitions, 3371 flow [2024-06-03 20:43:08,261 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} [2024-06-03 20:43:08,261 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 179 predicate places. [2024-06-03 20:43:08,261 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 266 transitions, 3371 flow [2024-06-03 20:43:08,261 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) [2024-06-03 20:43:08,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:08,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:43:08,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-03 20:43:08,262 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)] === [2024-06-03 20:43:08,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:08,262 INFO L85 PathProgramCache]: Analyzing trace with hash -430718847, now seen corresponding path program 1 times [2024-06-03 20:43:08,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:08,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384168076] [2024-06-03 20:43:08,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:08,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:08,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:08,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:08,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:08,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384168076] [2024-06-03 20:43:08,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384168076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:08,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:08,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:43:08,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407757159] [2024-06-03 20:43:08,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:08,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:43:08,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:08,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:43:08,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:43:08,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-03 20:43:08,505 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) [2024-06-03 20:43:08,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:08,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-03 20:43:08,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:08,974 INFO L124 PetriNetUnfolderBase]: 1915/3336 cut-off events. [2024-06-03 20:43:08,974 INFO L125 PetriNetUnfolderBase]: For 185285/185285 co-relation queries the response was YES. [2024-06-03 20:43:08,993 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. [2024-06-03 20:43:09,001 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 217 selfloop transitions, 26 changer transitions 1/289 dead transitions. [2024-06-03 20:43:09,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 289 transitions, 3939 flow [2024-06-03 20:43:09,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:43:09,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:43:09,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2024-06-03 20:43:09,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-03 20:43:09,002 INFO L175 Difference]: Start difference. First operand has 222 places, 266 transitions, 3371 flow. Second operand 5 states and 135 transitions. [2024-06-03 20:43:09,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 289 transitions, 3939 flow [2024-06-03 20:43:09,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 289 transitions, 3654 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-03 20:43:09,452 INFO L231 Difference]: Finished difference. Result has 220 places, 267 transitions, 3160 flow [2024-06-03 20:43:09,452 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} [2024-06-03 20:43:09,452 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 177 predicate places. [2024-06-03 20:43:09,452 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 267 transitions, 3160 flow [2024-06-03 20:43:09,452 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) [2024-06-03 20:43:09,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:09,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:43:09,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-03 20:43:09,453 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)] === [2024-06-03 20:43:09,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:09,453 INFO L85 PathProgramCache]: Analyzing trace with hash -415481727, now seen corresponding path program 2 times [2024-06-03 20:43:09,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:09,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14835173] [2024-06-03 20:43:09,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:09,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:09,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:09,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:09,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:09,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14835173] [2024-06-03 20:43:09,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14835173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:09,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:09,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:43:09,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901976538] [2024-06-03 20:43:09,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:09,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:43:09,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:09,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:43:09,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:43:09,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-03 20:43:09,702 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) [2024-06-03 20:43:09,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:09,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-03 20:43:09,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:10,085 INFO L124 PetriNetUnfolderBase]: 1917/3339 cut-off events. [2024-06-03 20:43:10,085 INFO L125 PetriNetUnfolderBase]: For 177161/177161 co-relation queries the response was YES. [2024-06-03 20:43:10,108 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. [2024-06-03 20:43:10,117 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 221 selfloop transitions, 22 changer transitions 0/288 dead transitions. [2024-06-03 20:43:10,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 288 transitions, 3850 flow [2024-06-03 20:43:10,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:43:10,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:43:10,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-03 20:43:10,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-06-03 20:43:10,118 INFO L175 Difference]: Start difference. First operand has 220 places, 267 transitions, 3160 flow. Second operand 5 states and 129 transitions. [2024-06-03 20:43:10,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 288 transitions, 3850 flow [2024-06-03 20:43:10,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 288 transitions, 3802 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-03 20:43:10,533 INFO L231 Difference]: Finished difference. Result has 222 places, 268 transitions, 3172 flow [2024-06-03 20:43:10,533 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} [2024-06-03 20:43:10,533 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 179 predicate places. [2024-06-03 20:43:10,533 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 268 transitions, 3172 flow [2024-06-03 20:43:10,533 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) [2024-06-03 20:43:10,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:10,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:43:10,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-03 20:43:10,534 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)] === [2024-06-03 20:43:10,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:10,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1804209993, now seen corresponding path program 1 times [2024-06-03 20:43:10,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:10,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350654594] [2024-06-03 20:43:10,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:10,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:10,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:10,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:10,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:10,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350654594] [2024-06-03 20:43:10,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350654594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:10,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:10,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:43:10,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011899307] [2024-06-03 20:43:10,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:10,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:43:10,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:10,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:43:10,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:43:10,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:43:10,813 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) [2024-06-03 20:43:10,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:10,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:43:10,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:11,336 INFO L124 PetriNetUnfolderBase]: 2019/3477 cut-off events. [2024-06-03 20:43:11,337 INFO L125 PetriNetUnfolderBase]: For 172198/172202 co-relation queries the response was YES. [2024-06-03 20:43:11,359 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. [2024-06-03 20:43:11,370 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 254 selfloop transitions, 32 changer transitions 0/293 dead transitions. [2024-06-03 20:43:11,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 293 transitions, 4014 flow [2024-06-03 20:43:11,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:43:11,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:43:11,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-03 20:43:11,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5267857142857143 [2024-06-03 20:43:11,371 INFO L175 Difference]: Start difference. First operand has 222 places, 268 transitions, 3172 flow. Second operand 8 states and 177 transitions. [2024-06-03 20:43:11,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 293 transitions, 4014 flow [2024-06-03 20:43:11,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 293 transitions, 3976 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-03 20:43:11,732 INFO L231 Difference]: Finished difference. Result has 228 places, 272 transitions, 3303 flow [2024-06-03 20:43:11,732 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} [2024-06-03 20:43:11,733 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 185 predicate places. [2024-06-03 20:43:11,733 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 272 transitions, 3303 flow [2024-06-03 20:43:11,733 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) [2024-06-03 20:43:11,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:11,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:43:11,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-03 20:43:11,733 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)] === [2024-06-03 20:43:11,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:11,734 INFO L85 PathProgramCache]: Analyzing trace with hash -290503479, now seen corresponding path program 2 times [2024-06-03 20:43:11,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:11,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973183298] [2024-06-03 20:43:11,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:11,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:11,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:11,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:11,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:11,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973183298] [2024-06-03 20:43:11,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973183298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:11,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:11,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:43:11,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573156765] [2024-06-03 20:43:11,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:11,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:43:11,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:11,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:43:11,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:43:12,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:43:12,020 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) [2024-06-03 20:43:12,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:12,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:43:12,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:12,443 INFO L124 PetriNetUnfolderBase]: 2027/3489 cut-off events. [2024-06-03 20:43:12,443 INFO L125 PetriNetUnfolderBase]: For 177962/177966 co-relation queries the response was YES. [2024-06-03 20:43:12,465 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. [2024-06-03 20:43:12,475 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 255 selfloop transitions, 28 changer transitions 0/290 dead transitions. [2024-06-03 20:43:12,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 290 transitions, 3959 flow [2024-06-03 20:43:12,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:43:12,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:43:12,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-03 20:43:12,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5119047619047619 [2024-06-03 20:43:12,476 INFO L175 Difference]: Start difference. First operand has 228 places, 272 transitions, 3303 flow. Second operand 8 states and 172 transitions. [2024-06-03 20:43:12,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 290 transitions, 3959 flow [2024-06-03 20:43:12,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 290 transitions, 3851 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-06-03 20:43:12,929 INFO L231 Difference]: Finished difference. Result has 233 places, 274 transitions, 3312 flow [2024-06-03 20:43:12,929 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} [2024-06-03 20:43:12,929 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-03 20:43:12,929 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 274 transitions, 3312 flow [2024-06-03 20:43:12,929 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) [2024-06-03 20:43:12,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:12,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:43:12,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-03 20:43:12,930 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)] === [2024-06-03 20:43:12,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:12,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1895934599, now seen corresponding path program 3 times [2024-06-03 20:43:12,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:12,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227971320] [2024-06-03 20:43:12,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:12,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:12,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:13,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:13,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:13,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227971320] [2024-06-03 20:43:13,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227971320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:13,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:13,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:43:13,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608107974] [2024-06-03 20:43:13,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:13,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:43:13,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:13,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:43:13,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:43:13,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:43:13,246 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) [2024-06-03 20:43:13,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:13,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:43:13,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:13,720 INFO L124 PetriNetUnfolderBase]: 2035/3497 cut-off events. [2024-06-03 20:43:13,720 INFO L125 PetriNetUnfolderBase]: For 182363/182363 co-relation queries the response was YES. [2024-06-03 20:43:13,742 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. [2024-06-03 20:43:13,751 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 266 selfloop transitions, 18 changer transitions 0/291 dead transitions. [2024-06-03 20:43:13,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 291 transitions, 3954 flow [2024-06-03 20:43:13,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:43:13,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:43:13,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-06-03 20:43:13,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5204081632653061 [2024-06-03 20:43:13,752 INFO L175 Difference]: Start difference. First operand has 233 places, 274 transitions, 3312 flow. Second operand 7 states and 153 transitions. [2024-06-03 20:43:13,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 291 transitions, 3954 flow [2024-06-03 20:43:14,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 291 transitions, 3871 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-03 20:43:14,141 INFO L231 Difference]: Finished difference. Result has 234 places, 276 transitions, 3312 flow [2024-06-03 20:43:14,141 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} [2024-06-03 20:43:14,141 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-03 20:43:14,142 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 276 transitions, 3312 flow [2024-06-03 20:43:14,142 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) [2024-06-03 20:43:14,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:14,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:43:14,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-03 20:43:14,142 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)] === [2024-06-03 20:43:14,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:14,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1536146493, now seen corresponding path program 1 times [2024-06-03 20:43:14,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:14,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628356434] [2024-06-03 20:43:14,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:14,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:14,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:14,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:14,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:14,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628356434] [2024-06-03 20:43:14,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628356434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:14,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:14,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:43:14,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170629738] [2024-06-03 20:43:14,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:14,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:43:14,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:14,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:43:14,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:43:14,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:43:14,459 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) [2024-06-03 20:43:14,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:14,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:43:14,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:15,055 INFO L124 PetriNetUnfolderBase]: 2051/3509 cut-off events. [2024-06-03 20:43:15,055 INFO L125 PetriNetUnfolderBase]: For 193354/193354 co-relation queries the response was YES. [2024-06-03 20:43:15,091 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. [2024-06-03 20:43:15,105 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 176 selfloop transitions, 113 changer transitions 0/296 dead transitions. [2024-06-03 20:43:15,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 296 transitions, 3994 flow [2024-06-03 20:43:15,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:43:15,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:43:15,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-03 20:43:15,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5291005291005291 [2024-06-03 20:43:15,106 INFO L175 Difference]: Start difference. First operand has 234 places, 276 transitions, 3312 flow. Second operand 9 states and 200 transitions. [2024-06-03 20:43:15,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 296 transitions, 3994 flow [2024-06-03 20:43:15,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 296 transitions, 3931 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-03 20:43:15,681 INFO L231 Difference]: Finished difference. Result has 238 places, 279 transitions, 3551 flow [2024-06-03 20:43:15,681 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} [2024-06-03 20:43:15,681 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 195 predicate places. [2024-06-03 20:43:15,681 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 279 transitions, 3551 flow [2024-06-03 20:43:15,682 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) [2024-06-03 20:43:15,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:15,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:43:15,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-03 20:43:15,682 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)] === [2024-06-03 20:43:15,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:15,682 INFO L85 PathProgramCache]: Analyzing trace with hash 347057003, now seen corresponding path program 4 times [2024-06-03 20:43:15,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:15,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474284546] [2024-06-03 20:43:15,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:15,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:15,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:15,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:15,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:15,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474284546] [2024-06-03 20:43:15,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474284546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:15,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:15,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:43:15,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481139423] [2024-06-03 20:43:15,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:15,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:43:15,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:15,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:43:15,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:43:15,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:43:15,948 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) [2024-06-03 20:43:15,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:15,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:43:15,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:16,447 INFO L124 PetriNetUnfolderBase]: 2046/3517 cut-off events. [2024-06-03 20:43:16,447 INFO L125 PetriNetUnfolderBase]: For 190561/190561 co-relation queries the response was YES. [2024-06-03 20:43:16,470 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. [2024-06-03 20:43:16,479 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 270 selfloop transitions, 22 changer transitions 0/299 dead transitions. [2024-06-03 20:43:16,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 299 transitions, 4185 flow [2024-06-03 20:43:16,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:43:16,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:43:16,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-03 20:43:16,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-03 20:43:16,480 INFO L175 Difference]: Start difference. First operand has 238 places, 279 transitions, 3551 flow. Second operand 6 states and 144 transitions. [2024-06-03 20:43:16,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 299 transitions, 4185 flow [2024-06-03 20:43:16,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 299 transitions, 3881 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-03 20:43:16,818 INFO L231 Difference]: Finished difference. Result has 237 places, 279 transitions, 3299 flow [2024-06-03 20:43:16,819 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} [2024-06-03 20:43:16,819 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-03 20:43:16,819 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 279 transitions, 3299 flow [2024-06-03 20:43:16,819 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) [2024-06-03 20:43:16,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:16,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:43:16,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-03 20:43:16,819 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)] === [2024-06-03 20:43:16,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:16,820 INFO L85 PathProgramCache]: Analyzing trace with hash -424045663, now seen corresponding path program 2 times [2024-06-03 20:43:16,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:16,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620974808] [2024-06-03 20:43:16,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:16,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:16,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:17,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:17,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:17,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620974808] [2024-06-03 20:43:17,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620974808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:17,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:17,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:43:17,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616456222] [2024-06-03 20:43:17,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:17,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:43:17,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:17,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:43:17,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:43:17,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:43:17,093 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) [2024-06-03 20:43:17,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:17,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:43:17,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:17,586 INFO L124 PetriNetUnfolderBase]: 2090/3575 cut-off events. [2024-06-03 20:43:17,587 INFO L125 PetriNetUnfolderBase]: For 219284/219284 co-relation queries the response was YES. [2024-06-03 20:43:17,611 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. [2024-06-03 20:43:17,621 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 193 selfloop transitions, 101 changer transitions 0/301 dead transitions. [2024-06-03 20:43:17,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 301 transitions, 4017 flow [2024-06-03 20:43:17,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:43:17,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:43:17,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-03 20:43:17,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5654761904761905 [2024-06-03 20:43:17,622 INFO L175 Difference]: Start difference. First operand has 237 places, 279 transitions, 3299 flow. Second operand 8 states and 190 transitions. [2024-06-03 20:43:17,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 301 transitions, 4017 flow [2024-06-03 20:43:18,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 301 transitions, 3959 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-03 20:43:18,046 INFO L231 Difference]: Finished difference. Result has 240 places, 282 transitions, 3527 flow [2024-06-03 20:43:18,046 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} [2024-06-03 20:43:18,046 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 197 predicate places. [2024-06-03 20:43:18,046 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 282 transitions, 3527 flow [2024-06-03 20:43:18,046 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) [2024-06-03 20:43:18,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:18,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:43:18,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-03 20:43:18,047 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)] === [2024-06-03 20:43:18,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:18,047 INFO L85 PathProgramCache]: Analyzing trace with hash -415474783, now seen corresponding path program 3 times [2024-06-03 20:43:18,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:18,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784168464] [2024-06-03 20:43:18,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:18,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:18,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:18,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:18,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:18,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784168464] [2024-06-03 20:43:18,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784168464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:18,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:18,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:43:18,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379578876] [2024-06-03 20:43:18,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:18,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:43:18,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:18,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:43:18,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:43:18,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:43:18,347 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) [2024-06-03 20:43:18,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:18,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:43:18,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:19,036 INFO L124 PetriNetUnfolderBase]: 2432/4131 cut-off events. [2024-06-03 20:43:19,037 INFO L125 PetriNetUnfolderBase]: For 350745/350745 co-relation queries the response was YES. [2024-06-03 20:43:19,066 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. [2024-06-03 20:43:19,081 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 203 selfloop transitions, 105 changer transitions 0/315 dead transitions. [2024-06-03 20:43:19,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 315 transitions, 4544 flow [2024-06-03 20:43:19,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:43:19,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:43:19,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-03 20:43:19,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-03 20:43:19,082 INFO L175 Difference]: Start difference. First operand has 240 places, 282 transitions, 3527 flow. Second operand 8 states and 196 transitions. [2024-06-03 20:43:19,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 315 transitions, 4544 flow [2024-06-03 20:43:19,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 315 transitions, 4290 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-03 20:43:19,748 INFO L231 Difference]: Finished difference. Result has 243 places, 288 transitions, 3648 flow [2024-06-03 20:43:19,748 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} [2024-06-03 20:43:19,748 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 200 predicate places. [2024-06-03 20:43:19,749 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 288 transitions, 3648 flow [2024-06-03 20:43:19,749 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) [2024-06-03 20:43:19,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:19,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:43:19,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-03 20:43:19,749 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)] === [2024-06-03 20:43:19,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:19,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1065837045, now seen corresponding path program 4 times [2024-06-03 20:43:19,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:19,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998172139] [2024-06-03 20:43:19,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:19,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:19,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:20,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:20,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:20,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998172139] [2024-06-03 20:43:20,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998172139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:20,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:20,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:43:20,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194643725] [2024-06-03 20:43:20,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:20,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:43:20,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:20,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:43:20,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:43:20,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:43:20,095 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) [2024-06-03 20:43:20,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:20,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:43:20,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:20,723 INFO L124 PetriNetUnfolderBase]: 2404/4093 cut-off events. [2024-06-03 20:43:20,723 INFO L125 PetriNetUnfolderBase]: For 328702/328702 co-relation queries the response was YES. [2024-06-03 20:43:20,753 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. [2024-06-03 20:43:20,766 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 207 selfloop transitions, 98 changer transitions 0/312 dead transitions. [2024-06-03 20:43:20,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 312 transitions, 4408 flow [2024-06-03 20:43:20,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:43:20,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:43:20,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-03 20:43:20,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-03 20:43:20,768 INFO L175 Difference]: Start difference. First operand has 243 places, 288 transitions, 3648 flow. Second operand 7 states and 173 transitions. [2024-06-03 20:43:20,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 312 transitions, 4408 flow [2024-06-03 20:43:21,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 312 transitions, 4206 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-03 20:43:21,601 INFO L231 Difference]: Finished difference. Result has 246 places, 291 transitions, 3740 flow [2024-06-03 20:43:21,601 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} [2024-06-03 20:43:21,601 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 203 predicate places. [2024-06-03 20:43:21,602 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 291 transitions, 3740 flow [2024-06-03 20:43:21,602 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) [2024-06-03 20:43:21,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:21,602 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] [2024-06-03 20:43:21,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-03 20:43:21,602 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)] === [2024-06-03 20:43:21,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:21,602 INFO L85 PathProgramCache]: Analyzing trace with hash -973756629, now seen corresponding path program 1 times [2024-06-03 20:43:21,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:21,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392047347] [2024-06-03 20:43:21,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:21,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:21,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:21,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:21,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:21,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392047347] [2024-06-03 20:43:21,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392047347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:21,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:21,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:43:21,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024827307] [2024-06-03 20:43:21,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:21,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:43:21,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:21,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:43:21,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:43:21,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:43:21,947 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) [2024-06-03 20:43:21,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:21,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:43:21,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:22,785 INFO L124 PetriNetUnfolderBase]: 2417/4123 cut-off events. [2024-06-03 20:43:22,785 INFO L125 PetriNetUnfolderBase]: For 316958/316958 co-relation queries the response was YES. [2024-06-03 20:43:22,815 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. [2024-06-03 20:43:22,828 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 280 selfloop transitions, 42 changer transitions 0/329 dead transitions. [2024-06-03 20:43:22,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 329 transitions, 4732 flow [2024-06-03 20:43:22,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:43:22,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:43:22,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-03 20:43:22,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-03 20:43:22,829 INFO L175 Difference]: Start difference. First operand has 246 places, 291 transitions, 3740 flow. Second operand 9 states and 213 transitions. [2024-06-03 20:43:22,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 329 transitions, 4732 flow [2024-06-03 20:43:23,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 329 transitions, 4482 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-03 20:43:23,335 INFO L231 Difference]: Finished difference. Result has 251 places, 297 transitions, 3721 flow [2024-06-03 20:43:23,335 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} [2024-06-03 20:43:23,335 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 208 predicate places. [2024-06-03 20:43:23,336 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 297 transitions, 3721 flow [2024-06-03 20:43:23,336 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) [2024-06-03 20:43:23,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:23,336 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] [2024-06-03 20:43:23,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-03 20:43:23,336 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)] === [2024-06-03 20:43:23,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:23,336 INFO L85 PathProgramCache]: Analyzing trace with hash -285503941, now seen corresponding path program 2 times [2024-06-03 20:43:23,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:23,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756119952] [2024-06-03 20:43:23,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:23,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:23,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:23,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:23,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:23,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756119952] [2024-06-03 20:43:23,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756119952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:23,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:23,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:43:23,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578857377] [2024-06-03 20:43:23,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:23,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:43:23,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:23,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:43:23,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:43:23,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:43:23,603 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) [2024-06-03 20:43:23,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:23,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:43:23,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:24,207 INFO L124 PetriNetUnfolderBase]: 2454/4185 cut-off events. [2024-06-03 20:43:24,207 INFO L125 PetriNetUnfolderBase]: For 336272/336272 co-relation queries the response was YES. [2024-06-03 20:43:24,237 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. [2024-06-03 20:43:24,352 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 170 selfloop transitions, 166 changer transitions 0/343 dead transitions. [2024-06-03 20:43:24,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 343 transitions, 5253 flow [2024-06-03 20:43:24,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:43:24,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:43:24,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 254 transitions. [2024-06-03 20:43:24,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5497835497835498 [2024-06-03 20:43:24,353 INFO L175 Difference]: Start difference. First operand has 251 places, 297 transitions, 3721 flow. Second operand 11 states and 254 transitions. [2024-06-03 20:43:24,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 343 transitions, 5253 flow [2024-06-03 20:43:25,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 343 transitions, 5104 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-03 20:43:25,039 INFO L231 Difference]: Finished difference. Result has 258 places, 311 transitions, 4211 flow [2024-06-03 20:43:25,039 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} [2024-06-03 20:43:25,040 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 215 predicate places. [2024-06-03 20:43:25,040 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 311 transitions, 4211 flow [2024-06-03 20:43:25,040 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) [2024-06-03 20:43:25,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:25,040 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] [2024-06-03 20:43:25,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-03 20:43:25,041 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)] === [2024-06-03 20:43:25,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:25,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1281955785, now seen corresponding path program 3 times [2024-06-03 20:43:25,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:25,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122872208] [2024-06-03 20:43:25,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:25,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:25,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:25,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:25,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:25,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122872208] [2024-06-03 20:43:25,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122872208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:25,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:25,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:43:25,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508705660] [2024-06-03 20:43:25,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:25,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:43:25,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:25,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:43:25,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:43:25,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:43:25,266 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) [2024-06-03 20:43:25,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:25,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:43:25,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:25,855 INFO L124 PetriNetUnfolderBase]: 2459/4198 cut-off events. [2024-06-03 20:43:25,855 INFO L125 PetriNetUnfolderBase]: For 350684/350684 co-relation queries the response was YES. [2024-06-03 20:43:25,885 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. [2024-06-03 20:43:25,897 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 169 selfloop transitions, 166 changer transitions 0/342 dead transitions. [2024-06-03 20:43:25,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 342 transitions, 5552 flow [2024-06-03 20:43:25,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:43:25,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:43:25,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 233 transitions. [2024-06-03 20:43:25,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5547619047619048 [2024-06-03 20:43:25,899 INFO L175 Difference]: Start difference. First operand has 258 places, 311 transitions, 4211 flow. Second operand 10 states and 233 transitions. [2024-06-03 20:43:25,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 342 transitions, 5552 flow [2024-06-03 20:43:26,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 342 transitions, 5266 flow, removed 94 selfloop flow, removed 6 redundant places. [2024-06-03 20:43:26,821 INFO L231 Difference]: Finished difference. Result has 262 places, 314 transitions, 4352 flow [2024-06-03 20:43:26,822 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} [2024-06-03 20:43:26,822 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 219 predicate places. [2024-06-03 20:43:26,822 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 314 transitions, 4352 flow [2024-06-03 20:43:26,822 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) [2024-06-03 20:43:26,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:26,822 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] [2024-06-03 20:43:26,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-03 20:43:26,822 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)] === [2024-06-03 20:43:26,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:26,823 INFO L85 PathProgramCache]: Analyzing trace with hash -85845961, now seen corresponding path program 4 times [2024-06-03 20:43:26,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:26,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514695500] [2024-06-03 20:43:26,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:26,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:26,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:27,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:27,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:27,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514695500] [2024-06-03 20:43:27,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514695500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:27,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:27,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:43:27,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702472538] [2024-06-03 20:43:27,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:27,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:43:27,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:27,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:43:27,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:43:27,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:43:27,068 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) [2024-06-03 20:43:27,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:27,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:43:27,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:27,663 INFO L124 PetriNetUnfolderBase]: 2480/4226 cut-off events. [2024-06-03 20:43:27,663 INFO L125 PetriNetUnfolderBase]: For 351262/351262 co-relation queries the response was YES. [2024-06-03 20:43:27,693 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. [2024-06-03 20:43:27,705 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 274 selfloop transitions, 67 changer transitions 0/348 dead transitions. [2024-06-03 20:43:27,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 348 transitions, 5358 flow [2024-06-03 20:43:27,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:43:27,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:43:27,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-03 20:43:27,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-03 20:43:27,706 INFO L175 Difference]: Start difference. First operand has 262 places, 314 transitions, 4352 flow. Second operand 7 states and 180 transitions. [2024-06-03 20:43:27,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 348 transitions, 5358 flow [2024-06-03 20:43:28,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 348 transitions, 5024 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-03 20:43:28,470 INFO L231 Difference]: Finished difference. Result has 264 places, 321 transitions, 4318 flow [2024-06-03 20:43:28,471 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} [2024-06-03 20:43:28,471 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 221 predicate places. [2024-06-03 20:43:28,471 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 321 transitions, 4318 flow [2024-06-03 20:43:28,471 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) [2024-06-03 20:43:28,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:28,471 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] [2024-06-03 20:43:28,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-03 20:43:28,471 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)] === [2024-06-03 20:43:28,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:28,472 INFO L85 PathProgramCache]: Analyzing trace with hash 432064567, now seen corresponding path program 5 times [2024-06-03 20:43:28,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:28,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573721694] [2024-06-03 20:43:28,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:28,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:28,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:28,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:28,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:28,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573721694] [2024-06-03 20:43:28,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573721694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:28,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:28,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:43:28,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457637763] [2024-06-03 20:43:28,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:28,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:43:28,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:28,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:43:28,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:43:28,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:43:28,743 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) [2024-06-03 20:43:28,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:28,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:43:28,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:29,393 INFO L124 PetriNetUnfolderBase]: 2485/4207 cut-off events. [2024-06-03 20:43:29,394 INFO L125 PetriNetUnfolderBase]: For 359215/359215 co-relation queries the response was YES. [2024-06-03 20:43:29,426 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. [2024-06-03 20:43:29,439 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 186 selfloop transitions, 165 changer transitions 0/358 dead transitions. [2024-06-03 20:43:29,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 358 transitions, 5791 flow [2024-06-03 20:43:29,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:43:29,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:43:29,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 247 transitions. [2024-06-03 20:43:29,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5346320346320347 [2024-06-03 20:43:29,440 INFO L175 Difference]: Start difference. First operand has 264 places, 321 transitions, 4318 flow. Second operand 11 states and 247 transitions. [2024-06-03 20:43:29,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 358 transitions, 5791 flow [2024-06-03 20:43:30,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 358 transitions, 5689 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-03 20:43:30,212 INFO L231 Difference]: Finished difference. Result has 271 places, 331 transitions, 4819 flow [2024-06-03 20:43:30,212 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} [2024-06-03 20:43:30,212 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 228 predicate places. [2024-06-03 20:43:30,213 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 331 transitions, 4819 flow [2024-06-03 20:43:30,213 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) [2024-06-03 20:43:30,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:30,213 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] [2024-06-03 20:43:30,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-03 20:43:30,213 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)] === [2024-06-03 20:43:30,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:30,213 INFO L85 PathProgramCache]: Analyzing trace with hash 442540087, now seen corresponding path program 6 times [2024-06-03 20:43:30,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:30,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003131370] [2024-06-03 20:43:30,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:30,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:30,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:30,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:30,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:30,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003131370] [2024-06-03 20:43:30,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003131370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:30,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:30,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:43:30,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729252683] [2024-06-03 20:43:30,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:30,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:43:30,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:30,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:43:30,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:43:30,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:43:30,441 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) [2024-06-03 20:43:30,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:30,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:43:30,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:31,022 INFO L124 PetriNetUnfolderBase]: 2490/4216 cut-off events. [2024-06-03 20:43:31,022 INFO L125 PetriNetUnfolderBase]: For 371137/371137 co-relation queries the response was YES. [2024-06-03 20:43:31,053 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. [2024-06-03 20:43:31,066 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 185 selfloop transitions, 165 changer transitions 0/357 dead transitions. [2024-06-03 20:43:31,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 357 transitions, 6119 flow [2024-06-03 20:43:31,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:43:31,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:43:31,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 228 transitions. [2024-06-03 20:43:31,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-06-03 20:43:31,067 INFO L175 Difference]: Start difference. First operand has 271 places, 331 transitions, 4819 flow. Second operand 10 states and 228 transitions. [2024-06-03 20:43:31,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 357 transitions, 6119 flow [2024-06-03 20:43:31,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 357 transitions, 5872 flow, removed 76 selfloop flow, removed 6 redundant places. [2024-06-03 20:43:31,969 INFO L231 Difference]: Finished difference. Result has 275 places, 334 transitions, 5004 flow [2024-06-03 20:43:31,970 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} [2024-06-03 20:43:31,970 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-03 20:43:31,970 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 334 transitions, 5004 flow [2024-06-03 20:43:31,970 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) [2024-06-03 20:43:31,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:31,970 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] [2024-06-03 20:43:31,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-03 20:43:31,970 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)] === [2024-06-03 20:43:31,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:31,971 INFO L85 PathProgramCache]: Analyzing trace with hash -390214375, now seen corresponding path program 7 times [2024-06-03 20:43:31,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:31,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163197871] [2024-06-03 20:43:31,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:31,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:31,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:32,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:32,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:32,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163197871] [2024-06-03 20:43:32,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163197871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:32,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:32,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:43:32,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739682386] [2024-06-03 20:43:32,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:32,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:43:32,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:32,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:43:32,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:43:32,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:43:32,211 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) [2024-06-03 20:43:32,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:32,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:43:32,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:32,821 INFO L124 PetriNetUnfolderBase]: 2508/4247 cut-off events. [2024-06-03 20:43:32,821 INFO L125 PetriNetUnfolderBase]: For 386958/386958 co-relation queries the response was YES. [2024-06-03 20:43:32,851 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. [2024-06-03 20:43:32,863 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 190 selfloop transitions, 163 changer transitions 0/360 dead transitions. [2024-06-03 20:43:32,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 360 transitions, 6369 flow [2024-06-03 20:43:32,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:43:32,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:43:32,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-03 20:43:32,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5502645502645502 [2024-06-03 20:43:32,864 INFO L175 Difference]: Start difference. First operand has 275 places, 334 transitions, 5004 flow. Second operand 9 states and 208 transitions. [2024-06-03 20:43:32,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 360 transitions, 6369 flow [2024-06-03 20:43:33,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 360 transitions, 5998 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-03 20:43:33,488 INFO L231 Difference]: Finished difference. Result has 277 places, 341 transitions, 5127 flow [2024-06-03 20:43:33,488 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} [2024-06-03 20:43:33,488 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-03 20:43:33,488 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 341 transitions, 5127 flow [2024-06-03 20:43:33,489 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) [2024-06-03 20:43:33,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:33,489 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] [2024-06-03 20:43:33,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-03 20:43:33,489 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)] === [2024-06-03 20:43:33,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:33,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1381618293, now seen corresponding path program 8 times [2024-06-03 20:43:33,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:33,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332333139] [2024-06-03 20:43:33,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:33,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:33,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:33,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:33,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:33,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332333139] [2024-06-03 20:43:33,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332333139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:33,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:33,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:43:33,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777889317] [2024-06-03 20:43:33,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:33,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:43:33,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:33,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:43:33,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:43:33,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:43:33,721 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) [2024-06-03 20:43:33,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:33,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:43:33,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:34,309 INFO L124 PetriNetUnfolderBase]: 2526/4298 cut-off events. [2024-06-03 20:43:34,309 INFO L125 PetriNetUnfolderBase]: For 399018/399018 co-relation queries the response was YES. [2024-06-03 20:43:34,341 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. [2024-06-03 20:43:34,354 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 246 selfloop transitions, 120 changer transitions 0/373 dead transitions. [2024-06-03 20:43:34,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 373 transitions, 6371 flow [2024-06-03 20:43:34,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:43:34,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:43:34,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-03 20:43:34,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-03 20:43:34,355 INFO L175 Difference]: Start difference. First operand has 277 places, 341 transitions, 5127 flow. Second operand 7 states and 179 transitions. [2024-06-03 20:43:34,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 373 transitions, 6371 flow [2024-06-03 20:43:35,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 373 transitions, 5990 flow, removed 54 selfloop flow, removed 5 redundant places. [2024-06-03 20:43:35,197 INFO L231 Difference]: Finished difference. Result has 280 places, 347 transitions, 5193 flow [2024-06-03 20:43:35,198 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} [2024-06-03 20:43:35,198 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 237 predicate places. [2024-06-03 20:43:35,198 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 347 transitions, 5193 flow [2024-06-03 20:43:35,198 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) [2024-06-03 20:43:35,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:35,198 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] [2024-06-03 20:43:35,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-03 20:43:35,198 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)] === [2024-06-03 20:43:35,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:35,199 INFO L85 PathProgramCache]: Analyzing trace with hash 95936054, now seen corresponding path program 1 times [2024-06-03 20:43:35,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:35,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933599131] [2024-06-03 20:43:35,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:35,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:35,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:35,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:35,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:35,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933599131] [2024-06-03 20:43:35,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933599131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:35,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:35,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:43:35,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39017711] [2024-06-03 20:43:35,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:35,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:43:35,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:35,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:43:35,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:43:35,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:43:35,503 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) [2024-06-03 20:43:35,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:35,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:43:35,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:36,258 INFO L124 PetriNetUnfolderBase]: 2751/4699 cut-off events. [2024-06-03 20:43:36,259 INFO L125 PetriNetUnfolderBase]: For 537888/537892 co-relation queries the response was YES. [2024-06-03 20:43:36,296 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. [2024-06-03 20:43:36,312 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 266 selfloop transitions, 114 changer transitions 0/387 dead transitions. [2024-06-03 20:43:36,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 387 transitions, 6567 flow [2024-06-03 20:43:36,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:43:36,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:43:36,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-03 20:43:36,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5582010582010583 [2024-06-03 20:43:36,313 INFO L175 Difference]: Start difference. First operand has 280 places, 347 transitions, 5193 flow. Second operand 9 states and 211 transitions. [2024-06-03 20:43:36,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 387 transitions, 6567 flow [2024-06-03 20:43:37,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 387 transitions, 6441 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-03 20:43:37,298 INFO L231 Difference]: Finished difference. Result has 288 places, 353 transitions, 5477 flow [2024-06-03 20:43:37,298 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} [2024-06-03 20:43:37,298 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 245 predicate places. [2024-06-03 20:43:37,298 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 353 transitions, 5477 flow [2024-06-03 20:43:37,298 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) [2024-06-03 20:43:37,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:37,299 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] [2024-06-03 20:43:37,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-03 20:43:37,299 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)] === [2024-06-03 20:43:37,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:37,299 INFO L85 PathProgramCache]: Analyzing trace with hash -415672138, now seen corresponding path program 2 times [2024-06-03 20:43:37,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:37,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376421993] [2024-06-03 20:43:37,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:37,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:37,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:37,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:37,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:37,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376421993] [2024-06-03 20:43:37,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376421993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:37,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:37,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:43:37,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090424419] [2024-06-03 20:43:37,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:37,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:43:37,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:37,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:43:37,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:43:37,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:43:37,569 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) [2024-06-03 20:43:37,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:37,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:43:37,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:38,437 INFO L124 PetriNetUnfolderBase]: 2903/4931 cut-off events. [2024-06-03 20:43:38,437 INFO L125 PetriNetUnfolderBase]: For 613008/613012 co-relation queries the response was YES. [2024-06-03 20:43:38,475 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. [2024-06-03 20:43:38,490 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 270 selfloop transitions, 105 changer transitions 0/382 dead transitions. [2024-06-03 20:43:38,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 382 transitions, 6589 flow [2024-06-03 20:43:38,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:43:38,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:43:38,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 205 transitions. [2024-06-03 20:43:38,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5423280423280423 [2024-06-03 20:43:38,492 INFO L175 Difference]: Start difference. First operand has 288 places, 353 transitions, 5477 flow. Second operand 9 states and 205 transitions. [2024-06-03 20:43:38,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 382 transitions, 6589 flow [2024-06-03 20:43:39,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 382 transitions, 6426 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-03 20:43:39,616 INFO L231 Difference]: Finished difference. Result has 294 places, 357 transitions, 5639 flow [2024-06-03 20:43:39,617 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} [2024-06-03 20:43:39,617 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2024-06-03 20:43:39,617 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 357 transitions, 5639 flow [2024-06-03 20:43:39,617 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) [2024-06-03 20:43:39,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:39,617 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] [2024-06-03 20:43:39,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-03 20:43:39,618 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)] === [2024-06-03 20:43:39,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:39,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1217190414, now seen corresponding path program 3 times [2024-06-03 20:43:39,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:39,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146678100] [2024-06-03 20:43:39,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:39,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:39,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:39,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:39,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:39,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146678100] [2024-06-03 20:43:39,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146678100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:39,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:39,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:43:39,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607801752] [2024-06-03 20:43:39,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:39,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:43:39,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:39,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:43:39,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:43:39,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:43:39,908 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) [2024-06-03 20:43:39,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:39,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:43:39,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:40,670 INFO L124 PetriNetUnfolderBase]: 2913/4961 cut-off events. [2024-06-03 20:43:40,671 INFO L125 PetriNetUnfolderBase]: For 615264/615268 co-relation queries the response was YES. [2024-06-03 20:43:40,712 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. [2024-06-03 20:43:40,728 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 265 selfloop transitions, 107 changer transitions 0/379 dead transitions. [2024-06-03 20:43:40,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 379 transitions, 6501 flow [2024-06-03 20:43:40,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:43:40,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:43:40,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-03 20:43:40,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5343915343915344 [2024-06-03 20:43:40,729 INFO L175 Difference]: Start difference. First operand has 294 places, 357 transitions, 5639 flow. Second operand 9 states and 202 transitions. [2024-06-03 20:43:40,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 379 transitions, 6501 flow [2024-06-03 20:43:42,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 379 transitions, 6336 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-03 20:43:42,282 INFO L231 Difference]: Finished difference. Result has 298 places, 359 transitions, 5752 flow [2024-06-03 20:43:42,282 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} [2024-06-03 20:43:42,283 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 255 predicate places. [2024-06-03 20:43:42,283 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 359 transitions, 5752 flow [2024-06-03 20:43:42,283 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) [2024-06-03 20:43:42,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:42,283 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] [2024-06-03 20:43:42,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-03 20:43:42,284 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)] === [2024-06-03 20:43:42,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:42,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1355718564, now seen corresponding path program 4 times [2024-06-03 20:43:42,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:42,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980936303] [2024-06-03 20:43:42,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:42,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:42,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:42,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:42,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:42,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980936303] [2024-06-03 20:43:42,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980936303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:42,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:42,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:43:42,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754621603] [2024-06-03 20:43:42,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:42,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:43:42,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:42,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:43:42,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:43:42,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:43:42,581 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) [2024-06-03 20:43:42,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:42,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:43:42,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:43,362 INFO L124 PetriNetUnfolderBase]: 2969/5030 cut-off events. [2024-06-03 20:43:43,362 INFO L125 PetriNetUnfolderBase]: For 636156/636156 co-relation queries the response was YES. [2024-06-03 20:43:43,404 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. [2024-06-03 20:43:43,421 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 312 selfloop transitions, 61 changer transitions 0/380 dead transitions. [2024-06-03 20:43:43,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 380 transitions, 6615 flow [2024-06-03 20:43:43,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:43:43,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:43:43,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-03 20:43:43,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5386904761904762 [2024-06-03 20:43:43,422 INFO L175 Difference]: Start difference. First operand has 298 places, 359 transitions, 5752 flow. Second operand 8 states and 181 transitions. [2024-06-03 20:43:43,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 380 transitions, 6615 flow [2024-06-03 20:43:44,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 380 transitions, 6369 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-03 20:43:44,898 INFO L231 Difference]: Finished difference. Result has 299 places, 361 transitions, 5693 flow [2024-06-03 20:43:44,898 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} [2024-06-03 20:43:44,899 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 256 predicate places. [2024-06-03 20:43:44,899 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 361 transitions, 5693 flow [2024-06-03 20:43:44,899 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) [2024-06-03 20:43:44,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:44,899 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] [2024-06-03 20:43:44,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-03 20:43:44,899 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)] === [2024-06-03 20:43:44,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:44,899 INFO L85 PathProgramCache]: Analyzing trace with hash -536439212, now seen corresponding path program 5 times [2024-06-03 20:43:44,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:44,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764583438] [2024-06-03 20:43:44,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:44,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:44,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:45,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:45,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:45,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764583438] [2024-06-03 20:43:45,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764583438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:45,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:45,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:43:45,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837825050] [2024-06-03 20:43:45,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:45,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:43:45,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:45,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:43:45,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:43:45,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:43:45,243 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) [2024-06-03 20:43:45,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:45,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:43:45,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:46,185 INFO L124 PetriNetUnfolderBase]: 3108/5277 cut-off events. [2024-06-03 20:43:46,186 INFO L125 PetriNetUnfolderBase]: For 692154/692154 co-relation queries the response was YES. [2024-06-03 20:43:46,227 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. [2024-06-03 20:43:46,243 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 273 selfloop transitions, 111 changer transitions 0/391 dead transitions. [2024-06-03 20:43:46,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 391 transitions, 6853 flow [2024-06-03 20:43:46,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:43:46,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:43:46,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-03 20:43:46,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-03 20:43:46,244 INFO L175 Difference]: Start difference. First operand has 299 places, 361 transitions, 5693 flow. Second operand 10 states and 225 transitions. [2024-06-03 20:43:46,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 391 transitions, 6853 flow [2024-06-03 20:43:47,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 391 transitions, 6713 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-03 20:43:47,338 INFO L231 Difference]: Finished difference. Result has 305 places, 365 transitions, 5911 flow [2024-06-03 20:43:47,338 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} [2024-06-03 20:43:47,338 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 262 predicate places. [2024-06-03 20:43:47,339 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 365 transitions, 5911 flow [2024-06-03 20:43:47,339 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) [2024-06-03 20:43:47,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:47,339 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] [2024-06-03 20:43:47,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-03 20:43:47,339 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)] === [2024-06-03 20:43:47,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:47,339 INFO L85 PathProgramCache]: Analyzing trace with hash -530928962, now seen corresponding path program 6 times [2024-06-03 20:43:47,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:47,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390956565] [2024-06-03 20:43:47,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:47,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:47,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:47,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:47,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:47,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390956565] [2024-06-03 20:43:47,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390956565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:47,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:47,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:43:47,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789280011] [2024-06-03 20:43:47,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:47,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:43:47,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:47,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:43:47,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:43:47,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:43:47,621 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) [2024-06-03 20:43:47,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:47,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:43:47,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:48,567 INFO L124 PetriNetUnfolderBase]: 3118/5291 cut-off events. [2024-06-03 20:43:48,567 INFO L125 PetriNetUnfolderBase]: For 697587/697587 co-relation queries the response was YES. [2024-06-03 20:43:48,621 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. [2024-06-03 20:43:48,643 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 264 selfloop transitions, 119 changer transitions 0/390 dead transitions. [2024-06-03 20:43:48,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 390 transitions, 6811 flow [2024-06-03 20:43:48,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:43:48,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:43:48,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 260 transitions. [2024-06-03 20:43:48,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158730158730159 [2024-06-03 20:43:48,644 INFO L175 Difference]: Start difference. First operand has 305 places, 365 transitions, 5911 flow. Second operand 12 states and 260 transitions. [2024-06-03 20:43:48,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 390 transitions, 6811 flow [2024-06-03 20:43:50,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 390 transitions, 6669 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-03 20:43:50,180 INFO L231 Difference]: Finished difference. Result has 312 places, 367 transitions, 6081 flow [2024-06-03 20:43:50,181 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} [2024-06-03 20:43:50,181 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-03 20:43:50,181 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 367 transitions, 6081 flow [2024-06-03 20:43:50,182 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) [2024-06-03 20:43:50,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:50,182 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] [2024-06-03 20:43:50,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-03 20:43:50,182 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)] === [2024-06-03 20:43:50,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:50,183 INFO L85 PathProgramCache]: Analyzing trace with hash -530713760, now seen corresponding path program 1 times [2024-06-03 20:43:50,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:50,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110100454] [2024-06-03 20:43:50,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:50,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:50,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:50,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:50,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:50,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110100454] [2024-06-03 20:43:50,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110100454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:50,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:50,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:43:50,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796682879] [2024-06-03 20:43:50,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:50,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:43:50,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:50,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:43:50,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:43:50,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:43:50,468 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) [2024-06-03 20:43:50,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:50,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:43:50,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:51,430 INFO L124 PetriNetUnfolderBase]: 3125/5310 cut-off events. [2024-06-03 20:43:51,430 INFO L125 PetriNetUnfolderBase]: For 672479/672479 co-relation queries the response was YES. [2024-06-03 20:43:51,481 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. [2024-06-03 20:43:51,502 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 262 selfloop transitions, 126 changer transitions 0/395 dead transitions. [2024-06-03 20:43:51,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 395 transitions, 6999 flow [2024-06-03 20:43:51,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:43:51,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:43:51,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 262 transitions. [2024-06-03 20:43:51,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5198412698412699 [2024-06-03 20:43:51,503 INFO L175 Difference]: Start difference. First operand has 312 places, 367 transitions, 6081 flow. Second operand 12 states and 262 transitions. [2024-06-03 20:43:51,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 395 transitions, 6999 flow [2024-06-03 20:43:53,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 395 transitions, 6721 flow, removed 22 selfloop flow, removed 10 redundant places. [2024-06-03 20:43:53,361 INFO L231 Difference]: Finished difference. Result has 314 places, 369 transitions, 6122 flow [2024-06-03 20:43:53,361 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} [2024-06-03 20:43:53,361 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-03 20:43:53,361 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 369 transitions, 6122 flow [2024-06-03 20:43:53,362 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) [2024-06-03 20:43:53,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:53,362 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] [2024-06-03 20:43:53,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-03 20:43:53,362 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)] === [2024-06-03 20:43:53,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:53,362 INFO L85 PathProgramCache]: Analyzing trace with hash -953718702, now seen corresponding path program 7 times [2024-06-03 20:43:53,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:53,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659881060] [2024-06-03 20:43:53,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:53,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:53,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:53,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:53,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:53,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659881060] [2024-06-03 20:43:53,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659881060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:53,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:53,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:43:53,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113956204] [2024-06-03 20:43:53,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:53,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:43:53,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:53,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:43:53,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:43:53,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:43:53,621 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) [2024-06-03 20:43:53,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:53,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:43:53,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:54,506 INFO L124 PetriNetUnfolderBase]: 3257/5525 cut-off events. [2024-06-03 20:43:54,506 INFO L125 PetriNetUnfolderBase]: For 796177/796177 co-relation queries the response was YES. [2024-06-03 20:43:54,554 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. [2024-06-03 20:43:54,571 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 281 selfloop transitions, 97 changer transitions 7/392 dead transitions. [2024-06-03 20:43:54,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 392 transitions, 7017 flow [2024-06-03 20:43:54,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:43:54,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:43:54,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-03 20:43:54,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684523809523809 [2024-06-03 20:43:54,572 INFO L175 Difference]: Start difference. First operand has 314 places, 369 transitions, 6122 flow. Second operand 8 states and 191 transitions. [2024-06-03 20:43:54,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 392 transitions, 7017 flow [2024-06-03 20:43:56,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 392 transitions, 6716 flow, removed 26 selfloop flow, removed 10 redundant places. [2024-06-03 20:43:56,176 INFO L231 Difference]: Finished difference. Result has 312 places, 366 transitions, 5999 flow [2024-06-03 20:43:56,176 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} [2024-06-03 20:43:56,176 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-03 20:43:56,176 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 366 transitions, 5999 flow [2024-06-03 20:43:56,176 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) [2024-06-03 20:43:56,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:56,177 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] [2024-06-03 20:43:56,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-03 20:43:56,177 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)] === [2024-06-03 20:43:56,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:56,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1258908628, now seen corresponding path program 8 times [2024-06-03 20:43:56,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:56,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302937372] [2024-06-03 20:43:56,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:56,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:56,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:56,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:56,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:56,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302937372] [2024-06-03 20:43:56,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302937372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:56,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:56,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:43:56,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526944657] [2024-06-03 20:43:56,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:56,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:43:56,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:56,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:43:56,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:43:56,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:43:56,438 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) [2024-06-03 20:43:56,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:56,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:43:56,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:57,414 INFO L124 PetriNetUnfolderBase]: 3199/5445 cut-off events. [2024-06-03 20:43:57,414 INFO L125 PetriNetUnfolderBase]: For 745671/745671 co-relation queries the response was YES. [2024-06-03 20:43:57,457 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. [2024-06-03 20:43:57,472 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 288 selfloop transitions, 89 changer transitions 6/390 dead transitions. [2024-06-03 20:43:57,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 390 transitions, 6876 flow [2024-06-03 20:43:57,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:43:57,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:43:57,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-03 20:43:57,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5918367346938775 [2024-06-03 20:43:57,473 INFO L175 Difference]: Start difference. First operand has 312 places, 366 transitions, 5999 flow. Second operand 7 states and 174 transitions. [2024-06-03 20:43:57,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 390 transitions, 6876 flow [2024-06-03 20:43:58,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 390 transitions, 6658 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-03 20:43:58,970 INFO L231 Difference]: Finished difference. Result has 313 places, 363 transitions, 5930 flow [2024-06-03 20:43:58,970 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} [2024-06-03 20:43:58,971 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 270 predicate places. [2024-06-03 20:43:58,971 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 363 transitions, 5930 flow [2024-06-03 20:43:58,971 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) [2024-06-03 20:43:58,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:58,971 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] [2024-06-03 20:43:58,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-03 20:43:58,972 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)] === [2024-06-03 20:43:58,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:58,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1324514492, now seen corresponding path program 9 times [2024-06-03 20:43:58,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:58,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664497349] [2024-06-03 20:43:58,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:58,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:58,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:59,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:59,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:59,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664497349] [2024-06-03 20:43:59,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664497349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:59,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:59,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:43:59,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347898932] [2024-06-03 20:43:59,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:59,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:43:59,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:59,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:43:59,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:43:59,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:43:59,230 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) [2024-06-03 20:43:59,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:59,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:43:59,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:44:00,109 INFO L124 PetriNetUnfolderBase]: 3198/5476 cut-off events. [2024-06-03 20:44:00,109 INFO L125 PetriNetUnfolderBase]: For 717242/717242 co-relation queries the response was YES. [2024-06-03 20:44:00,157 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. [2024-06-03 20:44:00,175 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 291 selfloop transitions, 93 changer transitions 7/398 dead transitions. [2024-06-03 20:44:00,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 398 transitions, 7071 flow [2024-06-03 20:44:00,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:44:00,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:44:00,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-03 20:44:00,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6224489795918368 [2024-06-03 20:44:00,176 INFO L175 Difference]: Start difference. First operand has 313 places, 363 transitions, 5930 flow. Second operand 7 states and 183 transitions. [2024-06-03 20:44:00,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 398 transitions, 7071 flow [2024-06-03 20:44:01,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 398 transitions, 6865 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-03 20:44:01,763 INFO L231 Difference]: Finished difference. Result has 316 places, 361 transitions, 5916 flow [2024-06-03 20:44:01,763 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} [2024-06-03 20:44:01,763 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 273 predicate places. [2024-06-03 20:44:01,763 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 361 transitions, 5916 flow [2024-06-03 20:44:01,763 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) [2024-06-03 20:44:01,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:44:01,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:44:01,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-03 20:44:01,764 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)] === [2024-06-03 20:44:01,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:44:01,764 INFO L85 PathProgramCache]: Analyzing trace with hash -260512732, now seen corresponding path program 2 times [2024-06-03 20:44:01,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:44:01,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507382984] [2024-06-03 20:44:01,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:44:01,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:44:01,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:44:02,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:44:02,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:44:02,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507382984] [2024-06-03 20:44:02,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507382984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:44:02,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:44:02,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:44:02,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545549872] [2024-06-03 20:44:02,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:44:02,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:44:02,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:44:02,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:44:02,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:44:02,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:44:02,103 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) [2024-06-03 20:44:02,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:44:02,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:44:02,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:44:03,039 INFO L124 PetriNetUnfolderBase]: 2952/5050 cut-off events. [2024-06-03 20:44:03,039 INFO L125 PetriNetUnfolderBase]: For 590718/590718 co-relation queries the response was YES. [2024-06-03 20:44:03,083 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. [2024-06-03 20:44:03,099 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 272 selfloop transitions, 95 changer transitions 15/389 dead transitions. [2024-06-03 20:44:03,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 389 transitions, 6817 flow [2024-06-03 20:44:03,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:44:03,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:44:03,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-03 20:44:03,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-03 20:44:03,101 INFO L175 Difference]: Start difference. First operand has 316 places, 361 transitions, 5916 flow. Second operand 8 states and 196 transitions. [2024-06-03 20:44:03,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 389 transitions, 6817 flow [2024-06-03 20:44:04,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 389 transitions, 6325 flow, removed 49 selfloop flow, removed 9 redundant places. [2024-06-03 20:44:04,756 INFO L231 Difference]: Finished difference. Result has 315 places, 352 transitions, 5485 flow [2024-06-03 20:44:04,756 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} [2024-06-03 20:44:04,757 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 272 predicate places. [2024-06-03 20:44:04,757 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 352 transitions, 5485 flow [2024-06-03 20:44:04,757 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) [2024-06-03 20:44:04,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:44:04,757 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] [2024-06-03 20:44:04,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-03 20:44:04,757 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)] === [2024-06-03 20:44:04,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:44:04,757 INFO L85 PathProgramCache]: Analyzing trace with hash -121803464, now seen corresponding path program 1 times [2024-06-03 20:44:04,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:44:04,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108401490] [2024-06-03 20:44:04,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:44:04,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:44:04,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:44:04,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:44:04,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:44:04,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108401490] [2024-06-03 20:44:04,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108401490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:44:04,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:44:04,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:44:04,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524432820] [2024-06-03 20:44:04,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:44:04,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:44:04,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:44:04,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:44:04,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:44:05,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:44:05,018 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) [2024-06-03 20:44:05,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:44:05,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:44:05,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:44:05,754 INFO L124 PetriNetUnfolderBase]: 2760/4731 cut-off events. [2024-06-03 20:44:05,754 INFO L125 PetriNetUnfolderBase]: For 458656/458656 co-relation queries the response was YES. [2024-06-03 20:44:05,798 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. [2024-06-03 20:44:05,946 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 345 selfloop transitions, 36 changer transitions 0/388 dead transitions. [2024-06-03 20:44:05,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 388 transitions, 6551 flow [2024-06-03 20:44:05,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:44:05,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:44:05,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 226 transitions. [2024-06-03 20:44:05,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5380952380952381 [2024-06-03 20:44:05,947 INFO L175 Difference]: Start difference. First operand has 315 places, 352 transitions, 5485 flow. Second operand 10 states and 226 transitions. [2024-06-03 20:44:05,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 388 transitions, 6551 flow [2024-06-03 20:44:07,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 388 transitions, 6284 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-03 20:44:07,149 INFO L231 Difference]: Finished difference. Result has 319 places, 355 transitions, 5342 flow [2024-06-03 20:44:07,149 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} [2024-06-03 20:44:07,150 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 276 predicate places. [2024-06-03 20:44:07,150 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 355 transitions, 5342 flow [2024-06-03 20:44:07,150 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) [2024-06-03 20:44:07,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:44:07,150 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] [2024-06-03 20:44:07,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-03 20:44:07,150 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)] === [2024-06-03 20:44:07,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:44:07,151 INFO L85 PathProgramCache]: Analyzing trace with hash 303185336, now seen corresponding path program 2 times [2024-06-03 20:44:07,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:44:07,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555260423] [2024-06-03 20:44:07,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:44:07,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:44:07,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:44:07,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:44:07,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:44:07,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555260423] [2024-06-03 20:44:07,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555260423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:44:07,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:44:07,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:44:07,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395998010] [2024-06-03 20:44:07,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:44:07,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:44:07,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:44:07,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:44:07,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:44:07,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:44:07,435 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) [2024-06-03 20:44:07,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:44:07,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:44:07,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:44:08,268 INFO L124 PetriNetUnfolderBase]: 2757/4727 cut-off events. [2024-06-03 20:44:08,269 INFO L125 PetriNetUnfolderBase]: For 452441/452441 co-relation queries the response was YES. [2024-06-03 20:44:08,314 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. [2024-06-03 20:44:08,332 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 344 selfloop transitions, 35 changer transitions 0/386 dead transitions. [2024-06-03 20:44:08,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 386 transitions, 6178 flow [2024-06-03 20:44:08,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:44:08,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:44:08,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-03 20:44:08,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5502645502645502 [2024-06-03 20:44:08,333 INFO L175 Difference]: Start difference. First operand has 319 places, 355 transitions, 5342 flow. Second operand 9 states and 208 transitions. [2024-06-03 20:44:08,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 386 transitions, 6178 flow [2024-06-03 20:44:09,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 386 transitions, 6074 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-03 20:44:09,977 INFO L231 Difference]: Finished difference. Result has 320 places, 355 transitions, 5314 flow [2024-06-03 20:44:09,977 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} [2024-06-03 20:44:09,977 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-03 20:44:09,978 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 355 transitions, 5314 flow [2024-06-03 20:44:09,978 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) [2024-06-03 20:44:09,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:44:09,978 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] [2024-06-03 20:44:09,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-03 20:44:09,978 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)] === [2024-06-03 20:44:09,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:44:09,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1887495590, now seen corresponding path program 1 times [2024-06-03 20:44:09,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:44:09,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931496096] [2024-06-03 20:44:09,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:44:09,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:44:09,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:44:10,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:44:10,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:44:10,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931496096] [2024-06-03 20:44:10,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931496096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:44:10,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:44:10,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:44:10,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096447066] [2024-06-03 20:44:10,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:44:10,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:44:10,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:44:10,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:44:10,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:44:10,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:44:10,236 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) [2024-06-03 20:44:10,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:44:10,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:44:10,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:44:11,097 INFO L124 PetriNetUnfolderBase]: 2770/4740 cut-off events. [2024-06-03 20:44:11,097 INFO L125 PetriNetUnfolderBase]: For 467175/467175 co-relation queries the response was YES. [2024-06-03 20:44:11,136 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. [2024-06-03 20:44:11,152 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 249 selfloop transitions, 123 changer transitions 0/379 dead transitions. [2024-06-03 20:44:11,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 379 transitions, 6397 flow [2024-06-03 20:44:11,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:44:11,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:44:11,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-03 20:44:11,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-03 20:44:11,153 INFO L175 Difference]: Start difference. First operand has 320 places, 355 transitions, 5314 flow. Second operand 7 states and 173 transitions. [2024-06-03 20:44:11,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 379 transitions, 6397 flow [2024-06-03 20:44:12,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 379 transitions, 6327 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-03 20:44:12,764 INFO L231 Difference]: Finished difference. Result has 320 places, 361 transitions, 5710 flow [2024-06-03 20:44:12,764 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} [2024-06-03 20:44:12,764 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-03 20:44:12,764 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 361 transitions, 5710 flow [2024-06-03 20:44:12,765 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) [2024-06-03 20:44:12,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:44:12,765 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] [2024-06-03 20:44:12,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-03 20:44:12,765 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)] === [2024-06-03 20:44:12,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:44:12,765 INFO L85 PathProgramCache]: Analyzing trace with hash -97231670, now seen corresponding path program 3 times [2024-06-03 20:44:12,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:44:12,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28778001] [2024-06-03 20:44:12,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:44:12,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:44:12,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:44:12,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:44:12,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:44:12,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28778001] [2024-06-03 20:44:12,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28778001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:44:12,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:44:12,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:44:12,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796003901] [2024-06-03 20:44:12,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:44:12,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:44:12,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:44:12,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:44:12,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:44:13,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:44:13,014 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) [2024-06-03 20:44:13,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:44:13,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:44:13,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:44:13,872 INFO L124 PetriNetUnfolderBase]: 2824/4831 cut-off events. [2024-06-03 20:44:13,872 INFO L125 PetriNetUnfolderBase]: For 500966/500966 co-relation queries the response was YES. [2024-06-03 20:44:13,916 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. [2024-06-03 20:44:13,931 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 293 selfloop transitions, 115 changer transitions 0/415 dead transitions. [2024-06-03 20:44:13,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 415 transitions, 7676 flow [2024-06-03 20:44:13,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:44:13,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:44:13,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 228 transitions. [2024-06-03 20:44:13,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-06-03 20:44:13,932 INFO L175 Difference]: Start difference. First operand has 320 places, 361 transitions, 5710 flow. Second operand 10 states and 228 transitions. [2024-06-03 20:44:13,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 415 transitions, 7676 flow [2024-06-03 20:44:15,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 415 transitions, 7451 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-03 20:44:15,602 INFO L231 Difference]: Finished difference. Result has 326 places, 384 transitions, 6282 flow [2024-06-03 20:44:15,602 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} [2024-06-03 20:44:15,602 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-03 20:44:15,602 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 384 transitions, 6282 flow [2024-06-03 20:44:15,603 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) [2024-06-03 20:44:15,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:44:15,603 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] [2024-06-03 20:44:15,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-03 20:44:15,603 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)] === [2024-06-03 20:44:15,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:44:15,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1790424286, now seen corresponding path program 4 times [2024-06-03 20:44:15,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:44:15,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665520497] [2024-06-03 20:44:15,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:44:15,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:44:15,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:44:15,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:44:15,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:44:15,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665520497] [2024-06-03 20:44:15,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665520497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:44:15,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:44:15,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:44:15,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143935847] [2024-06-03 20:44:15,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:44:15,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:44:15,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:44:15,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:44:15,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:44:15,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:44:15,820 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) [2024-06-03 20:44:15,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:44:15,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:44:15,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:44:16,692 INFO L124 PetriNetUnfolderBase]: 2869/4906 cut-off events. [2024-06-03 20:44:16,693 INFO L125 PetriNetUnfolderBase]: For 524727/524727 co-relation queries the response was YES. [2024-06-03 20:44:16,735 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. [2024-06-03 20:44:16,752 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 193 selfloop transitions, 224 changer transitions 0/424 dead transitions. [2024-06-03 20:44:16,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 424 transitions, 8203 flow [2024-06-03 20:44:16,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:44:16,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:44:16,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 234 transitions. [2024-06-03 20:44:16,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5571428571428572 [2024-06-03 20:44:16,753 INFO L175 Difference]: Start difference. First operand has 326 places, 384 transitions, 6282 flow. Second operand 10 states and 234 transitions. [2024-06-03 20:44:16,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 424 transitions, 8203 flow [2024-06-03 20:44:18,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 424 transitions, 7985 flow, removed 79 selfloop flow, removed 4 redundant places. [2024-06-03 20:44:18,649 INFO L231 Difference]: Finished difference. Result has 332 places, 397 transitions, 6813 flow [2024-06-03 20:44:18,649 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} [2024-06-03 20:44:18,650 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 289 predicate places. [2024-06-03 20:44:18,650 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 397 transitions, 6813 flow [2024-06-03 20:44:18,650 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) [2024-06-03 20:44:18,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:44:18,650 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] [2024-06-03 20:44:18,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-03 20:44:18,650 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)] === [2024-06-03 20:44:18,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:44:18,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1410783828, now seen corresponding path program 5 times [2024-06-03 20:44:18,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:44:18,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533527431] [2024-06-03 20:44:18,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:44:18,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:44:18,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:44:18,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:44:18,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:44:18,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533527431] [2024-06-03 20:44:18,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533527431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:44:18,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:44:18,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:44:18,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033174055] [2024-06-03 20:44:18,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:44:18,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:44:18,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:44:18,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:44:18,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:44:18,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:44:18,965 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) [2024-06-03 20:44:18,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:44:18,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:44:18,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:44:19,895 INFO L124 PetriNetUnfolderBase]: 2898/4955 cut-off events. [2024-06-03 20:44:19,895 INFO L125 PetriNetUnfolderBase]: For 550372/550372 co-relation queries the response was YES. [2024-06-03 20:44:19,946 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. [2024-06-03 20:44:19,965 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 203 selfloop transitions, 232 changer transitions 0/442 dead transitions. [2024-06-03 20:44:19,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 442 transitions, 8555 flow [2024-06-03 20:44:19,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 20:44:19,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 20:44:19,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 294 transitions. [2024-06-03 20:44:19,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2024-06-03 20:44:19,968 INFO L175 Difference]: Start difference. First operand has 332 places, 397 transitions, 6813 flow. Second operand 13 states and 294 transitions. [2024-06-03 20:44:19,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 442 transitions, 8555 flow [2024-06-03 20:44:22,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 442 transitions, 8159 flow, removed 57 selfloop flow, removed 5 redundant places. [2024-06-03 20:44:22,154 INFO L231 Difference]: Finished difference. Result has 340 places, 407 transitions, 7123 flow [2024-06-03 20:44:22,154 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} [2024-06-03 20:44:22,154 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 297 predicate places. [2024-06-03 20:44:22,154 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 407 transitions, 7123 flow [2024-06-03 20:44:22,154 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) [2024-06-03 20:44:22,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:44:22,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:44:22,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-03 20:44:22,155 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)] === [2024-06-03 20:44:22,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:44:22,155 INFO L85 PathProgramCache]: Analyzing trace with hash -547906796, now seen corresponding path program 2 times [2024-06-03 20:44:22,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:44:22,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419060985] [2024-06-03 20:44:22,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:44:22,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:44:22,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:44:22,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:44:22,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:44:22,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419060985] [2024-06-03 20:44:22,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419060985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:44:22,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:44:22,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:44:22,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522131296] [2024-06-03 20:44:22,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:44:22,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:44:22,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:44:22,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:44:22,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:44:22,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:44:22,379 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) [2024-06-03 20:44:22,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:44:22,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:44:22,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:44:23,272 INFO L124 PetriNetUnfolderBase]: 2903/4938 cut-off events. [2024-06-03 20:44:23,272 INFO L125 PetriNetUnfolderBase]: For 564680/564680 co-relation queries the response was YES. [2024-06-03 20:44:23,323 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. [2024-06-03 20:44:23,343 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 222 selfloop transitions, 203 changer transitions 0/432 dead transitions. [2024-06-03 20:44:23,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 432 transitions, 8472 flow [2024-06-03 20:44:23,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:44:23,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:44:23,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 224 transitions. [2024-06-03 20:44:23,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-03 20:44:23,344 INFO L175 Difference]: Start difference. First operand has 340 places, 407 transitions, 7123 flow. Second operand 10 states and 224 transitions. [2024-06-03 20:44:23,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 432 transitions, 8472 flow [2024-06-03 20:44:25,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 432 transitions, 7792 flow, removed 34 selfloop flow, removed 11 redundant places. [2024-06-03 20:44:25,497 INFO L231 Difference]: Finished difference. Result has 339 places, 410 transitions, 6931 flow [2024-06-03 20:44:25,498 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} [2024-06-03 20:44:25,498 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 296 predicate places. [2024-06-03 20:44:25,498 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 410 transitions, 6931 flow [2024-06-03 20:44:25,498 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) [2024-06-03 20:44:25,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:44:25,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:44:25,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-03 20:44:25,498 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)] === [2024-06-03 20:44:25,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:44:25,499 INFO L85 PathProgramCache]: Analyzing trace with hash -306532820, now seen corresponding path program 6 times [2024-06-03 20:44:25,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:44:25,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112162185] [2024-06-03 20:44:25,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:44:25,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:44:25,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:44:25,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:44:25,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:44:25,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112162185] [2024-06-03 20:44:25,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112162185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:44:25,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:44:25,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:44:25,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644976094] [2024-06-03 20:44:25,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:44:25,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:44:25,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:44:25,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:44:25,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:44:25,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:44:25,803 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) [2024-06-03 20:44:25,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:44:25,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:44:25,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:44:26,702 INFO L124 PetriNetUnfolderBase]: 2908/4977 cut-off events. [2024-06-03 20:44:26,703 INFO L125 PetriNetUnfolderBase]: For 572745/572745 co-relation queries the response was YES. [2024-06-03 20:44:26,750 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. [2024-06-03 20:44:26,769 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 310 selfloop transitions, 126 changer transitions 0/443 dead transitions. [2024-06-03 20:44:26,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 443 transitions, 8159 flow [2024-06-03 20:44:26,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:44:26,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:44:26,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 244 transitions. [2024-06-03 20:44:26,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5281385281385281 [2024-06-03 20:44:26,770 INFO L175 Difference]: Start difference. First operand has 339 places, 410 transitions, 6931 flow. Second operand 11 states and 244 transitions. [2024-06-03 20:44:26,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 443 transitions, 8159 flow [2024-06-03 20:44:29,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 443 transitions, 7708 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-03 20:44:29,395 INFO L231 Difference]: Finished difference. Result has 344 places, 415 transitions, 6915 flow [2024-06-03 20:44:29,396 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} [2024-06-03 20:44:29,396 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 301 predicate places. [2024-06-03 20:44:29,396 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 415 transitions, 6915 flow [2024-06-03 20:44:29,396 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) [2024-06-03 20:44:29,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:44:29,397 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] [2024-06-03 20:44:29,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-03 20:44:29,397 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)] === [2024-06-03 20:44:29,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:44:29,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1085922738, now seen corresponding path program 7 times [2024-06-03 20:44:29,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:44:29,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573310116] [2024-06-03 20:44:29,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:44:29,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:44:29,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:44:29,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:44:29,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:44:29,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573310116] [2024-06-03 20:44:29,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573310116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:44:29,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:44:29,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:44:29,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702865980] [2024-06-03 20:44:29,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:44:29,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:44:29,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:44:29,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:44:29,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:44:29,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:44:29,692 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) [2024-06-03 20:44:29,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:44:29,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:44:29,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:44:30,595 INFO L124 PetriNetUnfolderBase]: 2905/4965 cut-off events. [2024-06-03 20:44:30,595 INFO L125 PetriNetUnfolderBase]: For 576652/576652 co-relation queries the response was YES. [2024-06-03 20:44:30,648 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. [2024-06-03 20:44:30,667 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 198 selfloop transitions, 236 changer transitions 0/441 dead transitions. [2024-06-03 20:44:30,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 441 transitions, 8225 flow [2024-06-03 20:44:30,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:44:30,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:44:30,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 250 transitions. [2024-06-03 20:44:30,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5411255411255411 [2024-06-03 20:44:30,668 INFO L175 Difference]: Start difference. First operand has 344 places, 415 transitions, 6915 flow. Second operand 11 states and 250 transitions. [2024-06-03 20:44:30,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 441 transitions, 8225 flow [2024-06-03 20:44:33,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 441 transitions, 8046 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-03 20:44:33,237 INFO L231 Difference]: Finished difference. Result has 349 places, 415 transitions, 7214 flow [2024-06-03 20:44:33,237 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} [2024-06-03 20:44:33,237 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 306 predicate places. [2024-06-03 20:44:33,238 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 415 transitions, 7214 flow [2024-06-03 20:44:33,238 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) [2024-06-03 20:44:33,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:44:33,238 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] [2024-06-03 20:44:33,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-03 20:44:33,238 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)] === [2024-06-03 20:44:33,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:44:33,238 INFO L85 PathProgramCache]: Analyzing trace with hash -249437366, now seen corresponding path program 8 times [2024-06-03 20:44:33,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:44:33,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758323403] [2024-06-03 20:44:33,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:44:33,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:44:33,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:44:33,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:44:33,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:44:33,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758323403] [2024-06-03 20:44:33,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758323403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:44:33,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:44:33,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:44:33,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798081887] [2024-06-03 20:44:33,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:44:33,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:44:33,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:44:33,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:44:33,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:44:33,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:44:33,506 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) [2024-06-03 20:44:33,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:44:33,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:44:33,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:44:34,399 INFO L124 PetriNetUnfolderBase]: 2910/4974 cut-off events. [2024-06-03 20:44:34,399 INFO L125 PetriNetUnfolderBase]: For 590940/590940 co-relation queries the response was YES. [2024-06-03 20:44:34,450 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. [2024-06-03 20:44:34,469 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 198 selfloop transitions, 239 changer transitions 0/444 dead transitions. [2024-06-03 20:44:34,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 444 transitions, 8597 flow [2024-06-03 20:44:34,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:44:34,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:44:34,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 251 transitions. [2024-06-03 20:44:34,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5432900432900433 [2024-06-03 20:44:34,471 INFO L175 Difference]: Start difference. First operand has 349 places, 415 transitions, 7214 flow. Second operand 11 states and 251 transitions. [2024-06-03 20:44:34,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 444 transitions, 8597 flow [2024-06-03 20:44:37,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 444 transitions, 8263 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-03 20:44:37,333 INFO L231 Difference]: Finished difference. Result has 353 places, 418 transitions, 7427 flow [2024-06-03 20:44:37,333 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} [2024-06-03 20:44:37,334 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 310 predicate places. [2024-06-03 20:44:37,334 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 418 transitions, 7427 flow [2024-06-03 20:44:37,334 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) [2024-06-03 20:44:37,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:44:37,334 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] [2024-06-03 20:44:37,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-03 20:44:37,335 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)] === [2024-06-03 20:44:37,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:44:37,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1674954370, now seen corresponding path program 3 times [2024-06-03 20:44:37,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:44:37,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625143905] [2024-06-03 20:44:37,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:44:37,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:44:37,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:44:37,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:44:37,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:44:37,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625143905] [2024-06-03 20:44:37,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625143905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:44:37,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:44:37,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:44:37,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913382677] [2024-06-03 20:44:37,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:44:37,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:44:37,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:44:37,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:44:37,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:44:37,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:44:37,596 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) [2024-06-03 20:44:37,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:44:37,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:44:37,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:44:38,477 INFO L124 PetriNetUnfolderBase]: 2915/4957 cut-off events. [2024-06-03 20:44:38,477 INFO L125 PetriNetUnfolderBase]: For 606315/606315 co-relation queries the response was YES. [2024-06-03 20:44:38,530 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. [2024-06-03 20:44:38,550 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 222 selfloop transitions, 211 changer transitions 0/440 dead transitions. [2024-06-03 20:44:38,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 440 transitions, 8991 flow [2024-06-03 20:44:38,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:44:38,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:44:38,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-03 20:44:38,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5502645502645502 [2024-06-03 20:44:38,551 INFO L175 Difference]: Start difference. First operand has 353 places, 418 transitions, 7427 flow. Second operand 9 states and 208 transitions. [2024-06-03 20:44:38,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 440 transitions, 8991 flow [2024-06-03 20:44:41,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 440 transitions, 8455 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-03 20:44:41,158 INFO L231 Difference]: Finished difference. Result has 352 places, 421 transitions, 7391 flow [2024-06-03 20:44:41,158 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} [2024-06-03 20:44:41,158 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 309 predicate places. [2024-06-03 20:44:41,158 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 421 transitions, 7391 flow [2024-06-03 20:44:41,159 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) [2024-06-03 20:44:41,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:44:41,159 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] [2024-06-03 20:44:41,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-03 20:44:41,159 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)] === [2024-06-03 20:44:41,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:44:41,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1660494774, now seen corresponding path program 4 times [2024-06-03 20:44:41,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:44:41,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892151758] [2024-06-03 20:44:41,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:44:41,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:44:41,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:44:41,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:44:41,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:44:41,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892151758] [2024-06-03 20:44:41,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892151758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:44:41,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:44:41,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:44:41,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934438040] [2024-06-03 20:44:41,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:44:41,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:44:41,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:44:41,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:44:41,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:44:41,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:44:41,392 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) [2024-06-03 20:44:41,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:44:41,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:44:41,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:44:42,400 INFO L124 PetriNetUnfolderBase]: 2912/4969 cut-off events. [2024-06-03 20:44:42,401 INFO L125 PetriNetUnfolderBase]: For 612210/612210 co-relation queries the response was YES. [2024-06-03 20:44:42,456 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. [2024-06-03 20:44:42,479 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 226 selfloop transitions, 206 changer transitions 0/439 dead transitions. [2024-06-03 20:44:42,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 439 transitions, 8689 flow [2024-06-03 20:44:42,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:44:42,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:44:42,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-03 20:44:42,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.544973544973545 [2024-06-03 20:44:42,480 INFO L175 Difference]: Start difference. First operand has 352 places, 421 transitions, 7391 flow. Second operand 9 states and 206 transitions. [2024-06-03 20:44:42,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 439 transitions, 8689 flow [2024-06-03 20:44:45,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 439 transitions, 8171 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-03 20:44:45,183 INFO L231 Difference]: Finished difference. Result has 354 places, 421 transitions, 7293 flow [2024-06-03 20:44:45,183 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} [2024-06-03 20:44:45,183 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 311 predicate places. [2024-06-03 20:44:45,183 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 421 transitions, 7293 flow [2024-06-03 20:44:45,184 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) [2024-06-03 20:44:45,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:44:45,184 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] [2024-06-03 20:44:45,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-03 20:44:45,184 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)] === [2024-06-03 20:44:45,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:44:45,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1380517264, now seen corresponding path program 5 times [2024-06-03 20:44:45,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:44:45,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876240056] [2024-06-03 20:44:45,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:44:45,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:44:45,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:44:45,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:44:45,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:44:45,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876240056] [2024-06-03 20:44:45,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876240056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:44:45,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:44:45,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:44:45,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093382174] [2024-06-03 20:44:45,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:44:45,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:44:45,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:44:45,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:44:45,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:44:45,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:44:45,450 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) [2024-06-03 20:44:45,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:44:45,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:44:45,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:44:46,321 INFO L124 PetriNetUnfolderBase]: 2917/4986 cut-off events. [2024-06-03 20:44:46,322 INFO L125 PetriNetUnfolderBase]: For 623196/623196 co-relation queries the response was YES. [2024-06-03 20:44:46,375 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. [2024-06-03 20:44:46,395 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 311 selfloop transitions, 125 changer transitions 0/443 dead transitions. [2024-06-03 20:44:46,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 443 transitions, 8734 flow [2024-06-03 20:44:46,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:44:46,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:44:46,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-03 20:44:46,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5505952380952381 [2024-06-03 20:44:46,396 INFO L175 Difference]: Start difference. First operand has 354 places, 421 transitions, 7293 flow. Second operand 8 states and 185 transitions. [2024-06-03 20:44:46,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 443 transitions, 8734 flow [2024-06-03 20:44:49,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 443 transitions, 8293 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-03 20:44:49,206 INFO L231 Difference]: Finished difference. Result has 355 places, 426 transitions, 7345 flow [2024-06-03 20:44:49,207 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} [2024-06-03 20:44:49,207 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 312 predicate places. [2024-06-03 20:44:49,207 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 426 transitions, 7345 flow [2024-06-03 20:44:49,207 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) [2024-06-03 20:44:49,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:44:49,207 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] [2024-06-03 20:44:49,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-03 20:44:49,207 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)] === [2024-06-03 20:44:49,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:44:49,208 INFO L85 PathProgramCache]: Analyzing trace with hash -838497476, now seen corresponding path program 9 times [2024-06-03 20:44:49,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:44:49,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389677272] [2024-06-03 20:44:49,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:44:49,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:44:49,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:44:49,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:44:49,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:44:49,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389677272] [2024-06-03 20:44:49,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389677272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:44:49,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:44:49,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:44:49,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065046505] [2024-06-03 20:44:49,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:44:49,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:44:49,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:44:49,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:44:49,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:44:49,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:44:49,485 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) [2024-06-03 20:44:49,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:44:49,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:44:49,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:44:50,526 INFO L124 PetriNetUnfolderBase]: 2908/4979 cut-off events. [2024-06-03 20:44:50,526 INFO L125 PetriNetUnfolderBase]: For 627166/627166 co-relation queries the response was YES. [2024-06-03 20:44:50,576 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. [2024-06-03 20:44:50,594 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 375 selfloop transitions, 75 changer transitions 0/457 dead transitions. [2024-06-03 20:44:50,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 457 transitions, 8523 flow [2024-06-03 20:44:50,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:44:50,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:44:50,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-03 20:44:50,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5982142857142857 [2024-06-03 20:44:50,595 INFO L175 Difference]: Start difference. First operand has 355 places, 426 transitions, 7345 flow. Second operand 8 states and 201 transitions. [2024-06-03 20:44:50,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 457 transitions, 8523 flow [2024-06-03 20:44:53,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 457 transitions, 8318 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-03 20:44:53,424 INFO L231 Difference]: Finished difference. Result has 358 places, 426 transitions, 7305 flow [2024-06-03 20:44:53,424 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} [2024-06-03 20:44:53,425 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 315 predicate places. [2024-06-03 20:44:53,425 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 426 transitions, 7305 flow [2024-06-03 20:44:53,425 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) [2024-06-03 20:44:53,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:44:53,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:44:53,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-03 20:44:53,425 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)] === [2024-06-03 20:44:53,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:44:53,425 INFO L85 PathProgramCache]: Analyzing trace with hash -2073156896, now seen corresponding path program 6 times [2024-06-03 20:44:53,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:44:53,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767914822] [2024-06-03 20:44:53,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:44:53,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:44:53,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:44:53,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:44:53,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:44:53,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767914822] [2024-06-03 20:44:53,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767914822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:44:53,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:44:53,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:44:53,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182586397] [2024-06-03 20:44:53,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:44:53,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:44:53,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:44:53,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:44:53,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:44:53,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:44:53,701 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) [2024-06-03 20:44:53,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:44:53,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:44:53,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:44:54,520 INFO L124 PetriNetUnfolderBase]: 2913/4975 cut-off events. [2024-06-03 20:44:54,521 INFO L125 PetriNetUnfolderBase]: For 630551/630551 co-relation queries the response was YES. [2024-06-03 20:44:54,570 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. [2024-06-03 20:44:54,586 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 318 selfloop transitions, 126 changer transitions 0/451 dead transitions. [2024-06-03 20:44:54,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 451 transitions, 8722 flow [2024-06-03 20:44:54,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:44:54,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:44:54,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-03 20:44:54,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5918367346938775 [2024-06-03 20:44:54,587 INFO L175 Difference]: Start difference. First operand has 358 places, 426 transitions, 7305 flow. Second operand 7 states and 174 transitions. [2024-06-03 20:44:54,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 451 transitions, 8722 flow [2024-06-03 20:44:57,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 451 transitions, 8562 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-03 20:44:57,674 INFO L231 Difference]: Finished difference. Result has 358 places, 429 transitions, 7480 flow [2024-06-03 20:44:57,675 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} [2024-06-03 20:44:57,675 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 315 predicate places. [2024-06-03 20:44:57,675 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 429 transitions, 7480 flow [2024-06-03 20:44:57,676 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) [2024-06-03 20:44:57,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:44:57,676 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] [2024-06-03 20:44:57,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-03 20:44:57,676 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)] === [2024-06-03 20:44:57,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:44:57,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1738893352, now seen corresponding path program 10 times [2024-06-03 20:44:57,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:44:57,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448241699] [2024-06-03 20:44:57,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:44:57,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:44:57,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:44:57,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:44:57,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:44:57,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448241699] [2024-06-03 20:44:57,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448241699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:44:57,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:44:57,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:44:57,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732942835] [2024-06-03 20:44:57,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:44:57,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:44:57,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:44:57,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:44:57,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:44:57,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:44:57,958 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) [2024-06-03 20:44:57,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:44:57,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:44:57,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:44:58,875 INFO L124 PetriNetUnfolderBase]: 2904/4972 cut-off events. [2024-06-03 20:44:58,875 INFO L125 PetriNetUnfolderBase]: For 625815/625815 co-relation queries the response was YES. [2024-06-03 20:44:58,922 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. [2024-06-03 20:44:58,939 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 373 selfloop transitions, 75 changer transitions 0/455 dead transitions. [2024-06-03 20:44:58,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 455 transitions, 8442 flow [2024-06-03 20:44:58,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:44:58,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:44:58,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-03 20:44:58,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6020408163265306 [2024-06-03 20:44:58,940 INFO L175 Difference]: Start difference. First operand has 358 places, 429 transitions, 7480 flow. Second operand 7 states and 177 transitions. [2024-06-03 20:44:58,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 455 transitions, 8442 flow [2024-06-03 20:45:02,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 455 transitions, 8152 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-03 20:45:02,219 INFO L231 Difference]: Finished difference. Result has 361 places, 429 transitions, 7355 flow [2024-06-03 20:45:02,220 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} [2024-06-03 20:45:02,220 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 318 predicate places. [2024-06-03 20:45:02,220 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 429 transitions, 7355 flow [2024-06-03 20:45:02,220 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) [2024-06-03 20:45:02,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:45:02,220 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] [2024-06-03 20:45:02,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-03 20:45:02,220 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)] === [2024-06-03 20:45:02,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:45:02,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1044337016, now seen corresponding path program 7 times [2024-06-03 20:45:02,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:45:02,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810317381] [2024-06-03 20:45:02,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:45:02,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:45:02,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:45:02,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:45:02,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:45:02,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810317381] [2024-06-03 20:45:02,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810317381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:45:02,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:45:02,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:45:02,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900439678] [2024-06-03 20:45:02,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:45:02,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:45:02,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:45:02,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:45:02,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:45:02,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:45:02,470 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) [2024-06-03 20:45:02,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:45:02,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:45:02,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:45:03,296 INFO L124 PetriNetUnfolderBase]: 2901/4959 cut-off events. [2024-06-03 20:45:03,296 INFO L125 PetriNetUnfolderBase]: For 620292/620292 co-relation queries the response was YES. [2024-06-03 20:45:03,347 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. [2024-06-03 20:45:03,365 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 315 selfloop transitions, 125 changer transitions 0/447 dead transitions. [2024-06-03 20:45:03,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 447 transitions, 8483 flow [2024-06-03 20:45:03,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:45:03,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:45:03,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-03 20:45:03,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2024-06-03 20:45:03,366 INFO L175 Difference]: Start difference. First operand has 361 places, 429 transitions, 7355 flow. Second operand 7 states and 170 transitions. [2024-06-03 20:45:03,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 447 transitions, 8483 flow [2024-06-03 20:45:06,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 447 transitions, 8268 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-03 20:45:06,609 INFO L231 Difference]: Finished difference. Result has 362 places, 429 transitions, 7396 flow [2024-06-03 20:45:06,609 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} [2024-06-03 20:45:06,609 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 319 predicate places. [2024-06-03 20:45:06,609 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 429 transitions, 7396 flow [2024-06-03 20:45:06,609 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) [2024-06-03 20:45:06,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:45:06,610 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] [2024-06-03 20:45:06,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-03 20:45:06,610 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)] === [2024-06-03 20:45:06,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:45:06,610 INFO L85 PathProgramCache]: Analyzing trace with hash 377893220, now seen corresponding path program 1 times [2024-06-03 20:45:06,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:45:06,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392832114] [2024-06-03 20:45:06,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:45:06,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:45:06,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:45:06,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:45:06,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:45:06,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392832114] [2024-06-03 20:45:06,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392832114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:45:06,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:45:06,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:45:06,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461314216] [2024-06-03 20:45:06,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:45:06,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:45:06,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:45:06,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:45:06,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:45:06,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:45:06,893 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) [2024-06-03 20:45:06,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:45:06,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:45:06,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:45:07,817 INFO L124 PetriNetUnfolderBase]: 2888/4944 cut-off events. [2024-06-03 20:45:07,817 INFO L125 PetriNetUnfolderBase]: For 627550/627550 co-relation queries the response was YES. [2024-06-03 20:45:07,865 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. [2024-06-03 20:45:07,882 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 417 selfloop transitions, 24 changer transitions 1/449 dead transitions. [2024-06-03 20:45:07,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 449 transitions, 8374 flow [2024-06-03 20:45:07,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:45:07,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:45:07,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-03 20:45:07,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-03 20:45:07,883 INFO L175 Difference]: Start difference. First operand has 362 places, 429 transitions, 7396 flow. Second operand 5 states and 126 transitions. [2024-06-03 20:45:07,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 449 transitions, 8374 flow [2024-06-03 20:45:11,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 449 transitions, 7923 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-03 20:45:11,067 INFO L231 Difference]: Finished difference. Result has 357 places, 429 transitions, 6998 flow [2024-06-03 20:45:11,067 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} [2024-06-03 20:45:11,067 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 314 predicate places. [2024-06-03 20:45:11,067 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 429 transitions, 6998 flow [2024-06-03 20:45:11,068 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) [2024-06-03 20:45:11,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:45:11,068 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] [2024-06-03 20:45:11,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-03 20:45:11,068 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)] === [2024-06-03 20:45:11,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:45:11,068 INFO L85 PathProgramCache]: Analyzing trace with hash -99724504, now seen corresponding path program 1 times [2024-06-03 20:45:11,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:45:11,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969045295] [2024-06-03 20:45:11,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:45:11,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:45:11,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:45:11,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:45:11,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:45:11,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969045295] [2024-06-03 20:45:11,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969045295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:45:11,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:45:11,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:45:11,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166900399] [2024-06-03 20:45:11,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:45:11,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:45:11,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:45:11,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:45:11,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:45:11,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:45:11,401 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) [2024-06-03 20:45:11,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:45:11,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:45:11,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:45:12,317 INFO L124 PetriNetUnfolderBase]: 2935/5003 cut-off events. [2024-06-03 20:45:12,318 INFO L125 PetriNetUnfolderBase]: For 647124/647124 co-relation queries the response was YES. [2024-06-03 20:45:12,370 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. [2024-06-03 20:45:12,388 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 397 selfloop transitions, 61 changer transitions 0/465 dead transitions. [2024-06-03 20:45:12,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 465 transitions, 8372 flow [2024-06-03 20:45:12,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:45:12,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:45:12,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 205 transitions. [2024-06-03 20:45:12,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5423280423280423 [2024-06-03 20:45:12,389 INFO L175 Difference]: Start difference. First operand has 357 places, 429 transitions, 6998 flow. Second operand 9 states and 205 transitions. [2024-06-03 20:45:12,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 465 transitions, 8372 flow [2024-06-03 20:45:15,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 465 transitions, 8309 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-03 20:45:15,744 INFO L231 Difference]: Finished difference. Result has 363 places, 437 transitions, 7274 flow [2024-06-03 20:45:15,744 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} [2024-06-03 20:45:15,745 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 320 predicate places. [2024-06-03 20:45:15,745 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 437 transitions, 7274 flow [2024-06-03 20:45:15,745 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) [2024-06-03 20:45:15,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:45:15,745 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] [2024-06-03 20:45:15,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-03 20:45:15,745 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)] === [2024-06-03 20:45:15,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:45:15,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1679593830, now seen corresponding path program 2 times [2024-06-03 20:45:15,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:45:15,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062404892] [2024-06-03 20:45:15,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:45:15,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:45:15,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:45:15,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:45:15,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:45:15,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062404892] [2024-06-03 20:45:15,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062404892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:45:15,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:45:15,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:45:15,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253894614] [2024-06-03 20:45:15,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:45:15,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:45:15,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:45:15,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:45:15,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:45:16,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:45:16,014 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) [2024-06-03 20:45:16,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:45:16,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:45:16,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:45:16,985 INFO L124 PetriNetUnfolderBase]: 2930/5010 cut-off events. [2024-06-03 20:45:16,985 INFO L125 PetriNetUnfolderBase]: For 649039/649039 co-relation queries the response was YES. [2024-06-03 20:45:17,038 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. [2024-06-03 20:45:17,056 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 322 selfloop transitions, 132 changer transitions 0/461 dead transitions. [2024-06-03 20:45:17,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 461 transitions, 8240 flow [2024-06-03 20:45:17,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:45:17,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:45:17,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 224 transitions. [2024-06-03 20:45:17,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-03 20:45:17,057 INFO L175 Difference]: Start difference. First operand has 363 places, 437 transitions, 7274 flow. Second operand 10 states and 224 transitions. [2024-06-03 20:45:17,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 461 transitions, 8240 flow [2024-06-03 20:45:19,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 461 transitions, 8077 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-03 20:45:19,929 INFO L231 Difference]: Finished difference. Result has 367 places, 437 transitions, 7380 flow [2024-06-03 20:45:19,929 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} [2024-06-03 20:45:19,929 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 324 predicate places. [2024-06-03 20:45:19,929 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 437 transitions, 7380 flow [2024-06-03 20:45:19,929 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) [2024-06-03 20:45:19,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:45:19,930 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] [2024-06-03 20:45:19,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-03 20:45:19,930 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)] === [2024-06-03 20:45:19,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:45:19,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1409096950, now seen corresponding path program 3 times [2024-06-03 20:45:19,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:45:19,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067322862] [2024-06-03 20:45:19,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:45:19,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:45:19,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:45:20,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:45:20,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:45:20,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067322862] [2024-06-03 20:45:20,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067322862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:45:20,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:45:20,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:45:20,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723234490] [2024-06-03 20:45:20,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:45:20,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:45:20,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:45:20,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:45:20,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:45:20,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:45:20,239 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) [2024-06-03 20:45:20,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:45:20,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:45:20,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:45:21,151 INFO L124 PetriNetUnfolderBase]: 2938/5030 cut-off events. [2024-06-03 20:45:21,151 INFO L125 PetriNetUnfolderBase]: For 661671/661671 co-relation queries the response was YES. [2024-06-03 20:45:21,204 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. [2024-06-03 20:45:21,223 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 326 selfloop transitions, 131 changer transitions 0/464 dead transitions. [2024-06-03 20:45:21,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 464 transitions, 8397 flow [2024-06-03 20:45:21,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:45:21,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:45:21,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 242 transitions. [2024-06-03 20:45:21,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-03 20:45:21,224 INFO L175 Difference]: Start difference. First operand has 367 places, 437 transitions, 7380 flow. Second operand 11 states and 242 transitions. [2024-06-03 20:45:21,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 464 transitions, 8397 flow [2024-06-03 20:45:24,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 464 transitions, 8213 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-03 20:45:24,068 INFO L231 Difference]: Finished difference. Result has 373 places, 439 transitions, 7510 flow [2024-06-03 20:45:24,068 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} [2024-06-03 20:45:24,068 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 330 predicate places. [2024-06-03 20:45:24,068 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 439 transitions, 7510 flow [2024-06-03 20:45:24,068 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) [2024-06-03 20:45:24,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:45:24,068 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] [2024-06-03 20:45:24,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-03 20:45:24,069 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)] === [2024-06-03 20:45:24,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:45:24,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1633958764, now seen corresponding path program 4 times [2024-06-03 20:45:24,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:45:24,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084821335] [2024-06-03 20:45:24,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:45:24,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:45:24,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:45:24,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:45:24,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:45:24,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084821335] [2024-06-03 20:45:24,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084821335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:45:24,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:45:24,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:45:24,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252245295] [2024-06-03 20:45:24,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:45:24,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:45:24,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:45:24,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:45:24,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:45:24,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:45:24,386 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) [2024-06-03 20:45:24,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:45:24,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:45:24,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:45:25,386 INFO L124 PetriNetUnfolderBase]: 2986/5104 cut-off events. [2024-06-03 20:45:25,386 INFO L125 PetriNetUnfolderBase]: For 720884/720884 co-relation queries the response was YES. [2024-06-03 20:45:25,441 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. [2024-06-03 20:45:25,459 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 413 selfloop transitions, 55 changer transitions 0/475 dead transitions. [2024-06-03 20:45:25,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 475 transitions, 8632 flow [2024-06-03 20:45:25,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:45:25,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:45:25,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-03 20:45:25,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6156462585034014 [2024-06-03 20:45:25,460 INFO L175 Difference]: Start difference. First operand has 373 places, 439 transitions, 7510 flow. Second operand 7 states and 181 transitions. [2024-06-03 20:45:25,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 475 transitions, 8632 flow [2024-06-03 20:45:29,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 475 transitions, 8356 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-03 20:45:29,274 INFO L231 Difference]: Finished difference. Result has 372 places, 443 transitions, 7447 flow [2024-06-03 20:45:29,274 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} [2024-06-03 20:45:29,274 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 329 predicate places. [2024-06-03 20:45:29,274 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 443 transitions, 7447 flow [2024-06-03 20:45:29,274 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) [2024-06-03 20:45:29,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:45:29,274 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] [2024-06-03 20:45:29,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-03 20:45:29,275 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)] === [2024-06-03 20:45:29,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:45:29,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1902830616, now seen corresponding path program 11 times [2024-06-03 20:45:29,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:45:29,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641460768] [2024-06-03 20:45:29,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:45:29,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:45:29,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:45:29,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:45:29,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:45:29,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641460768] [2024-06-03 20:45:29,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641460768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:45:29,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:45:29,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:45:29,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159572445] [2024-06-03 20:45:29,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:45:29,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:45:29,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:45:29,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:45:29,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:45:29,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:45:29,526 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) [2024-06-03 20:45:29,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:45:29,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:45:29,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:45:30,464 INFO L124 PetriNetUnfolderBase]: 2991/5112 cut-off events. [2024-06-03 20:45:30,464 INFO L125 PetriNetUnfolderBase]: For 669379/669383 co-relation queries the response was YES. [2024-06-03 20:45:30,518 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. [2024-06-03 20:45:30,537 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 245 selfloop transitions, 220 changer transitions 0/472 dead transitions. [2024-06-03 20:45:30,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 472 transitions, 8946 flow [2024-06-03 20:45:30,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:45:30,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:45:30,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 246 transitions. [2024-06-03 20:45:30,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5324675324675324 [2024-06-03 20:45:30,538 INFO L175 Difference]: Start difference. First operand has 372 places, 443 transitions, 7447 flow. Second operand 11 states and 246 transitions. [2024-06-03 20:45:30,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 472 transitions, 8946 flow [2024-06-03 20:45:33,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 472 transitions, 8809 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-03 20:45:33,491 INFO L231 Difference]: Finished difference. Result has 378 places, 446 transitions, 7831 flow [2024-06-03 20:45:33,491 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} [2024-06-03 20:45:33,491 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-03 20:45:33,491 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 446 transitions, 7831 flow [2024-06-03 20:45:33,491 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) [2024-06-03 20:45:33,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:45:33,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:45:33,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-03 20:45:33,492 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)] === [2024-06-03 20:45:33,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:45:33,492 INFO L85 PathProgramCache]: Analyzing trace with hash 977088872, now seen corresponding path program 12 times [2024-06-03 20:45:33,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:45:33,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064736191] [2024-06-03 20:45:33,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:45:33,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:45:33,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:45:33,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:45:33,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:45:33,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064736191] [2024-06-03 20:45:33,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064736191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:45:33,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:45:33,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:45:33,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535235396] [2024-06-03 20:45:33,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:45:33,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:45:33,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:45:33,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:45:33,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:45:33,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:45:33,742 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) [2024-06-03 20:45:33,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:45:33,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:45:33,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:45:34,667 INFO L124 PetriNetUnfolderBase]: 2988/5104 cut-off events. [2024-06-03 20:45:34,667 INFO L125 PetriNetUnfolderBase]: For 678415/678419 co-relation queries the response was YES. [2024-06-03 20:45:34,718 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. [2024-06-03 20:45:34,735 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 245 selfloop transitions, 216 changer transitions 0/468 dead transitions. [2024-06-03 20:45:34,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 468 transitions, 9241 flow [2024-06-03 20:45:34,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:45:34,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:45:34,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 227 transitions. [2024-06-03 20:45:34,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5404761904761904 [2024-06-03 20:45:34,736 INFO L175 Difference]: Start difference. First operand has 378 places, 446 transitions, 7831 flow. Second operand 10 states and 227 transitions. [2024-06-03 20:45:34,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 468 transitions, 9241 flow [2024-06-03 20:45:38,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 468 transitions, 8893 flow, removed 73 selfloop flow, removed 5 redundant places. [2024-06-03 20:45:38,160 INFO L231 Difference]: Finished difference. Result has 383 places, 446 transitions, 7921 flow [2024-06-03 20:45:38,160 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} [2024-06-03 20:45:38,160 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 340 predicate places. [2024-06-03 20:45:38,160 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 446 transitions, 7921 flow [2024-06-03 20:45:38,160 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) [2024-06-03 20:45:38,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:45:38,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:45:38,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-03 20:45:38,161 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)] === [2024-06-03 20:45:38,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:45:38,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1593148366, now seen corresponding path program 13 times [2024-06-03 20:45:38,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:45:38,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315236206] [2024-06-03 20:45:38,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:45:38,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:45:38,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:45:38,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:45:38,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:45:38,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315236206] [2024-06-03 20:45:38,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315236206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:45:38,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:45:38,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:45:38,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661942807] [2024-06-03 20:45:38,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:45:38,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:45:38,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:45:38,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:45:38,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:45:38,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:45:38,438 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) [2024-06-03 20:45:38,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:45:38,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:45:38,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:45:39,358 INFO L124 PetriNetUnfolderBase]: 3001/5100 cut-off events. [2024-06-03 20:45:39,358 INFO L125 PetriNetUnfolderBase]: For 698494/698494 co-relation queries the response was YES. [2024-06-03 20:45:39,411 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. [2024-06-03 20:45:39,428 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 370 selfloop transitions, 102 changer transitions 0/479 dead transitions. [2024-06-03 20:45:39,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 479 transitions, 9248 flow [2024-06-03 20:45:39,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:45:39,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:45:39,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 263 transitions. [2024-06-03 20:45:39,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5218253968253969 [2024-06-03 20:45:39,429 INFO L175 Difference]: Start difference. First operand has 383 places, 446 transitions, 7921 flow. Second operand 12 states and 263 transitions. [2024-06-03 20:45:39,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 479 transitions, 9248 flow [2024-06-03 20:45:42,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 479 transitions, 8813 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-03 20:45:42,638 INFO L231 Difference]: Finished difference. Result has 389 places, 450 transitions, 7807 flow [2024-06-03 20:45:42,639 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} [2024-06-03 20:45:42,639 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 346 predicate places. [2024-06-03 20:45:42,639 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 450 transitions, 7807 flow [2024-06-03 20:45:42,639 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) [2024-06-03 20:45:42,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:45:42,640 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] [2024-06-03 20:45:42,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-03 20:45:42,640 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)] === [2024-06-03 20:45:42,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:45:42,640 INFO L85 PathProgramCache]: Analyzing trace with hash 509100622, now seen corresponding path program 14 times [2024-06-03 20:45:42,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:45:42,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448646244] [2024-06-03 20:45:42,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:45:42,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:45:42,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:45:42,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:45:42,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:45:42,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448646244] [2024-06-03 20:45:42,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448646244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:45:42,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:45:42,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:45:42,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108395797] [2024-06-03 20:45:42,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:45:42,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:45:42,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:45:42,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:45:42,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:45:42,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:45:42,995 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) [2024-06-03 20:45:42,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:45:42,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:45:42,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:45:43,934 INFO L124 PetriNetUnfolderBase]: 3006/5114 cut-off events. [2024-06-03 20:45:43,934 INFO L125 PetriNetUnfolderBase]: For 707583/707583 co-relation queries the response was YES. [2024-06-03 20:45:43,990 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. [2024-06-03 20:45:44,009 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 242 selfloop transitions, 230 changer transitions 0/479 dead transitions. [2024-06-03 20:45:44,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 479 transitions, 9120 flow [2024-06-03 20:45:44,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:45:44,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:45:44,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 263 transitions. [2024-06-03 20:45:44,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5218253968253969 [2024-06-03 20:45:44,010 INFO L175 Difference]: Start difference. First operand has 389 places, 450 transitions, 7807 flow. Second operand 12 states and 263 transitions. [2024-06-03 20:45:44,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 479 transitions, 9120 flow [2024-06-03 20:45:47,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 479 transitions, 8807 flow, removed 45 selfloop flow, removed 11 redundant places. [2024-06-03 20:45:47,130 INFO L231 Difference]: Finished difference. Result has 390 places, 453 transitions, 8047 flow [2024-06-03 20:45:47,130 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} [2024-06-03 20:45:47,131 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 347 predicate places. [2024-06-03 20:45:47,131 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 453 transitions, 8047 flow [2024-06-03 20:45:47,131 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) [2024-06-03 20:45:47,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:45:47,131 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] [2024-06-03 20:45:47,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-03 20:45:47,131 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)] === [2024-06-03 20:45:47,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:45:47,131 INFO L85 PathProgramCache]: Analyzing trace with hash -438438766, now seen corresponding path program 15 times [2024-06-03 20:45:47,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:45:47,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114352960] [2024-06-03 20:45:47,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:45:47,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:45:47,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:45:47,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:45:47,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:45:47,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114352960] [2024-06-03 20:45:47,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114352960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:45:47,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:45:47,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:45:47,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367319447] [2024-06-03 20:45:47,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:45:47,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:45:47,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:45:47,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:45:47,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:45:47,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:45:47,399 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) [2024-06-03 20:45:47,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:45:47,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:45:47,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:45:48,330 INFO L124 PetriNetUnfolderBase]: 3003/5106 cut-off events. [2024-06-03 20:45:48,330 INFO L125 PetriNetUnfolderBase]: For 715166/715166 co-relation queries the response was YES. [2024-06-03 20:45:48,386 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. [2024-06-03 20:45:48,405 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 239 selfloop transitions, 230 changer transitions 0/476 dead transitions. [2024-06-03 20:45:48,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 476 transitions, 9487 flow [2024-06-03 20:45:48,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:45:48,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:45:48,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 246 transitions. [2024-06-03 20:45:48,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5324675324675324 [2024-06-03 20:45:48,406 INFO L175 Difference]: Start difference. First operand has 390 places, 453 transitions, 8047 flow. Second operand 11 states and 246 transitions. [2024-06-03 20:45:48,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 476 transitions, 9487 flow [2024-06-03 20:45:52,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 476 transitions, 8995 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-06-03 20:45:52,112 INFO L231 Difference]: Finished difference. Result has 391 places, 453 transitions, 8021 flow [2024-06-03 20:45:52,112 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} [2024-06-03 20:45:52,112 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 348 predicate places. [2024-06-03 20:45:52,112 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 453 transitions, 8021 flow [2024-06-03 20:45:52,112 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) [2024-06-03 20:45:52,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:45:52,112 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] [2024-06-03 20:45:52,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-03 20:45:52,113 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)] === [2024-06-03 20:45:52,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:45:52,113 INFO L85 PathProgramCache]: Analyzing trace with hash -438646156, now seen corresponding path program 16 times [2024-06-03 20:45:52,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:45:52,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097386955] [2024-06-03 20:45:52,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:45:52,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:45:52,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:45:52,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:45:52,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:45:52,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097386955] [2024-06-03 20:45:52,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097386955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:45:52,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:45:52,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:45:52,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874723413] [2024-06-03 20:45:52,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:45:52,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:45:52,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:45:52,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:45:52,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:45:52,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:45:52,376 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) [2024-06-03 20:45:52,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:45:52,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:45:52,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:45:53,301 INFO L124 PetriNetUnfolderBase]: 3000/5110 cut-off events. [2024-06-03 20:45:53,301 INFO L125 PetriNetUnfolderBase]: For 720761/720761 co-relation queries the response was YES. [2024-06-03 20:45:53,357 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. [2024-06-03 20:45:53,377 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 241 selfloop transitions, 227 changer transitions 0/475 dead transitions. [2024-06-03 20:45:53,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 475 transitions, 9235 flow [2024-06-03 20:45:53,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:45:53,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:45:53,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 244 transitions. [2024-06-03 20:45:53,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5281385281385281 [2024-06-03 20:45:53,378 INFO L175 Difference]: Start difference. First operand has 391 places, 453 transitions, 8021 flow. Second operand 11 states and 244 transitions. [2024-06-03 20:45:53,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 475 transitions, 9235 flow [2024-06-03 20:45:56,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 475 transitions, 8901 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-03 20:45:56,822 INFO L231 Difference]: Finished difference. Result has 395 places, 453 transitions, 8147 flow [2024-06-03 20:45:56,822 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} [2024-06-03 20:45:56,822 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 352 predicate places. [2024-06-03 20:45:56,822 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 453 transitions, 8147 flow [2024-06-03 20:45:56,822 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) [2024-06-03 20:45:56,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:45:56,822 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] [2024-06-03 20:45:56,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-03 20:45:56,823 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)] === [2024-06-03 20:45:56,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:45:56,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1428801896, now seen corresponding path program 17 times [2024-06-03 20:45:56,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:45:56,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812230192] [2024-06-03 20:45:56,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:45:56,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:45:56,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:45:57,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:45:57,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:45:57,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812230192] [2024-06-03 20:45:57,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812230192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:45:57,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:45:57,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:45:57,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557391520] [2024-06-03 20:45:57,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:45:57,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:45:57,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:45:57,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:45:57,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:45:57,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:45:57,053 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) [2024-06-03 20:45:57,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:45:57,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:45:57,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:45:57,997 INFO L124 PetriNetUnfolderBase]: 3026/5175 cut-off events. [2024-06-03 20:45:57,998 INFO L125 PetriNetUnfolderBase]: For 755339/755343 co-relation queries the response was YES. [2024-06-03 20:45:58,056 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. [2024-06-03 20:45:58,076 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 390 selfloop transitions, 81 changer transitions 0/478 dead transitions. [2024-06-03 20:45:58,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 478 transitions, 9541 flow [2024-06-03 20:45:58,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:45:58,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:45:58,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-03 20:45:58,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544217687074829 [2024-06-03 20:45:58,077 INFO L175 Difference]: Start difference. First operand has 395 places, 453 transitions, 8147 flow. Second operand 7 states and 163 transitions. [2024-06-03 20:45:58,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 478 transitions, 9541 flow [2024-06-03 20:46:02,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 478 transitions, 8910 flow, removed 1 selfloop flow, removed 11 redundant places. [2024-06-03 20:46:02,191 INFO L231 Difference]: Finished difference. Result has 392 places, 463 transitions, 7932 flow [2024-06-03 20:46:02,191 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} [2024-06-03 20:46:02,191 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 349 predicate places. [2024-06-03 20:46:02,191 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 463 transitions, 7932 flow [2024-06-03 20:46:02,191 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) [2024-06-03 20:46:02,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:02,192 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] [2024-06-03 20:46:02,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-03 20:46:02,192 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)] === [2024-06-03 20:46:02,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:02,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1193026822, now seen corresponding path program 18 times [2024-06-03 20:46:02,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:02,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311598023] [2024-06-03 20:46:02,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:02,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:02,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:02,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:02,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:02,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311598023] [2024-06-03 20:46:02,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311598023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:02,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:02,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:46:02,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141625970] [2024-06-03 20:46:02,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:02,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:46:02,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:02,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:46:02,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:46:02,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:46:02,441 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) [2024-06-03 20:46:02,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:02,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:46:02,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:03,426 INFO L124 PetriNetUnfolderBase]: 3020/5158 cut-off events. [2024-06-03 20:46:03,427 INFO L125 PetriNetUnfolderBase]: For 748191/748191 co-relation queries the response was YES. [2024-06-03 20:46:03,484 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. [2024-06-03 20:46:03,502 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 342 selfloop transitions, 134 changer transitions 0/483 dead transitions. [2024-06-03 20:46:03,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 483 transitions, 9620 flow [2024-06-03 20:46:03,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:46:03,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:46:03,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 227 transitions. [2024-06-03 20:46:03,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5404761904761904 [2024-06-03 20:46:03,503 INFO L175 Difference]: Start difference. First operand has 392 places, 463 transitions, 7932 flow. Second operand 10 states and 227 transitions. [2024-06-03 20:46:03,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 483 transitions, 9620 flow [2024-06-03 20:46:07,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 483 transitions, 9454 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-03 20:46:07,026 INFO L231 Difference]: Finished difference. Result has 398 places, 463 transitions, 8041 flow [2024-06-03 20:46:07,026 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} [2024-06-03 20:46:07,026 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 355 predicate places. [2024-06-03 20:46:07,026 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 463 transitions, 8041 flow [2024-06-03 20:46:07,026 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) [2024-06-03 20:46:07,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:07,027 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] [2024-06-03 20:46:07,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-03 20:46:07,027 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)] === [2024-06-03 20:46:07,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:07,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1770133414, now seen corresponding path program 19 times [2024-06-03 20:46:07,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:07,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311583826] [2024-06-03 20:46:07,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:07,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:07,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:07,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:07,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:07,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311583826] [2024-06-03 20:46:07,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311583826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:07,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:07,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:46:07,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817006944] [2024-06-03 20:46:07,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:07,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:46:07,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:07,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:46:07,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:46:07,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:46:07,272 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) [2024-06-03 20:46:07,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:07,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:46:07,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:08,377 INFO L124 PetriNetUnfolderBase]: 3014/5150 cut-off events. [2024-06-03 20:46:08,378 INFO L125 PetriNetUnfolderBase]: For 747422/747422 co-relation queries the response was YES. [2024-06-03 20:46:08,429 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. [2024-06-03 20:46:08,446 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 248 selfloop transitions, 227 changer transitions 0/482 dead transitions. [2024-06-03 20:46:08,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 482 transitions, 9499 flow [2024-06-03 20:46:08,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:46:08,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:46:08,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 228 transitions. [2024-06-03 20:46:08,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-06-03 20:46:08,448 INFO L175 Difference]: Start difference. First operand has 398 places, 463 transitions, 8041 flow. Second operand 10 states and 228 transitions. [2024-06-03 20:46:08,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 482 transitions, 9499 flow [2024-06-03 20:46:11,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 482 transitions, 8945 flow, removed 67 selfloop flow, removed 9 redundant places. [2024-06-03 20:46:11,721 INFO L231 Difference]: Finished difference. Result has 399 places, 463 transitions, 7948 flow [2024-06-03 20:46:11,722 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} [2024-06-03 20:46:11,722 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 356 predicate places. [2024-06-03 20:46:11,722 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 463 transitions, 7948 flow [2024-06-03 20:46:11,722 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) [2024-06-03 20:46:11,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:11,722 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] [2024-06-03 20:46:11,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-03 20:46:11,723 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)] === [2024-06-03 20:46:11,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:11,723 INFO L85 PathProgramCache]: Analyzing trace with hash 284000846, now seen corresponding path program 20 times [2024-06-03 20:46:11,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:11,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469304248] [2024-06-03 20:46:11,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:11,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:11,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:11,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:11,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:11,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469304248] [2024-06-03 20:46:11,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469304248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:11,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:11,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:46:11,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199866413] [2024-06-03 20:46:11,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:11,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:46:11,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:11,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:46:11,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:46:11,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:46:11,964 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) [2024-06-03 20:46:11,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:11,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:46:11,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:12,930 INFO L124 PetriNetUnfolderBase]: 3008/5126 cut-off events. [2024-06-03 20:46:12,931 INFO L125 PetriNetUnfolderBase]: For 747914/747914 co-relation queries the response was YES. [2024-06-03 20:46:12,990 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. [2024-06-03 20:46:13,010 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 247 selfloop transitions, 227 changer transitions 0/481 dead transitions. [2024-06-03 20:46:13,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 481 transitions, 9172 flow [2024-06-03 20:46:13,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:46:13,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:46:13,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-03 20:46:13,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-03 20:46:13,011 INFO L175 Difference]: Start difference. First operand has 399 places, 463 transitions, 7948 flow. Second operand 10 states and 225 transitions. [2024-06-03 20:46:13,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 481 transitions, 9172 flow [2024-06-03 20:46:16,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 481 transitions, 8800 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-03 20:46:16,626 INFO L231 Difference]: Finished difference. Result has 402 places, 463 transitions, 8037 flow [2024-06-03 20:46:16,626 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} [2024-06-03 20:46:16,626 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 359 predicate places. [2024-06-03 20:46:16,626 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 463 transitions, 8037 flow [2024-06-03 20:46:16,626 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) [2024-06-03 20:46:16,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:16,626 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] [2024-06-03 20:46:16,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-03 20:46:16,627 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)] === [2024-06-03 20:46:16,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:16,627 INFO L85 PathProgramCache]: Analyzing trace with hash 119714200, now seen corresponding path program 21 times [2024-06-03 20:46:16,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:16,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147222484] [2024-06-03 20:46:16,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:16,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:16,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:16,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:16,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:16,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147222484] [2024-06-03 20:46:16,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147222484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:16,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:16,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:46:16,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697002335] [2024-06-03 20:46:16,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:16,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:46:16,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:16,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:46:16,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:46:16,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:46:16,875 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) [2024-06-03 20:46:16,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:16,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:46:16,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:17,873 INFO L124 PetriNetUnfolderBase]: 3018/5185 cut-off events. [2024-06-03 20:46:17,873 INFO L125 PetriNetUnfolderBase]: For 758466/758466 co-relation queries the response was YES. [2024-06-03 20:46:17,927 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. [2024-06-03 20:46:17,945 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 346 selfloop transitions, 147 changer transitions 0/500 dead transitions. [2024-06-03 20:46:17,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 500 transitions, 9905 flow [2024-06-03 20:46:17,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:46:17,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:46:17,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-03 20:46:17,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6160714285714286 [2024-06-03 20:46:17,946 INFO L175 Difference]: Start difference. First operand has 402 places, 463 transitions, 8037 flow. Second operand 8 states and 207 transitions. [2024-06-03 20:46:17,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 500 transitions, 9905 flow [2024-06-03 20:46:22,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 500 transitions, 9427 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-03 20:46:22,360 INFO L231 Difference]: Finished difference. Result has 400 places, 467 transitions, 7969 flow [2024-06-03 20:46:22,361 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} [2024-06-03 20:46:22,361 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 357 predicate places. [2024-06-03 20:46:22,361 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 467 transitions, 7969 flow [2024-06-03 20:46:22,361 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) [2024-06-03 20:46:22,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:22,361 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] [2024-06-03 20:46:22,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-03 20:46:22,362 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)] === [2024-06-03 20:46:22,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:22,362 INFO L85 PathProgramCache]: Analyzing trace with hash 132373546, now seen corresponding path program 22 times [2024-06-03 20:46:22,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:22,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917604692] [2024-06-03 20:46:22,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:22,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:22,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:22,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:22,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:22,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917604692] [2024-06-03 20:46:22,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917604692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:22,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:22,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:46:22,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564268205] [2024-06-03 20:46:22,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:22,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:46:22,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:22,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:46:22,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:46:22,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:46:22,617 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) [2024-06-03 20:46:22,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:22,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:46:22,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:23,538 INFO L124 PetriNetUnfolderBase]: 3012/5160 cut-off events. [2024-06-03 20:46:23,538 INFO L125 PetriNetUnfolderBase]: For 755982/755982 co-relation queries the response was YES. [2024-06-03 20:46:23,595 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. [2024-06-03 20:46:23,614 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 357 selfloop transitions, 127 changer transitions 0/491 dead transitions. [2024-06-03 20:46:23,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 491 transitions, 9235 flow [2024-06-03 20:46:23,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:46:23,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:46:23,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-03 20:46:23,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6054421768707483 [2024-06-03 20:46:23,615 INFO L175 Difference]: Start difference. First operand has 400 places, 467 transitions, 7969 flow. Second operand 7 states and 178 transitions. [2024-06-03 20:46:23,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 491 transitions, 9235 flow [2024-06-03 20:46:28,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 491 transitions, 8892 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-03 20:46:28,095 INFO L231 Difference]: Finished difference. Result has 400 places, 467 transitions, 7895 flow [2024-06-03 20:46:28,095 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} [2024-06-03 20:46:28,096 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 357 predicate places. [2024-06-03 20:46:28,096 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 467 transitions, 7895 flow [2024-06-03 20:46:28,096 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) [2024-06-03 20:46:28,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:28,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:28,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-03 20:46:28,096 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)] === [2024-06-03 20:46:28,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:28,097 INFO L85 PathProgramCache]: Analyzing trace with hash 100625068, now seen corresponding path program 23 times [2024-06-03 20:46:28,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:28,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880563233] [2024-06-03 20:46:28,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:28,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:28,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:28,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:28,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:28,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880563233] [2024-06-03 20:46:28,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880563233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:28,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:28,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:46:28,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665506794] [2024-06-03 20:46:28,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:28,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:46:28,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:28,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:46:28,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:46:28,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:46:28,347 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) [2024-06-03 20:46:28,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:28,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:46:28,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:29,332 INFO L124 PetriNetUnfolderBase]: 3006/5152 cut-off events. [2024-06-03 20:46:29,333 INFO L125 PetriNetUnfolderBase]: For 729087/729087 co-relation queries the response was YES. [2024-06-03 20:46:29,390 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. [2024-06-03 20:46:29,409 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 360 selfloop transitions, 128 changer transitions 0/495 dead transitions. [2024-06-03 20:46:29,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 495 transitions, 9177 flow [2024-06-03 20:46:29,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:46:29,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:46:29,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-03 20:46:29,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5982142857142857 [2024-06-03 20:46:29,410 INFO L175 Difference]: Start difference. First operand has 400 places, 467 transitions, 7895 flow. Second operand 8 states and 201 transitions. [2024-06-03 20:46:29,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 495 transitions, 9177 flow [2024-06-03 20:46:33,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 495 transitions, 8844 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-03 20:46:33,703 INFO L231 Difference]: Finished difference. Result has 401 places, 467 transitions, 7831 flow [2024-06-03 20:46:33,704 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} [2024-06-03 20:46:33,704 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 358 predicate places. [2024-06-03 20:46:33,704 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 467 transitions, 7831 flow [2024-06-03 20:46:33,704 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) [2024-06-03 20:46:33,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:33,704 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] [2024-06-03 20:46:33,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-03 20:46:33,704 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)] === [2024-06-03 20:46:33,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:33,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1476785092, now seen corresponding path program 5 times [2024-06-03 20:46:33,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:33,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271049990] [2024-06-03 20:46:33,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:33,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:33,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:33,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:33,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:33,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271049990] [2024-06-03 20:46:33,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271049990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:33,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:33,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:46:33,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087101946] [2024-06-03 20:46:33,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:33,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:46:33,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:33,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:46:33,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:46:34,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:46:34,001 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) [2024-06-03 20:46:34,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:34,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:46:34,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:34,956 INFO L124 PetriNetUnfolderBase]: 3001/5152 cut-off events. [2024-06-03 20:46:34,957 INFO L125 PetriNetUnfolderBase]: For 713706/713706 co-relation queries the response was YES. [2024-06-03 20:46:35,016 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. [2024-06-03 20:46:35,036 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 365 selfloop transitions, 117 changer transitions 0/489 dead transitions. [2024-06-03 20:46:35,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 489 transitions, 8847 flow [2024-06-03 20:46:35,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:46:35,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:46:35,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-03 20:46:35,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5108225108225108 [2024-06-03 20:46:35,037 INFO L175 Difference]: Start difference. First operand has 401 places, 467 transitions, 7831 flow. Second operand 11 states and 236 transitions. [2024-06-03 20:46:35,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 489 transitions, 8847 flow [2024-06-03 20:46:38,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 489 transitions, 8427 flow, removed 27 selfloop flow, removed 9 redundant places. [2024-06-03 20:46:38,903 INFO L231 Difference]: Finished difference. Result has 403 places, 467 transitions, 7650 flow [2024-06-03 20:46:38,903 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} [2024-06-03 20:46:38,903 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 360 predicate places. [2024-06-03 20:46:38,903 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 467 transitions, 7650 flow [2024-06-03 20:46:38,904 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) [2024-06-03 20:46:38,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:38,904 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] [2024-06-03 20:46:38,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-03 20:46:38,904 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)] === [2024-06-03 20:46:38,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:38,904 INFO L85 PathProgramCache]: Analyzing trace with hash 209888090, now seen corresponding path program 6 times [2024-06-03 20:46:38,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:38,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093315513] [2024-06-03 20:46:38,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:38,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:38,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:39,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:39,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:39,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093315513] [2024-06-03 20:46:39,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093315513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:39,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:39,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:46:39,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552296732] [2024-06-03 20:46:39,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:39,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:46:39,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:39,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:46:39,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:46:39,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:46:39,192 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) [2024-06-03 20:46:39,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:39,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:46:39,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:40,158 INFO L124 PetriNetUnfolderBase]: 3068/5250 cut-off events. [2024-06-03 20:46:40,158 INFO L125 PetriNetUnfolderBase]: For 784724/784728 co-relation queries the response was YES. [2024-06-03 20:46:40,216 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. [2024-06-03 20:46:40,236 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 447 selfloop transitions, 45 changer transitions 0/499 dead transitions. [2024-06-03 20:46:40,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 499 transitions, 9048 flow [2024-06-03 20:46:40,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:46:40,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:46:40,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 205 transitions. [2024-06-03 20:46:40,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5423280423280423 [2024-06-03 20:46:40,237 INFO L175 Difference]: Start difference. First operand has 403 places, 467 transitions, 7650 flow. Second operand 9 states and 205 transitions. [2024-06-03 20:46:40,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 499 transitions, 9048 flow [2024-06-03 20:46:44,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 499 transitions, 8811 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-03 20:46:44,436 INFO L231 Difference]: Finished difference. Result has 404 places, 471 transitions, 7618 flow [2024-06-03 20:46:44,436 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} [2024-06-03 20:46:44,436 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 361 predicate places. [2024-06-03 20:46:44,436 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 471 transitions, 7618 flow [2024-06-03 20:46:44,436 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) [2024-06-03 20:46:44,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:44,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:44,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-03 20:46:44,437 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)] === [2024-06-03 20:46:44,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:44,437 INFO L85 PathProgramCache]: Analyzing trace with hash -409968630, now seen corresponding path program 7 times [2024-06-03 20:46:44,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:44,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616593915] [2024-06-03 20:46:44,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:44,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:44,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:44,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:44,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:44,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616593915] [2024-06-03 20:46:44,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616593915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:44,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:44,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:46:44,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845819807] [2024-06-03 20:46:44,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:44,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:46:44,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:44,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:46:44,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:46:44,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:46:44,711 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) [2024-06-03 20:46:44,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:44,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:46:44,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:45,671 INFO L124 PetriNetUnfolderBase]: 3076/5272 cut-off events. [2024-06-03 20:46:45,672 INFO L125 PetriNetUnfolderBase]: For 797502/797506 co-relation queries the response was YES. [2024-06-03 20:46:45,732 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. [2024-06-03 20:46:45,751 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 373 selfloop transitions, 114 changer transitions 0/494 dead transitions. [2024-06-03 20:46:45,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 494 transitions, 8697 flow [2024-06-03 20:46:45,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:46:45,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:46:45,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-03 20:46:45,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5190476190476191 [2024-06-03 20:46:45,752 INFO L175 Difference]: Start difference. First operand has 404 places, 471 transitions, 7618 flow. Second operand 10 states and 218 transitions. [2024-06-03 20:46:45,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 494 transitions, 8697 flow [2024-06-03 20:46:49,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 494 transitions, 8570 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-03 20:46:49,560 INFO L231 Difference]: Finished difference. Result has 408 places, 473 transitions, 7783 flow [2024-06-03 20:46:49,561 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} [2024-06-03 20:46:49,561 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 365 predicate places. [2024-06-03 20:46:49,561 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 473 transitions, 7783 flow [2024-06-03 20:46:49,561 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) [2024-06-03 20:46:49,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:49,561 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] [2024-06-03 20:46:49,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-03 20:46:49,561 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)] === [2024-06-03 20:46:49,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:49,562 INFO L85 PathProgramCache]: Analyzing trace with hash -2116787060, now seen corresponding path program 8 times [2024-06-03 20:46:49,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:49,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443193772] [2024-06-03 20:46:49,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:49,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:49,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:49,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:49,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:49,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443193772] [2024-06-03 20:46:49,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443193772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:49,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:49,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:46:49,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250245293] [2024-06-03 20:46:49,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:49,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:46:49,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:49,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:46:49,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:46:49,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:46:49,821 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) [2024-06-03 20:46:49,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:49,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:46:49,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:50,830 INFO L124 PetriNetUnfolderBase]: 3202/5502 cut-off events. [2024-06-03 20:46:50,830 INFO L125 PetriNetUnfolderBase]: For 954838/954842 co-relation queries the response was YES. [2024-06-03 20:46:50,893 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. [2024-06-03 20:46:50,914 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 357 selfloop transitions, 148 changer transitions 0/512 dead transitions. [2024-06-03 20:46:50,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 512 transitions, 9542 flow [2024-06-03 20:46:50,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:46:50,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:46:50,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-03 20:46:50,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-03 20:46:50,915 INFO L175 Difference]: Start difference. First operand has 408 places, 473 transitions, 7783 flow. Second operand 9 states and 213 transitions. [2024-06-03 20:46:50,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 512 transitions, 9542 flow [2024-06-03 20:46:55,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 512 transitions, 9283 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-03 20:46:55,799 INFO L231 Difference]: Finished difference. Result has 410 places, 479 transitions, 8010 flow [2024-06-03 20:46:55,799 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} [2024-06-03 20:46:55,800 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 367 predicate places. [2024-06-03 20:46:55,800 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 479 transitions, 8010 flow [2024-06-03 20:46:55,800 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) [2024-06-03 20:46:55,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:55,800 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] [2024-06-03 20:46:55,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-03 20:46:55,801 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)] === [2024-06-03 20:46:55,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:55,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1548480616, now seen corresponding path program 9 times [2024-06-03 20:46:55,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:55,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940090500] [2024-06-03 20:46:55,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:55,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:55,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:56,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:56,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:56,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940090500] [2024-06-03 20:46:56,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940090500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:56,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:56,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:46:56,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885934493] [2024-06-03 20:46:56,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:56,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:46:56,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:56,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:46:56,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:46:56,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:46:56,084 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) [2024-06-03 20:46:56,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:56,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:46:56,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:57,165 INFO L124 PetriNetUnfolderBase]: 3177/5455 cut-off events. [2024-06-03 20:46:57,165 INFO L125 PetriNetUnfolderBase]: For 960280/960284 co-relation queries the response was YES. [2024-06-03 20:46:57,225 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. [2024-06-03 20:46:57,246 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 366 selfloop transitions, 136 changer transitions 0/509 dead transitions. [2024-06-03 20:46:57,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 509 transitions, 9362 flow [2024-06-03 20:46:57,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:46:57,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:46:57,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-03 20:46:57,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-03 20:46:57,247 INFO L175 Difference]: Start difference. First operand has 410 places, 479 transitions, 8010 flow. Second operand 9 states and 210 transitions. [2024-06-03 20:46:57,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 509 transitions, 9362 flow [2024-06-03 20:47:01,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 509 transitions, 9106 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-03 20:47:01,903 INFO L231 Difference]: Finished difference. Result has 414 places, 479 transitions, 8032 flow [2024-06-03 20:47:01,903 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} [2024-06-03 20:47:01,903 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 371 predicate places. [2024-06-03 20:47:01,903 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 479 transitions, 8032 flow [2024-06-03 20:47:01,903 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) [2024-06-03 20:47:01,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:01,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:01,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-03 20:47:01,903 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)] === [2024-06-03 20:47:01,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:01,904 INFO L85 PathProgramCache]: Analyzing trace with hash -2028132020, now seen corresponding path program 10 times [2024-06-03 20:47:01,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:01,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708081246] [2024-06-03 20:47:01,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:01,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:01,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:02,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:02,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:02,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708081246] [2024-06-03 20:47:02,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708081246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:02,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:02,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:02,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540859306] [2024-06-03 20:47:02,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:02,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:02,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:02,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:02,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:02,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:02,171 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) [2024-06-03 20:47:02,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:02,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:02,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:03,127 INFO L124 PetriNetUnfolderBase]: 3154/5428 cut-off events. [2024-06-03 20:47:03,127 INFO L125 PetriNetUnfolderBase]: For 915853/915857 co-relation queries the response was YES. [2024-06-03 20:47:03,190 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. [2024-06-03 20:47:03,210 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 388 selfloop transitions, 104 changer transitions 0/499 dead transitions. [2024-06-03 20:47:03,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 499 transitions, 9080 flow [2024-06-03 20:47:03,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:47:03,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:47:03,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-03 20:47:03,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5343915343915344 [2024-06-03 20:47:03,211 INFO L175 Difference]: Start difference. First operand has 414 places, 479 transitions, 8032 flow. Second operand 9 states and 202 transitions. [2024-06-03 20:47:03,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 499 transitions, 9080 flow [2024-06-03 20:47:07,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 499 transitions, 8834 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-03 20:47:07,781 INFO L231 Difference]: Finished difference. Result has 416 places, 479 transitions, 8000 flow [2024-06-03 20:47:07,781 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} [2024-06-03 20:47:07,781 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 373 predicate places. [2024-06-03 20:47:07,781 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 479 transitions, 8000 flow [2024-06-03 20:47:07,782 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) [2024-06-03 20:47:07,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:07,782 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] [2024-06-03 20:47:07,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-03 20:47:07,782 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)] === [2024-06-03 20:47:07,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:07,782 INFO L85 PathProgramCache]: Analyzing trace with hash -948120, now seen corresponding path program 11 times [2024-06-03 20:47:07,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:07,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367304072] [2024-06-03 20:47:07,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:07,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:07,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:07,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:07,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:07,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367304072] [2024-06-03 20:47:07,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367304072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:07,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:07,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:07,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672616425] [2024-06-03 20:47:07,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:07,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:07,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:07,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:07,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:08,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:08,038 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) [2024-06-03 20:47:08,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:08,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:08,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:09,034 INFO L124 PetriNetUnfolderBase]: 3124/5380 cut-off events. [2024-06-03 20:47:09,035 INFO L125 PetriNetUnfolderBase]: For 852541/852545 co-relation queries the response was YES. [2024-06-03 20:47:09,098 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. [2024-06-03 20:47:09,118 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 387 selfloop transitions, 109 changer transitions 0/503 dead transitions. [2024-06-03 20:47:09,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 503 transitions, 9082 flow [2024-06-03 20:47:09,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:47:09,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:47:09,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 205 transitions. [2024-06-03 20:47:09,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5423280423280423 [2024-06-03 20:47:09,119 INFO L175 Difference]: Start difference. First operand has 416 places, 479 transitions, 8000 flow. Second operand 9 states and 205 transitions. [2024-06-03 20:47:09,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 503 transitions, 9082 flow [2024-06-03 20:47:13,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 503 transitions, 8896 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-03 20:47:13,079 INFO L231 Difference]: Finished difference. Result has 419 places, 479 transitions, 8039 flow [2024-06-03 20:47:13,080 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} [2024-06-03 20:47:13,080 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 376 predicate places. [2024-06-03 20:47:13,080 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 479 transitions, 8039 flow [2024-06-03 20:47:13,080 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) [2024-06-03 20:47:13,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:13,080 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] [2024-06-03 20:47:13,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-03 20:47:13,081 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)] === [2024-06-03 20:47:13,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:13,081 INFO L85 PathProgramCache]: Analyzing trace with hash -936518376, now seen corresponding path program 12 times [2024-06-03 20:47:13,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:13,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381626552] [2024-06-03 20:47:13,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:13,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:13,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:13,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:13,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:13,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381626552] [2024-06-03 20:47:13,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381626552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:13,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:13,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:47:13,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749607685] [2024-06-03 20:47:13,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:13,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:47:13,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:13,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:47:13,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:47:13,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:13,392 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) [2024-06-03 20:47:13,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:13,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:13,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:14,523 INFO L124 PetriNetUnfolderBase]: 3160/5425 cut-off events. [2024-06-03 20:47:14,524 INFO L125 PetriNetUnfolderBase]: For 869525/869525 co-relation queries the response was YES. [2024-06-03 20:47:14,579 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. [2024-06-03 20:47:14,597 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 434 selfloop transitions, 59 changer transitions 0/500 dead transitions. [2024-06-03 20:47:14,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 500 transitions, 9142 flow [2024-06-03 20:47:14,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:47:14,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:47:14,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-03 20:47:14,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5386904761904762 [2024-06-03 20:47:14,598 INFO L175 Difference]: Start difference. First operand has 419 places, 479 transitions, 8039 flow. Second operand 8 states and 181 transitions. [2024-06-03 20:47:14,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 500 transitions, 9142 flow [2024-06-03 20:47:18,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 500 transitions, 8863 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-03 20:47:18,834 INFO L231 Difference]: Finished difference. Result has 418 places, 481 transitions, 7943 flow [2024-06-03 20:47:18,834 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} [2024-06-03 20:47:18,835 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 375 predicate places. [2024-06-03 20:47:18,835 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 481 transitions, 7943 flow [2024-06-03 20:47:18,835 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) [2024-06-03 20:47:18,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:18,835 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] [2024-06-03 20:47:18,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-03 20:47:18,836 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)] === [2024-06-03 20:47:18,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:18,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1661859752, now seen corresponding path program 13 times [2024-06-03 20:47:18,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:18,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047132961] [2024-06-03 20:47:18,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:18,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:18,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:19,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:19,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:19,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047132961] [2024-06-03 20:47:19,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047132961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:19,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:19,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:47:19,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034083828] [2024-06-03 20:47:19,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:19,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:47:19,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:19,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:47:19,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:47:19,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:19,108 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) [2024-06-03 20:47:19,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:19,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:19,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:20,119 INFO L124 PetriNetUnfolderBase]: 3137/5392 cut-off events. [2024-06-03 20:47:20,119 INFO L125 PetriNetUnfolderBase]: For 801891/801891 co-relation queries the response was YES. [2024-06-03 20:47:20,181 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. [2024-06-03 20:47:20,199 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 382 selfloop transitions, 115 changer transitions 0/504 dead transitions. [2024-06-03 20:47:20,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 504 transitions, 9007 flow [2024-06-03 20:47:20,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:47:20,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:47:20,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 260 transitions. [2024-06-03 20:47:20,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158730158730159 [2024-06-03 20:47:20,200 INFO L175 Difference]: Start difference. First operand has 418 places, 481 transitions, 7943 flow. Second operand 12 states and 260 transitions. [2024-06-03 20:47:20,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 504 transitions, 9007 flow [2024-06-03 20:47:24,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 504 transitions, 8863 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-03 20:47:24,778 INFO L231 Difference]: Finished difference. Result has 424 places, 481 transitions, 8035 flow [2024-06-03 20:47:24,778 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} [2024-06-03 20:47:24,779 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 381 predicate places. [2024-06-03 20:47:24,779 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 481 transitions, 8035 flow [2024-06-03 20:47:24,779 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) [2024-06-03 20:47:24,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:24,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:24,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-03 20:47:24,779 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)] === [2024-06-03 20:47:24,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:24,779 INFO L85 PathProgramCache]: Analyzing trace with hash 550239882, now seen corresponding path program 14 times [2024-06-03 20:47:24,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:24,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391906179] [2024-06-03 20:47:24,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:24,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:24,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:25,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:25,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:25,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391906179] [2024-06-03 20:47:25,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391906179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:25,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:25,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:47:25,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512733765] [2024-06-03 20:47:25,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:25,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:47:25,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:25,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:47:25,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:47:25,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:25,059 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) [2024-06-03 20:47:25,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:25,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:25,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:26,063 INFO L124 PetriNetUnfolderBase]: 3107/5344 cut-off events. [2024-06-03 20:47:26,064 INFO L125 PetriNetUnfolderBase]: For 733694/733694 co-relation queries the response was YES. [2024-06-03 20:47:26,128 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. [2024-06-03 20:47:26,148 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 381 selfloop transitions, 118 changer transitions 0/506 dead transitions. [2024-06-03 20:47:26,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 506 transitions, 9125 flow [2024-06-03 20:47:26,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:47:26,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:47:26,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-03 20:47:26,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-03 20:47:26,148 INFO L175 Difference]: Start difference. First operand has 424 places, 481 transitions, 8035 flow. Second operand 10 states and 225 transitions. [2024-06-03 20:47:26,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 506 transitions, 9125 flow [2024-06-03 20:47:30,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 506 transitions, 8889 flow, removed 26 selfloop flow, removed 10 redundant places. [2024-06-03 20:47:30,823 INFO L231 Difference]: Finished difference. Result has 424 places, 481 transitions, 8043 flow [2024-06-03 20:47:30,823 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} [2024-06-03 20:47:30,823 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 381 predicate places. [2024-06-03 20:47:30,823 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 481 transitions, 8043 flow [2024-06-03 20:47:30,823 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) [2024-06-03 20:47:30,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:30,823 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] [2024-06-03 20:47:30,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-03 20:47:30,824 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)] === [2024-06-03 20:47:30,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:30,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1598344620, now seen corresponding path program 1 times [2024-06-03 20:47:30,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:30,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525459534] [2024-06-03 20:47:30,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:30,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:30,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:31,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:31,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:31,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525459534] [2024-06-03 20:47:31,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525459534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:31,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:31,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:31,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925165253] [2024-06-03 20:47:31,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:31,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:31,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:31,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:31,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:31,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:31,110 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) [2024-06-03 20:47:31,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:31,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:31,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:32,091 INFO L124 PetriNetUnfolderBase]: 3115/5358 cut-off events. [2024-06-03 20:47:32,091 INFO L125 PetriNetUnfolderBase]: For 685214/685214 co-relation queries the response was YES. [2024-06-03 20:47:32,157 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. [2024-06-03 20:47:32,177 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 383 selfloop transitions, 110 changer transitions 0/500 dead transitions. [2024-06-03 20:47:32,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 500 transitions, 9133 flow [2024-06-03 20:47:32,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:47:32,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:47:32,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-03 20:47:32,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5264550264550265 [2024-06-03 20:47:32,178 INFO L175 Difference]: Start difference. First operand has 424 places, 481 transitions, 8043 flow. Second operand 9 states and 199 transitions. [2024-06-03 20:47:32,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 500 transitions, 9133 flow [2024-06-03 20:47:37,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 500 transitions, 8874 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-03 20:47:37,124 INFO L231 Difference]: Finished difference. Result has 424 places, 483 transitions, 8077 flow [2024-06-03 20:47:37,124 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} [2024-06-03 20:47:37,124 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 381 predicate places. [2024-06-03 20:47:37,124 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 483 transitions, 8077 flow [2024-06-03 20:47:37,125 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) [2024-06-03 20:47:37,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:37,125 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] [2024-06-03 20:47:37,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-03 20:47:37,125 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)] === [2024-06-03 20:47:37,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:37,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1583107500, now seen corresponding path program 2 times [2024-06-03 20:47:37,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:37,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470760583] [2024-06-03 20:47:37,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:37,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:37,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:37,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:37,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:37,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470760583] [2024-06-03 20:47:37,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470760583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:37,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:37,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:37,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782680545] [2024-06-03 20:47:37,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:37,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:37,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:37,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:37,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:37,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:37,400 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) [2024-06-03 20:47:37,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:37,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:37,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:38,391 INFO L124 PetriNetUnfolderBase]: 3123/5366 cut-off events. [2024-06-03 20:47:38,391 INFO L125 PetriNetUnfolderBase]: For 695432/695432 co-relation queries the response was YES. [2024-06-03 20:47:38,455 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. [2024-06-03 20:47:38,475 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 384 selfloop transitions, 112 changer transitions 0/503 dead transitions. [2024-06-03 20:47:38,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 503 transitions, 9179 flow [2024-06-03 20:47:38,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:47:38,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:47:38,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-03 20:47:38,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5264550264550265 [2024-06-03 20:47:38,476 INFO L175 Difference]: Start difference. First operand has 424 places, 483 transitions, 8077 flow. Second operand 9 states and 199 transitions. [2024-06-03 20:47:38,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 503 transitions, 9179 flow [2024-06-03 20:47:43,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 503 transitions, 8921 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-03 20:47:43,329 INFO L231 Difference]: Finished difference. Result has 427 places, 485 transitions, 8120 flow [2024-06-03 20:47:43,329 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} [2024-06-03 20:47:43,329 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 384 predicate places. [2024-06-03 20:47:43,329 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 485 transitions, 8120 flow [2024-06-03 20:47:43,329 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) [2024-06-03 20:47:43,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:43,330 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] [2024-06-03 20:47:43,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-03 20:47:43,330 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)] === [2024-06-03 20:47:43,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:43,330 INFO L85 PathProgramCache]: Analyzing trace with hash 92963066, now seen corresponding path program 15 times [2024-06-03 20:47:43,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:43,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342648164] [2024-06-03 20:47:43,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:43,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:43,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:43,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:43,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:43,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342648164] [2024-06-03 20:47:43,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342648164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:43,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:43,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:43,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956520574] [2024-06-03 20:47:43,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:43,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:43,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:43,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:43,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:43,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:43,607 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) [2024-06-03 20:47:43,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:43,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:43,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:44,735 INFO L124 PetriNetUnfolderBase]: 3159/5435 cut-off events. [2024-06-03 20:47:44,735 INFO L125 PetriNetUnfolderBase]: For 775176/775176 co-relation queries the response was YES. [2024-06-03 20:47:44,792 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. [2024-06-03 20:47:44,811 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 414 selfloop transitions, 102 changer transitions 0/523 dead transitions. [2024-06-03 20:47:44,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 523 transitions, 9329 flow [2024-06-03 20:47:44,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:47:44,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:47:44,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-03 20:47:44,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6160714285714286 [2024-06-03 20:47:44,812 INFO L175 Difference]: Start difference. First operand has 427 places, 485 transitions, 8120 flow. Second operand 8 states and 207 transitions. [2024-06-03 20:47:44,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 523 transitions, 9329 flow [2024-06-03 20:47:50,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 523 transitions, 9044 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-03 20:47:50,019 INFO L231 Difference]: Finished difference. Result has 428 places, 487 transitions, 8126 flow [2024-06-03 20:47:50,020 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} [2024-06-03 20:47:50,020 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 385 predicate places. [2024-06-03 20:47:50,020 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 487 transitions, 8126 flow [2024-06-03 20:47:50,020 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) [2024-06-03 20:47:50,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:50,020 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] [2024-06-03 20:47:50,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-03 20:47:50,020 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)] === [2024-06-03 20:47:50,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:50,021 INFO L85 PathProgramCache]: Analyzing trace with hash 357340904, now seen corresponding path program 16 times [2024-06-03 20:47:50,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:50,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031742780] [2024-06-03 20:47:50,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:50,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:50,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:50,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:50,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:50,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031742780] [2024-06-03 20:47:50,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031742780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:50,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:50,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:50,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379433385] [2024-06-03 20:47:50,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:50,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:50,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:50,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:50,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:50,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:50,304 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) [2024-06-03 20:47:50,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:50,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:50,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:51,274 INFO L124 PetriNetUnfolderBase]: 3136/5395 cut-off events. [2024-06-03 20:47:51,274 INFO L125 PetriNetUnfolderBase]: For 701352/701352 co-relation queries the response was YES. [2024-06-03 20:47:51,337 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. [2024-06-03 20:47:51,357 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 423 selfloop transitions, 84 changer transitions 0/514 dead transitions. [2024-06-03 20:47:51,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 514 transitions, 9224 flow [2024-06-03 20:47:51,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:47:51,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:47:51,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-03 20:47:51,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-03 20:47:51,358 INFO L175 Difference]: Start difference. First operand has 428 places, 487 transitions, 8126 flow. Second operand 7 states and 179 transitions. [2024-06-03 20:47:51,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 514 transitions, 9224 flow [2024-06-03 20:47:56,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 514 transitions, 9017 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-03 20:47:56,088 INFO L231 Difference]: Finished difference. Result has 429 places, 487 transitions, 8096 flow [2024-06-03 20:47:56,088 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} [2024-06-03 20:47:56,089 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 386 predicate places. [2024-06-03 20:47:56,089 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 487 transitions, 8096 flow [2024-06-03 20:47:56,089 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) [2024-06-03 20:47:56,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:56,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:56,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-03 20:47:56,090 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)] === [2024-06-03 20:47:56,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:56,090 INFO L85 PathProgramCache]: Analyzing trace with hash 366864104, now seen corresponding path program 17 times [2024-06-03 20:47:56,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:56,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463154487] [2024-06-03 20:47:56,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:56,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:56,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:56,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:56,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:56,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463154487] [2024-06-03 20:47:56,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463154487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:56,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:56,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:56,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306973323] [2024-06-03 20:47:56,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:56,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:56,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:56,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:56,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:56,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:56,390 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) [2024-06-03 20:47:56,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:56,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:56,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:57,325 INFO L124 PetriNetUnfolderBase]: 3106/5352 cut-off events. [2024-06-03 20:47:57,325 INFO L125 PetriNetUnfolderBase]: For 623642/623642 co-relation queries the response was YES. [2024-06-03 20:47:57,386 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. [2024-06-03 20:47:57,404 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 414 selfloop transitions, 99 changer transitions 0/520 dead transitions. [2024-06-03 20:47:57,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 520 transitions, 9246 flow [2024-06-03 20:47:57,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:47:57,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:47:57,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-03 20:47:57,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-06-03 20:47:57,405 INFO L175 Difference]: Start difference. First operand has 429 places, 487 transitions, 8096 flow. Second operand 7 states and 184 transitions. [2024-06-03 20:47:57,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 520 transitions, 9246 flow [2024-06-03 20:48:02,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 520 transitions, 9007 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-03 20:48:02,549 INFO L231 Difference]: Finished difference. Result has 430 places, 487 transitions, 8066 flow [2024-06-03 20:48:02,550 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} [2024-06-03 20:48:02,550 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 387 predicate places. [2024-06-03 20:48:02,550 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 487 transitions, 8066 flow [2024-06-03 20:48:02,550 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) [2024-06-03 20:48:02,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:02,550 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] [2024-06-03 20:48:02,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-03 20:48:02,551 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)] === [2024-06-03 20:48:02,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:02,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1612494528, now seen corresponding path program 3 times [2024-06-03 20:48:02,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:02,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389927369] [2024-06-03 20:48:02,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:02,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:02,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:02,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:02,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:02,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389927369] [2024-06-03 20:48:02,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389927369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:02,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:02,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:48:02,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337695347] [2024-06-03 20:48:02,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:02,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:48:02,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:02,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:48:02,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:48:02,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:02,905 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) [2024-06-03 20:48:02,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:02,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:02,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:03,902 INFO L124 PetriNetUnfolderBase]: 3114/5373 cut-off events. [2024-06-03 20:48:03,903 INFO L125 PetriNetUnfolderBase]: For 563964/563964 co-relation queries the response was YES. [2024-06-03 20:48:03,963 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. [2024-06-03 20:48:03,980 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 420 selfloop transitions, 94 changer transitions 1/522 dead transitions. [2024-06-03 20:48:03,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 522 transitions, 9260 flow [2024-06-03 20:48:03,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:48:03,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:48:03,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-03 20:48:03,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6101190476190477 [2024-06-03 20:48:03,981 INFO L175 Difference]: Start difference. First operand has 430 places, 487 transitions, 8066 flow. Second operand 8 states and 205 transitions. [2024-06-03 20:48:03,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 522 transitions, 9260 flow [2024-06-03 20:48:08,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 522 transitions, 8938 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-03 20:48:08,139 INFO L231 Difference]: Finished difference. Result has 430 places, 489 transitions, 8019 flow [2024-06-03 20:48:08,139 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} [2024-06-03 20:48:08,139 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 387 predicate places. [2024-06-03 20:48:08,139 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 489 transitions, 8019 flow [2024-06-03 20:48:08,139 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) [2024-06-03 20:48:08,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:08,140 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] [2024-06-03 20:48:08,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-03 20:48:08,140 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)] === [2024-06-03 20:48:08,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:08,141 INFO L85 PathProgramCache]: Analyzing trace with hash 2018614036, now seen corresponding path program 4 times [2024-06-03 20:48:08,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:08,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039244519] [2024-06-03 20:48:08,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:08,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:08,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:08,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:08,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:08,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039244519] [2024-06-03 20:48:08,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039244519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:08,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:08,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:48:08,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702833943] [2024-06-03 20:48:08,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:08,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:48:08,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:08,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:48:08,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:48:08,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:08,442 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) [2024-06-03 20:48:08,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:08,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:08,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:09,455 INFO L124 PetriNetUnfolderBase]: 3168/5449 cut-off events. [2024-06-03 20:48:09,455 INFO L125 PetriNetUnfolderBase]: For 628998/628998 co-relation queries the response was YES. [2024-06-03 20:48:09,519 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. [2024-06-03 20:48:09,538 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 411 selfloop transitions, 115 changer transitions 1/534 dead transitions. [2024-06-03 20:48:09,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 534 transitions, 9631 flow [2024-06-03 20:48:09,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:48:09,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:48:09,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-03 20:48:09,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6279761904761905 [2024-06-03 20:48:09,539 INFO L175 Difference]: Start difference. First operand has 430 places, 489 transitions, 8019 flow. Second operand 8 states and 211 transitions. [2024-06-03 20:48:09,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 534 transitions, 9631 flow [2024-06-03 20:48:13,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 534 transitions, 9390 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-03 20:48:13,733 INFO L231 Difference]: Finished difference. Result has 433 places, 493 transitions, 8181 flow [2024-06-03 20:48:13,733 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} [2024-06-03 20:48:13,733 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 390 predicate places. [2024-06-03 20:48:13,733 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 493 transitions, 8181 flow [2024-06-03 20:48:13,733 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) [2024-06-03 20:48:13,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:13,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:13,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-03 20:48:13,733 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)] === [2024-06-03 20:48:13,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:13,734 INFO L85 PathProgramCache]: Analyzing trace with hash -2033454000, now seen corresponding path program 5 times [2024-06-03 20:48:13,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:13,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170286113] [2024-06-03 20:48:13,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:13,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:13,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:13,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:13,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:13,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170286113] [2024-06-03 20:48:13,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170286113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:13,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:13,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:48:13,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576254587] [2024-06-03 20:48:13,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:13,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:48:13,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:13,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:48:13,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:48:14,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:14,008 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) [2024-06-03 20:48:14,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:14,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:14,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:15,069 INFO L124 PetriNetUnfolderBase]: 3209/5520 cut-off events. [2024-06-03 20:48:15,070 INFO L125 PetriNetUnfolderBase]: For 701405/701405 co-relation queries the response was YES. [2024-06-03 20:48:15,129 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. [2024-06-03 20:48:15,146 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 426 selfloop transitions, 89 changer transitions 0/522 dead transitions. [2024-06-03 20:48:15,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 522 transitions, 9708 flow [2024-06-03 20:48:15,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:48:15,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:48:15,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-03 20:48:15,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-03 20:48:15,147 INFO L175 Difference]: Start difference. First operand has 433 places, 493 transitions, 8181 flow. Second operand 7 states and 176 transitions. [2024-06-03 20:48:15,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 522 transitions, 9708 flow [2024-06-03 20:48:21,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 522 transitions, 9514 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-03 20:48:21,648 INFO L231 Difference]: Finished difference. Result has 437 places, 497 transitions, 8359 flow [2024-06-03 20:48:21,648 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} [2024-06-03 20:48:21,648 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 394 predicate places. [2024-06-03 20:48:21,649 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 497 transitions, 8359 flow [2024-06-03 20:48:21,649 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) [2024-06-03 20:48:21,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:21,649 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] [2024-06-03 20:48:21,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-03 20:48:21,649 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)] === [2024-06-03 20:48:21,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:21,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1629214984, now seen corresponding path program 6 times [2024-06-03 20:48:21,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:21,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153559748] [2024-06-03 20:48:21,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:21,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:21,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:21,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:21,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:21,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153559748] [2024-06-03 20:48:21,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153559748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:21,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:21,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:48:21,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306334687] [2024-06-03 20:48:21,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:21,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:48:21,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:21,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:48:21,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:48:21,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:21,924 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) [2024-06-03 20:48:21,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:21,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:21,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:22,931 INFO L124 PetriNetUnfolderBase]: 3204/5518 cut-off events. [2024-06-03 20:48:22,932 INFO L125 PetriNetUnfolderBase]: For 685046/685046 co-relation queries the response was YES. [2024-06-03 20:48:22,997 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. [2024-06-03 20:48:23,017 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 430 selfloop transitions, 82 changer transitions 0/519 dead transitions. [2024-06-03 20:48:23,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 519 transitions, 9488 flow [2024-06-03 20:48:23,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:48:23,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:48:23,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-03 20:48:23,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5850340136054422 [2024-06-03 20:48:23,018 INFO L175 Difference]: Start difference. First operand has 437 places, 497 transitions, 8359 flow. Second operand 7 states and 172 transitions. [2024-06-03 20:48:23,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 519 transitions, 9488 flow [2024-06-03 20:48:27,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 519 transitions, 9314 flow, removed 40 selfloop flow, removed 3 redundant places. [2024-06-03 20:48:27,882 INFO L231 Difference]: Finished difference. Result has 441 places, 498 transitions, 8409 flow [2024-06-03 20:48:27,882 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} [2024-06-03 20:48:27,882 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 398 predicate places. [2024-06-03 20:48:27,882 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 498 transitions, 8409 flow [2024-06-03 20:48:27,883 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) [2024-06-03 20:48:27,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:27,883 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] [2024-06-03 20:48:27,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-03 20:48:27,883 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)] === [2024-06-03 20:48:27,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:27,883 INFO L85 PathProgramCache]: Analyzing trace with hash 160713024, now seen corresponding path program 7 times [2024-06-03 20:48:27,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:27,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261477704] [2024-06-03 20:48:27,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:27,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:27,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:28,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:28,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:28,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261477704] [2024-06-03 20:48:28,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261477704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:28,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:28,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:48:28,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332807751] [2024-06-03 20:48:28,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:28,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:48:28,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:28,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:48:28,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:48:28,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:28,162 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) [2024-06-03 20:48:28,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:28,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:28,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:29,297 INFO L124 PetriNetUnfolderBase]: 3379/5829 cut-off events. [2024-06-03 20:48:29,297 INFO L125 PetriNetUnfolderBase]: For 967719/967719 co-relation queries the response was YES. [2024-06-03 20:48:29,367 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. [2024-06-03 20:48:29,387 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 419 selfloop transitions, 111 changer transitions 0/537 dead transitions. [2024-06-03 20:48:29,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 537 transitions, 10323 flow [2024-06-03 20:48:29,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:48:29,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:48:29,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-03 20:48:29,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6224489795918368 [2024-06-03 20:48:29,388 INFO L175 Difference]: Start difference. First operand has 441 places, 498 transitions, 8409 flow. Second operand 7 states and 183 transitions. [2024-06-03 20:48:29,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 537 transitions, 10323 flow [2024-06-03 20:48:34,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 537 transitions, 10096 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-03 20:48:34,629 INFO L231 Difference]: Finished difference. Result has 444 places, 505 transitions, 8693 flow [2024-06-03 20:48:34,629 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} [2024-06-03 20:48:34,629 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 401 predicate places. [2024-06-03 20:48:34,630 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 505 transitions, 8693 flow [2024-06-03 20:48:34,630 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) [2024-06-03 20:48:34,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:34,630 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] [2024-06-03 20:48:34,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-03 20:48:34,630 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)] === [2024-06-03 20:48:34,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:34,630 INFO L85 PathProgramCache]: Analyzing trace with hash 154046784, now seen corresponding path program 8 times [2024-06-03 20:48:34,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:34,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722314701] [2024-06-03 20:48:34,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:34,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:34,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:34,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:34,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:34,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722314701] [2024-06-03 20:48:34,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722314701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:34,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:34,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:48:34,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463059502] [2024-06-03 20:48:34,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:34,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:48:34,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:34,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:48:34,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:48:34,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:34,894 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) [2024-06-03 20:48:34,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:34,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:34,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:36,063 INFO L124 PetriNetUnfolderBase]: 3374/5822 cut-off events. [2024-06-03 20:48:36,063 INFO L125 PetriNetUnfolderBase]: For 967548/967548 co-relation queries the response was YES. [2024-06-03 20:48:36,133 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. [2024-06-03 20:48:36,154 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 419 selfloop transitions, 113 changer transitions 0/539 dead transitions. [2024-06-03 20:48:36,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 539 transitions, 10474 flow [2024-06-03 20:48:36,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:48:36,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:48:36,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-03 20:48:36,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-06-03 20:48:36,155 INFO L175 Difference]: Start difference. First operand has 444 places, 505 transitions, 8693 flow. Second operand 7 states and 184 transitions. [2024-06-03 20:48:36,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 539 transitions, 10474 flow [2024-06-03 20:48:41,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 539 transitions, 10244 flow, removed 47 selfloop flow, removed 3 redundant places. [2024-06-03 20:48:41,823 INFO L231 Difference]: Finished difference. Result has 448 places, 506 transitions, 8751 flow [2024-06-03 20:48:41,824 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} [2024-06-03 20:48:41,824 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 405 predicate places. [2024-06-03 20:48:41,824 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 506 transitions, 8751 flow [2024-06-03 20:48:41,824 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) [2024-06-03 20:48:41,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:41,825 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] [2024-06-03 20:48:41,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-03 20:48:41,825 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)] === [2024-06-03 20:48:41,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:41,825 INFO L85 PathProgramCache]: Analyzing trace with hash -803641798, now seen corresponding path program 1 times [2024-06-03 20:48:41,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:41,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798691739] [2024-06-03 20:48:41,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:41,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:41,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:42,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:42,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:42,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798691739] [2024-06-03 20:48:42,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798691739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:42,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:42,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:48:42,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811178889] [2024-06-03 20:48:42,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:42,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:48:42,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:42,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:48:42,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:48:42,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:42,142 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) [2024-06-03 20:48:42,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:42,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:42,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:43,359 INFO L124 PetriNetUnfolderBase]: 3454/5948 cut-off events. [2024-06-03 20:48:43,359 INFO L125 PetriNetUnfolderBase]: For 1097327/1097327 co-relation queries the response was YES. [2024-06-03 20:48:43,431 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. [2024-06-03 20:48:43,453 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 496 selfloop transitions, 52 changer transitions 4/559 dead transitions. [2024-06-03 20:48:43,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 559 transitions, 10795 flow [2024-06-03 20:48:43,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:48:43,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:48:43,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 242 transitions. [2024-06-03 20:48:43,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5761904761904761 [2024-06-03 20:48:43,454 INFO L175 Difference]: Start difference. First operand has 448 places, 506 transitions, 8751 flow. Second operand 10 states and 242 transitions. [2024-06-03 20:48:43,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 559 transitions, 10795 flow [2024-06-03 20:48:50,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 559 transitions, 10390 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-03 20:48:50,259 INFO L231 Difference]: Finished difference. Result has 453 places, 511 transitions, 8662 flow [2024-06-03 20:48:50,259 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} [2024-06-03 20:48:50,259 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 410 predicate places. [2024-06-03 20:48:50,259 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 511 transitions, 8662 flow [2024-06-03 20:48:50,259 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) [2024-06-03 20:48:50,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:50,259 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] [2024-06-03 20:48:50,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-03 20:48:50,260 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)] === [2024-06-03 20:48:50,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:50,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1374578646, now seen corresponding path program 2 times [2024-06-03 20:48:50,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:50,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50911010] [2024-06-03 20:48:50,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:50,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:50,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:50,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:50,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:50,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50911010] [2024-06-03 20:48:50,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50911010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:50,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:50,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:48:50,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092519589] [2024-06-03 20:48:50,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:50,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:48:50,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:50,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:48:50,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:48:50,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:50,543 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) [2024-06-03 20:48:50,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:50,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:50,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:51,893 INFO L124 PetriNetUnfolderBase]: 3591/6197 cut-off events. [2024-06-03 20:48:51,893 INFO L125 PetriNetUnfolderBase]: For 1140058/1140058 co-relation queries the response was YES. [2024-06-03 20:48:51,965 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. [2024-06-03 20:48:51,985 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 511 selfloop transitions, 35 changer transitions 6/559 dead transitions. [2024-06-03 20:48:51,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 559 transitions, 10245 flow [2024-06-03 20:48:51,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:48:51,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:48:51,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-03 20:48:51,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-06-03 20:48:51,986 INFO L175 Difference]: Start difference. First operand has 453 places, 511 transitions, 8662 flow. Second operand 8 states and 203 transitions. [2024-06-03 20:48:51,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 559 transitions, 10245 flow [2024-06-03 20:48:59,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 559 transitions, 10046 flow, removed 80 selfloop flow, removed 4 redundant places. [2024-06-03 20:48:59,628 INFO L231 Difference]: Finished difference. Result has 458 places, 514 transitions, 8612 flow [2024-06-03 20:48:59,628 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} [2024-06-03 20:48:59,629 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 415 predicate places. [2024-06-03 20:48:59,629 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 514 transitions, 8612 flow [2024-06-03 20:48:59,629 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) [2024-06-03 20:48:59,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:59,629 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] [2024-06-03 20:48:59,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-03 20:48:59,630 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)] === [2024-06-03 20:48:59,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:59,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1272645634, now seen corresponding path program 3 times [2024-06-03 20:48:59,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:59,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612937343] [2024-06-03 20:48:59,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:59,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:59,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:59,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:59,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:59,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612937343] [2024-06-03 20:48:59,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612937343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:59,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:59,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:48:59,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873344043] [2024-06-03 20:48:59,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:59,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:48:59,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:59,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:48:59,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:49:00,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:00,002 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) [2024-06-03 20:49:00,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:00,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:00,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:01,332 INFO L124 PetriNetUnfolderBase]: 3599/6207 cut-off events. [2024-06-03 20:49:01,333 INFO L125 PetriNetUnfolderBase]: For 1162105/1162105 co-relation queries the response was YES. [2024-06-03 20:49:01,412 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. [2024-06-03 20:49:01,435 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 503 selfloop transitions, 45 changer transitions 2/557 dead transitions. [2024-06-03 20:49:01,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 557 transitions, 10258 flow [2024-06-03 20:49:01,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:49:01,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:49:01,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-03 20:49:01,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-03 20:49:01,435 INFO L175 Difference]: Start difference. First operand has 458 places, 514 transitions, 8612 flow. Second operand 9 states and 216 transitions. [2024-06-03 20:49:01,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 557 transitions, 10258 flow [2024-06-03 20:49:07,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 557 transitions, 10198 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-03 20:49:07,738 INFO L231 Difference]: Finished difference. Result has 462 places, 518 transitions, 8815 flow [2024-06-03 20:49:07,739 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} [2024-06-03 20:49:07,739 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 419 predicate places. [2024-06-03 20:49:07,739 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 518 transitions, 8815 flow [2024-06-03 20:49:07,739 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) [2024-06-03 20:49:07,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:07,739 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] [2024-06-03 20:49:07,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-03 20:49:07,739 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)] === [2024-06-03 20:49:07,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:07,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1617188616, now seen corresponding path program 4 times [2024-06-03 20:49:07,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:07,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185047681] [2024-06-03 20:49:07,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:07,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:07,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:07,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:07,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:07,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185047681] [2024-06-03 20:49:07,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185047681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:07,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:07,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:49:07,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238947464] [2024-06-03 20:49:07,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:07,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:49:07,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:07,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:49:07,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:49:08,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:08,021 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) [2024-06-03 20:49:08,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:08,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:08,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:09,317 INFO L124 PetriNetUnfolderBase]: 3594/6211 cut-off events. [2024-06-03 20:49:09,317 INFO L125 PetriNetUnfolderBase]: For 1159403/1159403 co-relation queries the response was YES. [2024-06-03 20:49:09,393 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. [2024-06-03 20:49:09,415 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 502 selfloop transitions, 41 changer transitions 0/550 dead transitions. [2024-06-03 20:49:09,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 550 transitions, 9981 flow [2024-06-03 20:49:09,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:49:09,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:49:09,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-03 20:49:09,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5502645502645502 [2024-06-03 20:49:09,416 INFO L175 Difference]: Start difference. First operand has 462 places, 518 transitions, 8815 flow. Second operand 9 states and 208 transitions. [2024-06-03 20:49:09,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 550 transitions, 9981 flow [2024-06-03 20:49:14,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 550 transitions, 9780 flow, removed 69 selfloop flow, removed 6 redundant places. [2024-06-03 20:49:14,617 INFO L231 Difference]: Finished difference. Result has 465 places, 518 transitions, 8701 flow [2024-06-03 20:49:14,618 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} [2024-06-03 20:49:14,618 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 422 predicate places. [2024-06-03 20:49:14,618 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 518 transitions, 8701 flow [2024-06-03 20:49:14,618 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) [2024-06-03 20:49:14,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:14,618 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] [2024-06-03 20:49:14,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-03 20:49:14,618 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)] === [2024-06-03 20:49:14,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:14,619 INFO L85 PathProgramCache]: Analyzing trace with hash -175707085, now seen corresponding path program 1 times [2024-06-03 20:49:14,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:14,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182763700] [2024-06-03 20:49:14,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:14,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:14,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:14,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:14,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:14,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182763700] [2024-06-03 20:49:14,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182763700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:14,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:14,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:49:14,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751098248] [2024-06-03 20:49:14,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:14,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:49:14,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:14,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:49:14,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:49:14,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:14,857 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) [2024-06-03 20:49:14,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:14,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:14,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:16,209 INFO L124 PetriNetUnfolderBase]: 3591/6198 cut-off events. [2024-06-03 20:49:16,210 INFO L125 PetriNetUnfolderBase]: For 1153290/1153290 co-relation queries the response was YES. [2024-06-03 20:49:16,283 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. [2024-06-03 20:49:16,306 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 398 selfloop transitions, 131 changer transitions 0/536 dead transitions. [2024-06-03 20:49:16,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 536 transitions, 10083 flow [2024-06-03 20:49:16,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:49:16,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:49:16,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-03 20:49:16,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-03 20:49:16,307 INFO L175 Difference]: Start difference. First operand has 465 places, 518 transitions, 8701 flow. Second operand 7 states and 173 transitions. [2024-06-03 20:49:16,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 536 transitions, 10083 flow [2024-06-03 20:49:21,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 536 transitions, 9981 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-03 20:49:21,587 INFO L231 Difference]: Finished difference. Result has 464 places, 518 transitions, 8875 flow [2024-06-03 20:49:21,587 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} [2024-06-03 20:49:21,587 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 421 predicate places. [2024-06-03 20:49:21,587 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 518 transitions, 8875 flow [2024-06-03 20:49:21,587 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) [2024-06-03 20:49:21,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:21,588 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] [2024-06-03 20:49:21,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-03 20:49:21,588 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)] === [2024-06-03 20:49:21,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:21,588 INFO L85 PathProgramCache]: Analyzing trace with hash 522785681, now seen corresponding path program 2 times [2024-06-03 20:49:21,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:21,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114721970] [2024-06-03 20:49:21,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:21,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:21,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:21,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:21,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:21,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114721970] [2024-06-03 20:49:21,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114721970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:21,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:21,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:49:21,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471493297] [2024-06-03 20:49:21,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:21,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:49:21,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:21,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:49:21,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:49:21,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:21,860 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) [2024-06-03 20:49:21,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:21,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:21,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:23,113 INFO L124 PetriNetUnfolderBase]: 3596/6207 cut-off events. [2024-06-03 20:49:23,113 INFO L125 PetriNetUnfolderBase]: For 1170615/1170615 co-relation queries the response was YES. [2024-06-03 20:49:23,190 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. [2024-06-03 20:49:23,211 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 390 selfloop transitions, 146 changer transitions 0/543 dead transitions. [2024-06-03 20:49:23,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 543 transitions, 10327 flow [2024-06-03 20:49:23,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:49:23,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:49:23,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 255 transitions. [2024-06-03 20:49:23,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551948051948052 [2024-06-03 20:49:23,212 INFO L175 Difference]: Start difference. First operand has 464 places, 518 transitions, 8875 flow. Second operand 11 states and 255 transitions. [2024-06-03 20:49:23,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 543 transitions, 10327 flow [2024-06-03 20:49:30,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 543 transitions, 10042 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-03 20:49:30,896 INFO L231 Difference]: Finished difference. Result has 469 places, 521 transitions, 8941 flow [2024-06-03 20:49:30,896 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} [2024-06-03 20:49:30,896 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 426 predicate places. [2024-06-03 20:49:30,897 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 521 transitions, 8941 flow [2024-06-03 20:49:30,897 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) [2024-06-03 20:49:30,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:30,897 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] [2024-06-03 20:49:30,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-03 20:49:30,897 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)] === [2024-06-03 20:49:30,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:30,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1578181781, now seen corresponding path program 3 times [2024-06-03 20:49:30,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:30,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500507014] [2024-06-03 20:49:30,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:30,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:30,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:31,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:31,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:31,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500507014] [2024-06-03 20:49:31,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500507014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:31,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:31,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:49:31,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564306328] [2024-06-03 20:49:31,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:31,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:49:31,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:31,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:49:31,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:49:31,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:31,158 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) [2024-06-03 20:49:31,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:31,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:31,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:32,441 INFO L124 PetriNetUnfolderBase]: 3593/6203 cut-off events. [2024-06-03 20:49:32,441 INFO L125 PetriNetUnfolderBase]: For 1160373/1160373 co-relation queries the response was YES. [2024-06-03 20:49:32,516 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. [2024-06-03 20:49:32,536 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 394 selfloop transitions, 139 changer transitions 0/540 dead transitions. [2024-06-03 20:49:32,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 540 transitions, 10053 flow [2024-06-03 20:49:32,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:49:32,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:49:32,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-03 20:49:32,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5661375661375662 [2024-06-03 20:49:32,537 INFO L175 Difference]: Start difference. First operand has 469 places, 521 transitions, 8941 flow. Second operand 9 states and 214 transitions. [2024-06-03 20:49:32,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 540 transitions, 10053 flow [2024-06-03 20:49:41,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 540 transitions, 9690 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-03 20:49:41,022 INFO L231 Difference]: Finished difference. Result has 468 places, 521 transitions, 8871 flow [2024-06-03 20:49:41,023 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} [2024-06-03 20:49:41,023 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 425 predicate places. [2024-06-03 20:49:41,023 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 521 transitions, 8871 flow [2024-06-03 20:49:41,023 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) [2024-06-03 20:49:41,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:41,023 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] [2024-06-03 20:49:41,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-03 20:49:41,023 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)] === [2024-06-03 20:49:41,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:41,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1549890328, now seen corresponding path program 5 times [2024-06-03 20:49:41,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:41,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166027578] [2024-06-03 20:49:41,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:41,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:41,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:41,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:41,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:41,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166027578] [2024-06-03 20:49:41,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166027578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:41,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:41,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:49:41,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189851448] [2024-06-03 20:49:41,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:41,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:49:41,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:41,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:49:41,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:49:41,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:41,308 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) [2024-06-03 20:49:41,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:41,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:41,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:42,797 INFO L124 PetriNetUnfolderBase]: 3614/6239 cut-off events. [2024-06-03 20:49:42,797 INFO L125 PetriNetUnfolderBase]: For 1192369/1192369 co-relation queries the response was YES. [2024-06-03 20:49:42,867 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. [2024-06-03 20:49:42,886 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 410 selfloop transitions, 141 changer transitions 0/558 dead transitions. [2024-06-03 20:49:42,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 558 transitions, 10515 flow [2024-06-03 20:49:42,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:49:42,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:49:42,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 248 transitions. [2024-06-03 20:49:42,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5367965367965368 [2024-06-03 20:49:42,887 INFO L175 Difference]: Start difference. First operand has 468 places, 521 transitions, 8871 flow. Second operand 11 states and 248 transitions. [2024-06-03 20:49:42,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 558 transitions, 10515 flow [2024-06-03 20:49:48,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 558 transitions, 10224 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-03 20:49:48,721 INFO L231 Difference]: Finished difference. Result has 470 places, 525 transitions, 9053 flow [2024-06-03 20:49:48,722 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} [2024-06-03 20:49:48,722 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 427 predicate places. [2024-06-03 20:49:48,722 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 525 transitions, 9053 flow [2024-06-03 20:49:48,722 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) [2024-06-03 20:49:48,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:48,722 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] [2024-06-03 20:49:48,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-03 20:49:48,723 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)] === [2024-06-03 20:49:48,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:48,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1087519112, now seen corresponding path program 6 times [2024-06-03 20:49:48,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:48,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766845752] [2024-06-03 20:49:48,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:48,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:48,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:48,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:48,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:48,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766845752] [2024-06-03 20:49:48,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766845752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:48,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:48,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:49:48,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191793165] [2024-06-03 20:49:48,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:48,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:49:48,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:48,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:49:48,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:49:49,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:49,061 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) [2024-06-03 20:49:49,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:49,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:49,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:50,324 INFO L124 PetriNetUnfolderBase]: 3622/6256 cut-off events. [2024-06-03 20:49:50,325 INFO L125 PetriNetUnfolderBase]: For 1194756/1194756 co-relation queries the response was YES. [2024-06-03 20:49:50,402 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. [2024-06-03 20:49:50,425 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 271 selfloop transitions, 279 changer transitions 0/557 dead transitions. [2024-06-03 20:49:50,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 557 transitions, 10601 flow [2024-06-03 20:49:50,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:49:50,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:49:50,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 270 transitions. [2024-06-03 20:49:50,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-03 20:49:50,427 INFO L175 Difference]: Start difference. First operand has 470 places, 525 transitions, 9053 flow. Second operand 12 states and 270 transitions. [2024-06-03 20:49:50,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 557 transitions, 10601 flow [2024-06-03 20:49:56,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 557 transitions, 10289 flow, removed 71 selfloop flow, removed 7 redundant places. [2024-06-03 20:49:56,674 INFO L231 Difference]: Finished difference. Result has 475 places, 527 transitions, 9402 flow [2024-06-03 20:49:56,674 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} [2024-06-03 20:49:56,674 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 432 predicate places. [2024-06-03 20:49:56,674 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 527 transitions, 9402 flow [2024-06-03 20:49:56,674 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) [2024-06-03 20:49:56,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:56,675 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] [2024-06-03 20:49:56,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-03 20:49:56,675 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)] === [2024-06-03 20:49:56,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:56,675 INFO L85 PathProgramCache]: Analyzing trace with hash 850943160, now seen corresponding path program 7 times [2024-06-03 20:49:56,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:56,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276464185] [2024-06-03 20:49:56,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:56,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:56,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:56,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:56,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:56,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276464185] [2024-06-03 20:49:56,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276464185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:56,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:56,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:49:56,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931328536] [2024-06-03 20:49:56,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:56,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:49:56,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:56,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:49:56,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:49:56,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:56,941 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) [2024-06-03 20:49:56,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:56,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:56,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:58,245 INFO L124 PetriNetUnfolderBase]: 3630/6268 cut-off events. [2024-06-03 20:49:58,245 INFO L125 PetriNetUnfolderBase]: For 1210755/1210755 co-relation queries the response was YES. [2024-06-03 20:49:58,330 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. [2024-06-03 20:49:58,353 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 272 selfloop transitions, 276 changer transitions 0/555 dead transitions. [2024-06-03 20:49:58,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 555 transitions, 10914 flow [2024-06-03 20:49:58,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:49:58,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:49:58,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 249 transitions. [2024-06-03 20:49:58,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.538961038961039 [2024-06-03 20:49:58,354 INFO L175 Difference]: Start difference. First operand has 475 places, 527 transitions, 9402 flow. Second operand 11 states and 249 transitions. [2024-06-03 20:49:58,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 555 transitions, 10914 flow [2024-06-03 20:50:05,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 555 transitions, 10301 flow, removed 29 selfloop flow, removed 10 redundant places. [2024-06-03 20:50:05,111 INFO L231 Difference]: Finished difference. Result has 476 places, 529 transitions, 9420 flow [2024-06-03 20:50:05,112 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} [2024-06-03 20:50:05,112 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 433 predicate places. [2024-06-03 20:50:05,112 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 529 transitions, 9420 flow [2024-06-03 20:50:05,112 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) [2024-06-03 20:50:05,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:05,113 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] [2024-06-03 20:50:05,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-03 20:50:05,113 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)] === [2024-06-03 20:50:05,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:05,113 INFO L85 PathProgramCache]: Analyzing trace with hash -893564970, now seen corresponding path program 8 times [2024-06-03 20:50:05,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:05,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400342599] [2024-06-03 20:50:05,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:05,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:05,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:05,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:05,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:05,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400342599] [2024-06-03 20:50:05,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400342599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:05,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:05,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:50:05,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033424638] [2024-06-03 20:50:05,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:05,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:50:05,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:05,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:50:05,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:50:05,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:50:05,501 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) [2024-06-03 20:50:05,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:05,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:50:05,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:06,905 INFO L124 PetriNetUnfolderBase]: 3661/6311 cut-off events. [2024-06-03 20:50:06,905 INFO L125 PetriNetUnfolderBase]: For 1316701/1316701 co-relation queries the response was YES. [2024-06-03 20:50:06,980 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. [2024-06-03 20:50:07,001 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 477 selfloop transitions, 81 changer transitions 0/565 dead transitions. [2024-06-03 20:50:07,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 565 transitions, 10734 flow [2024-06-03 20:50:07,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:50:07,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:50:07,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-03 20:50:07,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6011904761904762 [2024-06-03 20:50:07,002 INFO L175 Difference]: Start difference. First operand has 476 places, 529 transitions, 9420 flow. Second operand 8 states and 202 transitions. [2024-06-03 20:50:07,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 565 transitions, 10734 flow [2024-06-03 20:50:13,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 565 transitions, 10067 flow, removed 59 selfloop flow, removed 9 redundant places. [2024-06-03 20:50:13,773 INFO L231 Difference]: Finished difference. Result has 475 places, 531 transitions, 9025 flow [2024-06-03 20:50:13,773 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} [2024-06-03 20:50:13,774 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 432 predicate places. [2024-06-03 20:50:13,774 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 531 transitions, 9025 flow [2024-06-03 20:50:13,774 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) [2024-06-03 20:50:13,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:13,774 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] [2024-06-03 20:50:13,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-03 20:50:13,774 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)] === [2024-06-03 20:50:13,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:13,774 INFO L85 PathProgramCache]: Analyzing trace with hash -784624589, now seen corresponding path program 4 times [2024-06-03 20:50:13,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:13,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183926862] [2024-06-03 20:50:13,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:13,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:13,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:13,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:13,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:13,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183926862] [2024-06-03 20:50:13,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183926862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:13,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:13,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:50:13,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791237965] [2024-06-03 20:50:13,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:13,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:50:13,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:13,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:50:13,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:50:14,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:50:14,010 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) [2024-06-03 20:50:14,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:14,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:50:14,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:15,550 INFO L124 PetriNetUnfolderBase]: 3682/6328 cut-off events. [2024-06-03 20:50:15,551 INFO L125 PetriNetUnfolderBase]: For 1238293/1238293 co-relation queries the response was YES. [2024-06-03 20:50:15,621 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. [2024-06-03 20:50:15,640 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 311 selfloop transitions, 249 changer transitions 0/567 dead transitions. [2024-06-03 20:50:15,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 567 transitions, 10915 flow [2024-06-03 20:50:15,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:50:15,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:50:15,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 264 transitions. [2024-06-03 20:50:15,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-03 20:50:15,641 INFO L175 Difference]: Start difference. First operand has 475 places, 531 transitions, 9025 flow. Second operand 12 states and 264 transitions. [2024-06-03 20:50:15,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 567 transitions, 10915 flow [2024-06-03 20:50:23,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 567 transitions, 10690 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-03 20:50:23,873 INFO L231 Difference]: Finished difference. Result has 482 places, 540 transitions, 9435 flow [2024-06-03 20:50:23,873 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} [2024-06-03 20:50:23,874 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 439 predicate places. [2024-06-03 20:50:23,874 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 540 transitions, 9435 flow [2024-06-03 20:50:23,874 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) [2024-06-03 20:50:23,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:23,874 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] [2024-06-03 20:50:23,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-03 20:50:23,874 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)] === [2024-06-03 20:50:23,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:23,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1224952265, now seen corresponding path program 5 times [2024-06-03 20:50:23,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:23,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867301198] [2024-06-03 20:50:23,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:23,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:23,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:24,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:24,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:24,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867301198] [2024-06-03 20:50:24,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867301198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:24,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:24,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:50:24,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132715460] [2024-06-03 20:50:24,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:24,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:50:24,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:24,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:50:24,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:50:24,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:50:24,184 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) [2024-06-03 20:50:24,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:24,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:50:24,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:25,493 INFO L124 PetriNetUnfolderBase]: 3687/6352 cut-off events. [2024-06-03 20:50:25,494 INFO L125 PetriNetUnfolderBase]: For 1248108/1248112 co-relation queries the response was YES. [2024-06-03 20:50:25,572 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. [2024-06-03 20:50:25,595 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 465 selfloop transitions, 91 changer transitions 0/563 dead transitions. [2024-06-03 20:50:25,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 563 transitions, 10934 flow [2024-06-03 20:50:25,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:50:25,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:50:25,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-03 20:50:25,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317460317460317 [2024-06-03 20:50:25,596 INFO L175 Difference]: Start difference. First operand has 482 places, 540 transitions, 9435 flow. Second operand 9 states and 201 transitions. [2024-06-03 20:50:25,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 563 transitions, 10934 flow [2024-06-03 20:50:35,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 563 transitions, 10553 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-03 20:50:35,210 INFO L231 Difference]: Finished difference. Result has 483 places, 543 transitions, 9292 flow [2024-06-03 20:50:35,210 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} [2024-06-03 20:50:35,210 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 440 predicate places. [2024-06-03 20:50:35,210 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 543 transitions, 9292 flow [2024-06-03 20:50:35,210 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) [2024-06-03 20:50:35,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:35,211 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] [2024-06-03 20:50:35,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-03 20:50:35,211 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)] === [2024-06-03 20:50:35,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:35,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1512750081, now seen corresponding path program 6 times [2024-06-03 20:50:35,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:35,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701643103] [2024-06-03 20:50:35,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:35,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:35,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:35,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:35,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:35,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701643103] [2024-06-03 20:50:35,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701643103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:35,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:35,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:50:35,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445017509] [2024-06-03 20:50:35,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:35,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:50:35,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:35,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:50:35,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:50:35,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:50:35,491 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) [2024-06-03 20:50:35,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:35,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:50:35,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:36,833 INFO L124 PetriNetUnfolderBase]: 3700/6353 cut-off events. [2024-06-03 20:50:36,834 INFO L125 PetriNetUnfolderBase]: For 1275408/1275408 co-relation queries the response was YES. [2024-06-03 20:50:36,926 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. [2024-06-03 20:50:36,948 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 464 selfloop transitions, 101 changer transitions 0/572 dead transitions. [2024-06-03 20:50:36,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 572 transitions, 10830 flow [2024-06-03 20:50:36,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:50:36,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:50:36,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 255 transitions. [2024-06-03 20:50:36,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5059523809523809 [2024-06-03 20:50:36,949 INFO L175 Difference]: Start difference. First operand has 483 places, 543 transitions, 9292 flow. Second operand 12 states and 255 transitions. [2024-06-03 20:50:36,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 572 transitions, 10830 flow [2024-06-03 20:50:45,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 572 transitions, 10639 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-03 20:50:45,057 INFO L231 Difference]: Finished difference. Result has 489 places, 549 transitions, 9377 flow [2024-06-03 20:50:45,057 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} [2024-06-03 20:50:45,057 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 446 predicate places. [2024-06-03 20:50:45,057 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 549 transitions, 9377 flow [2024-06-03 20:50:45,057 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) [2024-06-03 20:50:45,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:45,058 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] [2024-06-03 20:50:45,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-03 20:50:45,058 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)] === [2024-06-03 20:50:45,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:45,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1541314333, now seen corresponding path program 7 times [2024-06-03 20:50:45,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:45,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798383601] [2024-06-03 20:50:45,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:45,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:45,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:45,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:45,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:45,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798383601] [2024-06-03 20:50:45,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798383601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:45,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:45,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:50:45,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193560680] [2024-06-03 20:50:45,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:45,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:50:45,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:45,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:50:45,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:50:45,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:50:45,307 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) [2024-06-03 20:50:45,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:45,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:50:45,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:46,712 INFO L124 PetriNetUnfolderBase]: 3697/6349 cut-off events. [2024-06-03 20:50:46,713 INFO L125 PetriNetUnfolderBase]: For 1280879/1280879 co-relation queries the response was YES. [2024-06-03 20:50:46,789 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. [2024-06-03 20:50:46,811 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 306 selfloop transitions, 258 changer transitions 0/571 dead transitions. [2024-06-03 20:50:46,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 571 transitions, 10851 flow [2024-06-03 20:50:46,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:50:46,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:50:46,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 243 transitions. [2024-06-03 20:50:46,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525974025974026 [2024-06-03 20:50:46,812 INFO L175 Difference]: Start difference. First operand has 489 places, 549 transitions, 9377 flow. Second operand 11 states and 243 transitions. [2024-06-03 20:50:46,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 571 transitions, 10851 flow [2024-06-03 20:50:53,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 571 transitions, 10723 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-03 20:50:53,492 INFO L231 Difference]: Finished difference. Result has 492 places, 549 transitions, 9772 flow [2024-06-03 20:50:53,492 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} [2024-06-03 20:50:53,493 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 449 predicate places. [2024-06-03 20:50:53,493 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 549 transitions, 9772 flow [2024-06-03 20:50:53,493 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) [2024-06-03 20:50:53,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:53,493 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] [2024-06-03 20:50:53,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-03 20:50:53,493 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)] === [2024-06-03 20:50:53,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:53,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1437689881, now seen corresponding path program 8 times [2024-06-03 20:50:53,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:53,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336341803] [2024-06-03 20:50:53,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:53,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:53,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:53,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:53,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:53,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336341803] [2024-06-03 20:50:53,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336341803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:53,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:53,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:50:53,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320547724] [2024-06-03 20:50:53,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:53,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:50:53,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:53,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:50:53,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:50:53,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:50:53,729 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) [2024-06-03 20:50:53,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:53,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:50:53,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:55,172 INFO L124 PetriNetUnfolderBase]: 3702/6379 cut-off events. [2024-06-03 20:50:55,173 INFO L125 PetriNetUnfolderBase]: For 1299961/1299965 co-relation queries the response was YES. [2024-06-03 20:50:55,249 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. [2024-06-03 20:50:55,270 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 468 selfloop transitions, 92 changer transitions 0/567 dead transitions. [2024-06-03 20:50:55,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 567 transitions, 11267 flow [2024-06-03 20:50:55,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:50:55,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:50:55,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-03 20:50:55,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5510204081632653 [2024-06-03 20:50:55,271 INFO L175 Difference]: Start difference. First operand has 492 places, 549 transitions, 9772 flow. Second operand 7 states and 162 transitions. [2024-06-03 20:50:55,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 567 transitions, 11267 flow [2024-06-03 20:51:04,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 567 transitions, 10831 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-03 20:51:04,306 INFO L231 Difference]: Finished difference. Result has 489 places, 552 transitions, 9571 flow [2024-06-03 20:51:04,306 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} [2024-06-03 20:51:04,306 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 446 predicate places. [2024-06-03 20:51:04,307 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 552 transitions, 9571 flow [2024-06-03 20:51:04,307 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) [2024-06-03 20:51:04,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:04,307 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, 1, 1] [2024-06-03 20:51:04,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-03 20:51:04,307 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)] === [2024-06-03 20:51:04,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:04,307 INFO L85 PathProgramCache]: Analyzing trace with hash 692040533, now seen corresponding path program 9 times [2024-06-03 20:51:04,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:04,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396142402] [2024-06-03 20:51:04,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:04,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:04,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:04,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:04,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:04,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396142402] [2024-06-03 20:51:04,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396142402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:04,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:04,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:51:04,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352912431] [2024-06-03 20:51:04,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:04,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:51:04,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:04,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:51:04,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:51:04,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:51:04,537 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) [2024-06-03 20:51:04,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:04,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:51:04,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:06,058 INFO L124 PetriNetUnfolderBase]: 3699/6375 cut-off events. [2024-06-03 20:51:06,058 INFO L125 PetriNetUnfolderBase]: For 1305063/1305067 co-relation queries the response was YES. [2024-06-03 20:51:06,131 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. [2024-06-03 20:51:06,151 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 309 selfloop transitions, 253 changer transitions 0/569 dead transitions. [2024-06-03 20:51:06,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 569 transitions, 11033 flow [2024-06-03 20:51:06,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:51:06,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:51:06,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-03 20:51:06,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.544973544973545 [2024-06-03 20:51:06,153 INFO L175 Difference]: Start difference. First operand has 489 places, 552 transitions, 9571 flow. Second operand 9 states and 206 transitions. [2024-06-03 20:51:06,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 569 transitions, 11033 flow [2024-06-03 20:51:15,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 569 transitions, 10847 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-03 20:51:15,192 INFO L231 Difference]: Finished difference. Result has 493 places, 552 transitions, 9897 flow [2024-06-03 20:51:15,192 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} [2024-06-03 20:51:15,193 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 450 predicate places. [2024-06-03 20:51:15,193 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 552 transitions, 9897 flow [2024-06-03 20:51:15,193 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) [2024-06-03 20:51:15,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:15,193 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] [2024-06-03 20:51:15,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-03 20:51:15,193 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)] === [2024-06-03 20:51:15,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:15,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1826321551, now seen corresponding path program 10 times [2024-06-03 20:51:15,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:15,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014123998] [2024-06-03 20:51:15,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:15,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:15,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:15,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:15,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:15,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014123998] [2024-06-03 20:51:15,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014123998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:15,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:15,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:51:15,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249147183] [2024-06-03 20:51:15,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:15,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:51:15,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:15,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:51:15,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:51:15,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:51:15,456 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) [2024-06-03 20:51:15,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:15,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:51:15,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:17,282 INFO L124 PetriNetUnfolderBase]: 3712/6376 cut-off events. [2024-06-03 20:51:17,282 INFO L125 PetriNetUnfolderBase]: For 1337462/1337462 co-relation queries the response was YES. [2024-06-03 20:51:17,462 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. [2024-06-03 20:51:17,486 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 402 selfloop transitions, 168 changer transitions 0/577 dead transitions. [2024-06-03 20:51:17,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 577 transitions, 11773 flow [2024-06-03 20:51:17,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:51:17,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:51:17,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-03 20:51:17,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-03 20:51:17,487 INFO L175 Difference]: Start difference. First operand has 493 places, 552 transitions, 9897 flow. Second operand 10 states and 225 transitions. [2024-06-03 20:51:17,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 577 transitions, 11773 flow [2024-06-03 20:51:25,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 577 transitions, 11316 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-03 20:51:25,582 INFO L231 Difference]: Finished difference. Result has 495 places, 558 transitions, 9874 flow [2024-06-03 20:51:25,583 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} [2024-06-03 20:51:25,583 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 452 predicate places. [2024-06-03 20:51:25,583 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 558 transitions, 9874 flow [2024-06-03 20:51:25,583 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) [2024-06-03 20:51:25,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:25,583 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] [2024-06-03 20:51:25,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-03 20:51:25,583 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)] === [2024-06-03 20:51:25,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:25,583 INFO L85 PathProgramCache]: Analyzing trace with hash -64268625, now seen corresponding path program 11 times [2024-06-03 20:51:25,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:25,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133645881] [2024-06-03 20:51:25,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:25,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:25,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:25,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:25,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:25,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133645881] [2024-06-03 20:51:25,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133645881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:25,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:25,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:51:25,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483105560] [2024-06-03 20:51:25,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:25,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:51:25,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:25,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:51:25,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:51:25,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:51:25,836 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) [2024-06-03 20:51:25,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:25,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:51:25,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:27,640 INFO L124 PetriNetUnfolderBase]: 3717/6385 cut-off events. [2024-06-03 20:51:27,640 INFO L125 PetriNetUnfolderBase]: For 1353511/1353511 co-relation queries the response was YES. [2024-06-03 20:51:27,716 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. [2024-06-03 20:51:27,736 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 309 selfloop transitions, 267 changer transitions 0/583 dead transitions. [2024-06-03 20:51:27,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 583 transitions, 12025 flow [2024-06-03 20:51:27,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:51:27,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:51:27,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 262 transitions. [2024-06-03 20:51:27,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5198412698412699 [2024-06-03 20:51:27,737 INFO L175 Difference]: Start difference. First operand has 495 places, 558 transitions, 9874 flow. Second operand 12 states and 262 transitions. [2024-06-03 20:51:27,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 583 transitions, 12025 flow [2024-06-03 20:51:34,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 583 transitions, 11295 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-03 20:51:34,649 INFO L231 Difference]: Finished difference. Result has 497 places, 561 transitions, 9727 flow [2024-06-03 20:51:34,649 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} [2024-06-03 20:51:34,649 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 454 predicate places. [2024-06-03 20:51:34,649 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 561 transitions, 9727 flow [2024-06-03 20:51:34,650 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) [2024-06-03 20:51:34,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:34,650 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] [2024-06-03 20:51:34,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-03 20:51:34,650 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)] === [2024-06-03 20:51:34,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:34,650 INFO L85 PathProgramCache]: Analyzing trace with hash 564458419, now seen corresponding path program 12 times [2024-06-03 20:51:34,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:34,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98057123] [2024-06-03 20:51:34,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:34,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:34,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:34,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:34,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:34,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98057123] [2024-06-03 20:51:34,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98057123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:34,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:34,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:51:34,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684033431] [2024-06-03 20:51:34,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:34,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:51:34,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:34,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:51:34,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:51:34,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:51:34,903 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) [2024-06-03 20:51:34,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:34,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:51:34,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:36,782 INFO L124 PetriNetUnfolderBase]: 3714/6381 cut-off events. [2024-06-03 20:51:36,782 INFO L125 PetriNetUnfolderBase]: For 1356482/1356482 co-relation queries the response was YES. [2024-06-03 20:51:36,861 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. [2024-06-03 20:51:36,881 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 309 selfloop transitions, 264 changer transitions 0/580 dead transitions. [2024-06-03 20:51:36,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 580 transitions, 11525 flow [2024-06-03 20:51:36,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:51:36,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:51:36,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-03 20:51:36,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-03 20:51:36,882 INFO L175 Difference]: Start difference. First operand has 497 places, 561 transitions, 9727 flow. Second operand 10 states and 225 transitions. [2024-06-03 20:51:36,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 580 transitions, 11525 flow [2024-06-03 20:51:46,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 580 transitions, 10836 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-03 20:51:46,956 INFO L231 Difference]: Finished difference. Result has 498 places, 561 transitions, 9574 flow [2024-06-03 20:51:46,956 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} [2024-06-03 20:51:46,957 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 455 predicate places. [2024-06-03 20:51:46,957 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 561 transitions, 9574 flow [2024-06-03 20:51:46,957 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) [2024-06-03 20:51:46,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:46,957 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] [2024-06-03 20:51:46,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-03 20:51:46,957 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)] === [2024-06-03 20:51:46,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:46,957 INFO L85 PathProgramCache]: Analyzing trace with hash 570887509, now seen corresponding path program 13 times [2024-06-03 20:51:46,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:46,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199452487] [2024-06-03 20:51:46,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:46,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:46,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:47,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:47,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:47,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199452487] [2024-06-03 20:51:47,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199452487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:47,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:47,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:51:47,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366482769] [2024-06-03 20:51:47,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:47,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:51:47,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:47,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:51:47,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:51:47,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:51:47,220 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) [2024-06-03 20:51:47,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:47,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:51:47,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:48,802 INFO L124 PetriNetUnfolderBase]: 3719/6390 cut-off events. [2024-06-03 20:51:48,802 INFO L125 PetriNetUnfolderBase]: For 1370648/1370648 co-relation queries the response was YES. [2024-06-03 20:51:49,074 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. [2024-06-03 20:51:49,094 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 307 selfloop transitions, 270 changer transitions 0/584 dead transitions. [2024-06-03 20:51:49,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 584 transitions, 11736 flow [2024-06-03 20:51:49,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:51:49,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:51:49,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 228 transitions. [2024-06-03 20:51:49,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-06-03 20:51:49,095 INFO L175 Difference]: Start difference. First operand has 498 places, 561 transitions, 9574 flow. Second operand 10 states and 228 transitions. [2024-06-03 20:51:49,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 584 transitions, 11736 flow [2024-06-03 20:51:57,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 584 transitions, 11202 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-03 20:51:57,410 INFO L231 Difference]: Finished difference. Result has 499 places, 564 transitions, 9633 flow [2024-06-03 20:51:57,410 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} [2024-06-03 20:51:57,410 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 456 predicate places. [2024-06-03 20:51:57,410 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 564 transitions, 9633 flow [2024-06-03 20:51:57,411 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) [2024-06-03 20:51:57,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:57,411 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] [2024-06-03 20:51:57,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-03 20:51:57,411 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)] === [2024-06-03 20:51:57,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:57,411 INFO L85 PathProgramCache]: Analyzing trace with hash 571273459, now seen corresponding path program 14 times [2024-06-03 20:51:57,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:57,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386534265] [2024-06-03 20:51:57,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:57,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:57,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:57,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:57,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:57,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386534265] [2024-06-03 20:51:57,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386534265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:57,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:57,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:51:57,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302891162] [2024-06-03 20:51:57,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:57,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:51:57,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:57,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:51:57,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:51:57,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:51:57,678 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) [2024-06-03 20:51:57,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:57,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:51:57,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:59,420 INFO L124 PetriNetUnfolderBase]: 3716/6386 cut-off events. [2024-06-03 20:51:59,420 INFO L125 PetriNetUnfolderBase]: For 1376083/1376083 co-relation queries the response was YES. [2024-06-03 20:51:59,499 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. [2024-06-03 20:51:59,521 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 299 selfloop transitions, 277 changer transitions 0/583 dead transitions. [2024-06-03 20:51:59,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 583 transitions, 11445 flow [2024-06-03 20:51:59,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:51:59,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:51:59,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 228 transitions. [2024-06-03 20:51:59,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-06-03 20:51:59,522 INFO L175 Difference]: Start difference. First operand has 499 places, 564 transitions, 9633 flow. Second operand 10 states and 228 transitions. [2024-06-03 20:51:59,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 583 transitions, 11445 flow [2024-06-03 20:52:07,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 583 transitions, 10825 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-03 20:52:08,004 INFO L231 Difference]: Finished difference. Result has 501 places, 564 transitions, 9573 flow [2024-06-03 20:52:08,005 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} [2024-06-03 20:52:08,005 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 458 predicate places. [2024-06-03 20:52:08,005 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 564 transitions, 9573 flow [2024-06-03 20:52:08,005 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) [2024-06-03 20:52:08,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:08,005 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] [2024-06-03 20:52:08,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-03 20:52:08,005 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)] === [2024-06-03 20:52:08,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:08,006 INFO L85 PathProgramCache]: Analyzing trace with hash 576428449, now seen corresponding path program 15 times [2024-06-03 20:52:08,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:08,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397243114] [2024-06-03 20:52:08,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:08,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:08,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:08,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:08,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:08,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397243114] [2024-06-03 20:52:08,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397243114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:08,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:08,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:52:08,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776598924] [2024-06-03 20:52:08,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:08,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:52:08,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:08,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:52:08,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:52:08,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:52:08,269 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) [2024-06-03 20:52:08,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:08,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:52:08,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:10,022 INFO L124 PetriNetUnfolderBase]: 3713/6382 cut-off events. [2024-06-03 20:52:10,022 INFO L125 PetriNetUnfolderBase]: For 1380711/1380711 co-relation queries the response was YES. [2024-06-03 20:52:10,100 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. [2024-06-03 20:52:10,122 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 303 selfloop transitions, 272 changer transitions 0/582 dead transitions. [2024-06-03 20:52:10,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 582 transitions, 11075 flow [2024-06-03 20:52:10,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:52:10,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:52:10,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 224 transitions. [2024-06-03 20:52:10,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-03 20:52:10,123 INFO L175 Difference]: Start difference. First operand has 501 places, 564 transitions, 9573 flow. Second operand 10 states and 224 transitions. [2024-06-03 20:52:10,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 582 transitions, 11075 flow [2024-06-03 20:52:20,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 582 transitions, 10573 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-03 20:52:20,423 INFO L231 Difference]: Finished difference. Result has 502 places, 564 transitions, 9621 flow [2024-06-03 20:52:20,423 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} [2024-06-03 20:52:20,423 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 459 predicate places. [2024-06-03 20:52:20,424 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 564 transitions, 9621 flow [2024-06-03 20:52:20,424 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) [2024-06-03 20:52:20,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:20,424 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] [2024-06-03 20:52:20,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-03 20:52:20,424 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)] === [2024-06-03 20:52:20,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:20,424 INFO L85 PathProgramCache]: Analyzing trace with hash 153846099, now seen corresponding path program 16 times [2024-06-03 20:52:20,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:20,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463753585] [2024-06-03 20:52:20,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:20,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:20,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:20,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:20,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:20,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463753585] [2024-06-03 20:52:20,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463753585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:20,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:20,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:52:20,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872746695] [2024-06-03 20:52:20,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:20,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:52:20,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:20,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:52:20,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:52:20,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:52:20,673 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) [2024-06-03 20:52:20,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:20,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:52:20,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:22,233 INFO L124 PetriNetUnfolderBase]: 3726/6424 cut-off events. [2024-06-03 20:52:22,233 INFO L125 PetriNetUnfolderBase]: For 1410588/1410588 co-relation queries the response was YES. [2024-06-03 20:52:22,312 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. [2024-06-03 20:52:22,526 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 437 selfloop transitions, 143 changer transitions 0/587 dead transitions. [2024-06-03 20:52:22,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 587 transitions, 11547 flow [2024-06-03 20:52:22,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:52:22,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:52:22,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-03 20:52:22,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-06-03 20:52:22,527 INFO L175 Difference]: Start difference. First operand has 502 places, 564 transitions, 9621 flow. Second operand 8 states and 186 transitions. [2024-06-03 20:52:22,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 587 transitions, 11547 flow [2024-06-03 20:52:32,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 587 transitions, 10957 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-03 20:52:32,127 INFO L231 Difference]: Finished difference. Result has 500 places, 570 transitions, 9425 flow [2024-06-03 20:52:32,128 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} [2024-06-03 20:52:32,128 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 457 predicate places. [2024-06-03 20:52:32,128 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 570 transitions, 9425 flow [2024-06-03 20:52:32,128 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) [2024-06-03 20:52:32,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:32,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:32,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-03 20:52:32,129 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)] === [2024-06-03 20:52:32,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:32,129 INFO L85 PathProgramCache]: Analyzing trace with hash -74088237, now seen corresponding path program 17 times [2024-06-03 20:52:32,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:32,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294172043] [2024-06-03 20:52:32,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:32,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:32,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:32,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:32,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:32,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294172043] [2024-06-03 20:52:32,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294172043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:32,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:32,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:52:32,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875576333] [2024-06-03 20:52:32,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:32,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:52:32,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:32,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:52:32,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:52:32,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:52:32,380 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) [2024-06-03 20:52:32,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:32,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:52:32,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:33,949 INFO L124 PetriNetUnfolderBase]: 3731/6433 cut-off events. [2024-06-03 20:52:33,949 INFO L125 PetriNetUnfolderBase]: For 1425877/1425877 co-relation queries the response was YES. [2024-06-03 20:52:34,027 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. [2024-06-03 20:52:34,046 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 440 selfloop transitions, 143 changer transitions 0/590 dead transitions. [2024-06-03 20:52:34,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 590 transitions, 10991 flow [2024-06-03 20:52:34,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:52:34,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:52:34,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-03 20:52:34,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5343915343915344 [2024-06-03 20:52:34,047 INFO L175 Difference]: Start difference. First operand has 500 places, 570 transitions, 9425 flow. Second operand 9 states and 202 transitions. [2024-06-03 20:52:34,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 590 transitions, 10991 flow [2024-06-03 20:52:43,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 590 transitions, 10748 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-03 20:52:43,708 INFO L231 Difference]: Finished difference. Result has 505 places, 573 transitions, 9520 flow [2024-06-03 20:52:43,708 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} [2024-06-03 20:52:43,709 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 462 predicate places. [2024-06-03 20:52:43,709 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 573 transitions, 9520 flow [2024-06-03 20:52:43,709 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) [2024-06-03 20:52:43,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:43,709 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, 1] [2024-06-03 20:52:43,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-03 20:52:43,709 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)] === [2024-06-03 20:52:43,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:43,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1923338877, now seen corresponding path program 18 times [2024-06-03 20:52:43,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:43,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700921554] [2024-06-03 20:52:43,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:43,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:43,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:43,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:43,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:43,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700921554] [2024-06-03 20:52:43,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700921554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:43,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:43,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:52:43,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206397792] [2024-06-03 20:52:43,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:43,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:52:43,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:43,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:52:43,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:52:43,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:52:43,961 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) [2024-06-03 20:52:43,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:43,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:52:43,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:45,565 INFO L124 PetriNetUnfolderBase]: 3736/6442 cut-off events. [2024-06-03 20:52:45,565 INFO L125 PetriNetUnfolderBase]: For 1443746/1443746 co-relation queries the response was YES. [2024-06-03 20:52:45,646 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. [2024-06-03 20:52:45,668 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 445 selfloop transitions, 143 changer transitions 0/595 dead transitions. [2024-06-03 20:52:45,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 595 transitions, 11107 flow [2024-06-03 20:52:45,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:52:45,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:52:45,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-03 20:52:45,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-03 20:52:45,669 INFO L175 Difference]: Start difference. First operand has 505 places, 573 transitions, 9520 flow. Second operand 8 states and 188 transitions. [2024-06-03 20:52:45,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 595 transitions, 11107 flow [2024-06-03 20:52:55,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 595 transitions, 10816 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-03 20:52:55,834 INFO L231 Difference]: Finished difference. Result has 507 places, 576 transitions, 9570 flow [2024-06-03 20:52:55,834 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} [2024-06-03 20:52:55,834 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 464 predicate places. [2024-06-03 20:52:55,834 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 576 transitions, 9570 flow [2024-06-03 20:52:55,834 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) [2024-06-03 20:52:55,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:55,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:55,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-03 20:52:55,834 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)] === [2024-06-03 20:52:55,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:55,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1928879817, now seen corresponding path program 19 times [2024-06-03 20:52:55,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:55,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264109457] [2024-06-03 20:52:55,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:55,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:55,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:56,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:56,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:56,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264109457] [2024-06-03 20:52:56,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264109457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:56,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:56,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:52:56,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022486963] [2024-06-03 20:52:56,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:56,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:52:56,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:56,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:52:56,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:52:56,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:52:56,075 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) [2024-06-03 20:52:56,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:56,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:52:56,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:57,649 INFO L124 PetriNetUnfolderBase]: 3741/6451 cut-off events. [2024-06-03 20:52:57,649 INFO L125 PetriNetUnfolderBase]: For 1461222/1461222 co-relation queries the response was YES. [2024-06-03 20:52:57,728 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. [2024-06-03 20:52:57,749 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 444 selfloop transitions, 150 changer transitions 0/601 dead transitions. [2024-06-03 20:52:57,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 601 transitions, 11507 flow [2024-06-03 20:52:57,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:52:57,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:52:57,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-03 20:52:57,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5918367346938775 [2024-06-03 20:52:57,750 INFO L175 Difference]: Start difference. First operand has 507 places, 576 transitions, 9570 flow. Second operand 7 states and 174 transitions. [2024-06-03 20:52:57,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 513 places, 601 transitions, 11507 flow [2024-06-03 20:53:07,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 601 transitions, 11307 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-03 20:53:07,820 INFO L231 Difference]: Finished difference. Result has 509 places, 579 transitions, 9738 flow [2024-06-03 20:53:07,821 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} [2024-06-03 20:53:07,821 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 466 predicate places. [2024-06-03 20:53:07,821 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 579 transitions, 9738 flow [2024-06-03 20:53:07,821 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) [2024-06-03 20:53:07,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:07,822 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] [2024-06-03 20:53:07,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-03 20:53:07,822 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)] === [2024-06-03 20:53:07,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:07,822 INFO L85 PathProgramCache]: Analyzing trace with hash -273182637, now seen corresponding path program 20 times [2024-06-03 20:53:07,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:07,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657138911] [2024-06-03 20:53:07,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:07,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:07,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:08,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:08,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:08,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657138911] [2024-06-03 20:53:08,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657138911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:08,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:08,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:53:08,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261986729] [2024-06-03 20:53:08,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:08,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:53:08,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:08,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:53:08,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:53:08,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:53:08,065 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) [2024-06-03 20:53:08,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:08,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:53:08,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:09,678 INFO L124 PetriNetUnfolderBase]: 3738/6447 cut-off events. [2024-06-03 20:53:09,678 INFO L125 PetriNetUnfolderBase]: For 1468238/1468238 co-relation queries the response was YES. [2024-06-03 20:53:09,757 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. [2024-06-03 20:53:09,776 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 440 selfloop transitions, 151 changer transitions 0/598 dead transitions. [2024-06-03 20:53:09,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 598 transitions, 11606 flow [2024-06-03 20:53:09,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:53:09,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:53:09,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-03 20:53:09,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5816326530612245 [2024-06-03 20:53:09,777 INFO L175 Difference]: Start difference. First operand has 509 places, 579 transitions, 9738 flow. Second operand 7 states and 171 transitions. [2024-06-03 20:53:09,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 598 transitions, 11606 flow [2024-06-03 20:53:21,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 598 transitions, 11379 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-03 20:53:21,040 INFO L231 Difference]: Finished difference. Result has 512 places, 579 transitions, 9819 flow [2024-06-03 20:53:21,040 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} [2024-06-03 20:53:21,041 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 469 predicate places. [2024-06-03 20:53:21,041 INFO L495 AbstractCegarLoop]: Abstraction has has 512 places, 579 transitions, 9819 flow [2024-06-03 20:53:21,041 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) [2024-06-03 20:53:21,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:21,041 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] [2024-06-03 20:53:21,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-03 20:53:21,041 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)] === [2024-06-03 20:53:21,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:21,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1935308907, now seen corresponding path program 21 times [2024-06-03 20:53:21,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:21,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194620453] [2024-06-03 20:53:21,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:21,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:21,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:21,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:21,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:21,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194620453] [2024-06-03 20:53:21,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194620453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:21,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:21,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:53:21,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101115498] [2024-06-03 20:53:21,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:21,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:53:21,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:21,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:53:21,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:53:21,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:53:21,322 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) [2024-06-03 20:53:21,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:21,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:53:21,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:22,937 INFO L124 PetriNetUnfolderBase]: 3735/6443 cut-off events. [2024-06-03 20:53:22,937 INFO L125 PetriNetUnfolderBase]: For 1474676/1474676 co-relation queries the response was YES. [2024-06-03 20:53:23,017 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. [2024-06-03 20:53:23,038 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 450 selfloop transitions, 147 changer transitions 0/604 dead transitions. [2024-06-03 20:53:23,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 604 transitions, 11397 flow [2024-06-03 20:53:23,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:53:23,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:53:23,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-03 20:53:23,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-03 20:53:23,045 INFO L175 Difference]: Start difference. First operand has 512 places, 579 transitions, 9819 flow. Second operand 8 states and 196 transitions. [2024-06-03 20:53:23,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 604 transitions, 11397 flow [2024-06-03 20:53:34,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 604 transitions, 10663 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-03 20:53:34,313 INFO L231 Difference]: Finished difference. Result has 511 places, 579 transitions, 9387 flow [2024-06-03 20:53:34,313 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} [2024-06-03 20:53:34,313 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 468 predicate places. [2024-06-03 20:53:34,313 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 579 transitions, 9387 flow [2024-06-03 20:53:34,313 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) [2024-06-03 20:53:34,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:34,314 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] [2024-06-03 20:53:34,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-03 20:53:34,314 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)] === [2024-06-03 20:53:34,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:34,314 INFO L85 PathProgramCache]: Analyzing trace with hash -223611281, now seen corresponding path program 22 times [2024-06-03 20:53:34,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:34,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693405339] [2024-06-03 20:53:34,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:34,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:34,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:34,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:34,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:34,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693405339] [2024-06-03 20:53:34,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693405339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:34,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:34,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:53:34,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555375896] [2024-06-03 20:53:34,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:34,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:53:34,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:34,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:53:34,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:53:34,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:53:34,561 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) [2024-06-03 20:53:34,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:34,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:53:34,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:36,177 INFO L124 PetriNetUnfolderBase]: 3732/6439 cut-off events. [2024-06-03 20:53:36,177 INFO L125 PetriNetUnfolderBase]: For 1471769/1471769 co-relation queries the response was YES. [2024-06-03 20:53:36,257 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. [2024-06-03 20:53:36,277 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 448 selfloop transitions, 150 changer transitions 0/605 dead transitions. [2024-06-03 20:53:36,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 605 transitions, 10647 flow [2024-06-03 20:53:36,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:53:36,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:53:36,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 231 transitions. [2024-06-03 20:53:36,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-03 20:53:36,278 INFO L175 Difference]: Start difference. First operand has 511 places, 579 transitions, 9387 flow. Second operand 10 states and 231 transitions. [2024-06-03 20:53:36,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 605 transitions, 10647 flow [2024-06-03 20:53:46,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 605 transitions, 10291 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 20:53:46,973 INFO L231 Difference]: Finished difference. Result has 514 places, 579 transitions, 9337 flow [2024-06-03 20:53:46,973 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} [2024-06-03 20:53:46,973 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 471 predicate places. [2024-06-03 20:53:46,974 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 579 transitions, 9337 flow [2024-06-03 20:53:46,974 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) [2024-06-03 20:53:46,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:46,974 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] [2024-06-03 20:53:46,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-03 20:53:46,974 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)] === [2024-06-03 20:53:46,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:46,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1406324778, now seen corresponding path program 9 times [2024-06-03 20:53:46,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:46,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484407714] [2024-06-03 20:53:46,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:46,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:46,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:47,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:47,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:47,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484407714] [2024-06-03 20:53:47,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484407714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:47,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:47,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:53:47,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012033182] [2024-06-03 20:53:47,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:47,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:53:47,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:47,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:53:47,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:53:47,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:53:47,224 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) [2024-06-03 20:53:47,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:47,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:53:47,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:48,913 INFO L124 PetriNetUnfolderBase]: 3786/6496 cut-off events. [2024-06-03 20:53:48,913 INFO L125 PetriNetUnfolderBase]: For 1620797/1620797 co-relation queries the response was YES. [2024-06-03 20:53:48,994 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. [2024-06-03 20:53:49,015 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 312 selfloop transitions, 298 changer transitions 0/617 dead transitions. [2024-06-03 20:53:49,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 617 transitions, 11179 flow [2024-06-03 20:53:49,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:53:49,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:53:49,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 270 transitions. [2024-06-03 20:53:49,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-03 20:53:49,016 INFO L175 Difference]: Start difference. First operand has 514 places, 579 transitions, 9337 flow. Second operand 12 states and 270 transitions. [2024-06-03 20:53:49,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 617 transitions, 11179 flow [2024-06-03 20:54:01,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 617 transitions, 10689 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-03 20:54:01,414 INFO L231 Difference]: Finished difference. Result has 514 places, 583 transitions, 9648 flow [2024-06-03 20:54:01,414 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} [2024-06-03 20:54:01,414 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 471 predicate places. [2024-06-03 20:54:01,414 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 583 transitions, 9648 flow [2024-06-03 20:54:01,414 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) [2024-06-03 20:54:01,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:54:01,414 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] [2024-06-03 20:54:01,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-03 20:54:01,415 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)] === [2024-06-03 20:54:01,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:54:01,415 INFO L85 PathProgramCache]: Analyzing trace with hash -19416826, now seen corresponding path program 10 times [2024-06-03 20:54:01,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:54:01,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134403526] [2024-06-03 20:54:01,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:54:01,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:54:01,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:54:01,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:54:01,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:54:01,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134403526] [2024-06-03 20:54:01,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134403526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:54:01,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:54:01,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:54:01,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240981705] [2024-06-03 20:54:01,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:54:01,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:54:01,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:54:01,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:54:01,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:54:01,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:54:01,671 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) [2024-06-03 20:54:01,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:54:01,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:54:01,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:54:03,712 INFO L124 PetriNetUnfolderBase]: 3794/6513 cut-off events. [2024-06-03 20:54:03,713 INFO L125 PetriNetUnfolderBase]: For 1640184/1640184 co-relation queries the response was YES. [2024-06-03 20:54:03,801 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. [2024-06-03 20:54:03,821 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 310 selfloop transitions, 294 changer transitions 0/611 dead transitions. [2024-06-03 20:54:03,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 611 transitions, 11020 flow [2024-06-03 20:54:03,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:54:03,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:54:03,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 262 transitions. [2024-06-03 20:54:03,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5198412698412699 [2024-06-03 20:54:03,822 INFO L175 Difference]: Start difference. First operand has 514 places, 583 transitions, 9648 flow. Second operand 12 states and 262 transitions. [2024-06-03 20:54:03,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 611 transitions, 11020 flow [2024-06-03 20:54:15,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 516 places, 611 transitions, 10288 flow, removed 74 selfloop flow, removed 9 redundant places. [2024-06-03 20:54:15,764 INFO L231 Difference]: Finished difference. Result has 517 places, 585 transitions, 9615 flow [2024-06-03 20:54:15,764 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} [2024-06-03 20:54:15,765 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 474 predicate places. [2024-06-03 20:54:15,765 INFO L495 AbstractCegarLoop]: Abstraction has has 517 places, 585 transitions, 9615 flow [2024-06-03 20:54:15,765 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) [2024-06-03 20:54:15,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:54:15,765 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] [2024-06-03 20:54:15,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-03 20:54:15,765 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)] === [2024-06-03 20:54:15,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:54:15,765 INFO L85 PathProgramCache]: Analyzing trace with hash 79286230, now seen corresponding path program 11 times [2024-06-03 20:54:15,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:54:15,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15013874] [2024-06-03 20:54:15,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:54:15,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:54:15,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:54:15,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:54:15,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:54:15,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15013874] [2024-06-03 20:54:15,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15013874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:54:15,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:54:15,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:54:15,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443846904] [2024-06-03 20:54:15,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:54:15,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:54:15,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:54:15,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:54:15,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:54:16,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:54:16,022 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) [2024-06-03 20:54:16,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:54:16,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:54:16,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:54:17,841 INFO L124 PetriNetUnfolderBase]: 3802/6525 cut-off events. [2024-06-03 20:54:17,841 INFO L125 PetriNetUnfolderBase]: For 1654508/1654508 co-relation queries the response was YES. [2024-06-03 20:54:17,923 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. [2024-06-03 20:54:17,943 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 311 selfloop transitions, 291 changer transitions 0/609 dead transitions. [2024-06-03 20:54:17,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 609 transitions, 10951 flow [2024-06-03 20:54:17,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:54:17,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:54:17,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 243 transitions. [2024-06-03 20:54:17,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525974025974026 [2024-06-03 20:54:17,944 INFO L175 Difference]: Start difference. First operand has 517 places, 585 transitions, 9615 flow. Second operand 11 states and 243 transitions. [2024-06-03 20:54:17,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 609 transitions, 10951 flow [2024-06-03 20:54:29,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 609 transitions, 10298 flow, removed 34 selfloop flow, removed 10 redundant places. [2024-06-03 20:54:29,132 INFO L231 Difference]: Finished difference. Result has 518 places, 587 transitions, 9633 flow [2024-06-03 20:54:29,132 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} [2024-06-03 20:54:29,132 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 475 predicate places. [2024-06-03 20:54:29,133 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 587 transitions, 9633 flow [2024-06-03 20:54:29,133 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) [2024-06-03 20:54:29,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:54:29,133 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] [2024-06-03 20:54:29,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-03 20:54:29,133 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)] === [2024-06-03 20:54:29,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:54:29,134 INFO L85 PathProgramCache]: Analyzing trace with hash 214087638, now seen corresponding path program 12 times [2024-06-03 20:54:29,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:54:29,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198476188] [2024-06-03 20:54:29,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:54:29,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:54:29,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:54:29,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:54:29,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:54:29,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198476188] [2024-06-03 20:54:29,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198476188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:54:29,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:54:29,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:54:29,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187687515] [2024-06-03 20:54:29,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:54:29,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:54:29,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:54:29,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:54:29,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:54:29,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:54:29,395 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) [2024-06-03 20:54:29,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:54:29,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:54:29,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:54:31,259 INFO L124 PetriNetUnfolderBase]: 3838/6581 cut-off events. [2024-06-03 20:54:31,259 INFO L125 PetriNetUnfolderBase]: For 1791933/1791933 co-relation queries the response was YES. [2024-06-03 20:54:31,344 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. [2024-06-03 20:54:31,365 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 321 selfloop transitions, 282 changer transitions 0/610 dead transitions. [2024-06-03 20:54:31,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 610 transitions, 10991 flow [2024-06-03 20:54:31,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:54:31,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:54:31,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 226 transitions. [2024-06-03 20:54:31,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5380952380952381 [2024-06-03 20:54:31,367 INFO L175 Difference]: Start difference. First operand has 518 places, 587 transitions, 9633 flow. Second operand 10 states and 226 transitions. [2024-06-03 20:54:31,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 610 transitions, 10991 flow [2024-06-03 20:54:43,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 610 transitions, 10340 flow, removed 36 selfloop flow, removed 9 redundant places. [2024-06-03 20:54:43,929 INFO L231 Difference]: Finished difference. Result has 519 places, 589 transitions, 9640 flow [2024-06-03 20:54:43,929 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} [2024-06-03 20:54:43,930 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 476 predicate places. [2024-06-03 20:54:43,930 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 589 transitions, 9640 flow [2024-06-03 20:54:43,930 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) [2024-06-03 20:54:43,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:54:43,930 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] [2024-06-03 20:54:43,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-03 20:54:43,930 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)] === [2024-06-03 20:54:43,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:54:43,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1526065110, now seen corresponding path program 13 times [2024-06-03 20:54:43,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:54:43,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989336856] [2024-06-03 20:54:43,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:54:43,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:54:43,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:54:44,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:54:44,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:54:44,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989336856] [2024-06-03 20:54:44,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989336856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:54:44,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:54:44,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:54:44,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005995644] [2024-06-03 20:54:44,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:54:44,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:54:44,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:54:44,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:54:44,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:54:44,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:54:44,221 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) [2024-06-03 20:54:44,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:54:44,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:54:44,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:54:45,954 INFO L124 PetriNetUnfolderBase]: 3815/6563 cut-off events. [2024-06-03 20:54:45,954 INFO L125 PetriNetUnfolderBase]: For 1670477/1670477 co-relation queries the response was YES. [2024-06-03 20:54:46,037 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. [2024-06-03 20:54:46,059 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 464 selfloop transitions, 149 changer transitions 0/620 dead transitions. [2024-06-03 20:54:46,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 620 transitions, 10962 flow [2024-06-03 20:54:46,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:54:46,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:54:46,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-03 20:54:46,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6011904761904762 [2024-06-03 20:54:46,059 INFO L175 Difference]: Start difference. First operand has 519 places, 589 transitions, 9640 flow. Second operand 8 states and 202 transitions. [2024-06-03 20:54:46,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 620 transitions, 10962 flow [2024-06-03 20:54:55,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 620 transitions, 10272 flow, removed 65 selfloop flow, removed 8 redundant places. [2024-06-03 20:54:55,221 INFO L231 Difference]: Finished difference. Result has 519 places, 589 transitions, 9257 flow [2024-06-03 20:54:55,221 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} [2024-06-03 20:54:55,221 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 476 predicate places. [2024-06-03 20:54:55,222 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 589 transitions, 9257 flow [2024-06-03 20:54:55,222 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) [2024-06-03 20:54:55,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:54:55,222 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] [2024-06-03 20:54:55,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-03 20:54:55,222 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)] === [2024-06-03 20:54:55,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:54:55,223 INFO L85 PathProgramCache]: Analyzing trace with hash 614372131, now seen corresponding path program 1 times [2024-06-03 20:54:55,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:54:55,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484794732] [2024-06-03 20:54:55,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:54:55,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:54:55,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:54:55,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:54:55,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:54:55,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484794732] [2024-06-03 20:54:55,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484794732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:54:55,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:54:55,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:54:55,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914431790] [2024-06-03 20:54:55,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:54:55,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:54:55,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:54:55,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:54:55,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:54:55,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:54:55,523 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) [2024-06-03 20:54:55,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:54:55,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:54:55,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:54:57,270 INFO L124 PetriNetUnfolderBase]: 3835/6599 cut-off events. [2024-06-03 20:54:57,270 INFO L125 PetriNetUnfolderBase]: For 1615678/1615678 co-relation queries the response was YES. [2024-06-03 20:54:57,561 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. [2024-06-03 20:54:57,588 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 489 selfloop transitions, 120 changer transitions 0/616 dead transitions. [2024-06-03 20:54:57,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 616 transitions, 10587 flow [2024-06-03 20:54:57,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:54:57,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:54:57,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 261 transitions. [2024-06-03 20:54:57,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5178571428571429 [2024-06-03 20:54:57,589 INFO L175 Difference]: Start difference. First operand has 519 places, 589 transitions, 9257 flow. Second operand 12 states and 261 transitions. [2024-06-03 20:54:57,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 616 transitions, 10587 flow [2024-06-03 20:55:09,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 616 transitions, 10267 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-03 20:55:09,391 INFO L231 Difference]: Finished difference. Result has 524 places, 590 transitions, 9211 flow [2024-06-03 20:55:09,391 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} [2024-06-03 20:55:09,391 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 481 predicate places. [2024-06-03 20:55:09,391 INFO L495 AbstractCegarLoop]: Abstraction has has 524 places, 590 transitions, 9211 flow [2024-06-03 20:55:09,391 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) [2024-06-03 20:55:09,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:55:09,392 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] [2024-06-03 20:55:09,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-03 20:55:09,392 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)] === [2024-06-03 20:55:09,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:55:09,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1084938913, now seen corresponding path program 2 times [2024-06-03 20:55:09,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:55:09,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214926684] [2024-06-03 20:55:09,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:55:09,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:55:09,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:55:09,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:55:09,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:55:09,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214926684] [2024-06-03 20:55:09,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214926684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:55:09,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:55:09,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:55:09,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297048913] [2024-06-03 20:55:09,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:55:09,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:55:09,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:55:09,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:55:09,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:55:09,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:55:09,686 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) [2024-06-03 20:55:09,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:55:09,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:55:09,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:55:11,616 INFO L124 PetriNetUnfolderBase]: 3855/6643 cut-off events. [2024-06-03 20:55:11,616 INFO L125 PetriNetUnfolderBase]: For 1633281/1633281 co-relation queries the response was YES. [2024-06-03 20:55:11,703 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. [2024-06-03 20:55:11,725 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 486 selfloop transitions, 128 changer transitions 0/621 dead transitions. [2024-06-03 20:55:11,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 534 places, 621 transitions, 10917 flow [2024-06-03 20:55:11,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:55:11,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:55:11,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 247 transitions. [2024-06-03 20:55:11,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5346320346320347 [2024-06-03 20:55:11,726 INFO L175 Difference]: Start difference. First operand has 524 places, 590 transitions, 9211 flow. Second operand 11 states and 247 transitions. [2024-06-03 20:55:11,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 534 places, 621 transitions, 10917 flow [2024-06-03 20:55:23,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 621 transitions, 10653 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-03 20:55:23,077 INFO L231 Difference]: Finished difference. Result has 525 places, 591 transitions, 9237 flow [2024-06-03 20:55:23,078 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} [2024-06-03 20:55:23,078 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 482 predicate places. [2024-06-03 20:55:23,078 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 591 transitions, 9237 flow [2024-06-03 20:55:23,078 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) [2024-06-03 20:55:23,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:55:23,078 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] [2024-06-03 20:55:23,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-03 20:55:23,078 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)] === [2024-06-03 20:55:23,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:55:23,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1085205823, now seen corresponding path program 3 times [2024-06-03 20:55:23,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:55:23,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885876234] [2024-06-03 20:55:23,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:55:23,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:55:23,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:55:23,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:55:23,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:55:23,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885876234] [2024-06-03 20:55:23,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885876234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:55:23,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:55:23,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:55:23,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428697806] [2024-06-03 20:55:23,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:55:23,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:55:23,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:55:23,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:55:23,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:55:23,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:55:23,405 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) [2024-06-03 20:55:23,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:55:23,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:55:23,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:55:25,221 INFO L124 PetriNetUnfolderBase]: 3842/6624 cut-off events. [2024-06-03 20:55:25,221 INFO L125 PetriNetUnfolderBase]: For 1564947/1564947 co-relation queries the response was YES. [2024-06-03 20:55:25,309 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. [2024-06-03 20:55:25,330 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 488 selfloop transitions, 124 changer transitions 0/619 dead transitions. [2024-06-03 20:55:25,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 619 transitions, 10557 flow [2024-06-03 20:55:25,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:55:25,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:55:25,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 244 transitions. [2024-06-03 20:55:25,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5281385281385281 [2024-06-03 20:55:25,331 INFO L175 Difference]: Start difference. First operand has 525 places, 591 transitions, 9237 flow. Second operand 11 states and 244 transitions. [2024-06-03 20:55:25,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 619 transitions, 10557 flow [2024-06-03 20:55:37,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 619 transitions, 10264 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-03 20:55:37,228 INFO L231 Difference]: Finished difference. Result has 528 places, 591 transitions, 9196 flow [2024-06-03 20:55:37,229 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} [2024-06-03 20:55:37,229 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 485 predicate places. [2024-06-03 20:55:37,229 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 591 transitions, 9196 flow [2024-06-03 20:55:37,229 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) [2024-06-03 20:55:37,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:55:37,230 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] [2024-06-03 20:55:37,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-03 20:55:37,230 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)] === [2024-06-03 20:55:37,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:55:37,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1308080949, now seen corresponding path program 4 times [2024-06-03 20:55:37,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:55:37,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648152937] [2024-06-03 20:55:37,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:55:37,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:55:37,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:55:37,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:55:37,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:55:37,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648152937] [2024-06-03 20:55:37,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648152937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:55:37,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:55:37,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:55:37,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602586229] [2024-06-03 20:55:37,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:55:37,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:55:37,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:55:37,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:55:37,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:55:37,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:55:37,513 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) [2024-06-03 20:55:37,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:55:37,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:55:37,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:55:39,642 INFO L124 PetriNetUnfolderBase]: 3829/6613 cut-off events. [2024-06-03 20:55:39,642 INFO L125 PetriNetUnfolderBase]: For 1492663/1492663 co-relation queries the response was YES. [2024-06-03 20:55:39,728 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. [2024-06-03 20:55:39,747 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 505 selfloop transitions, 120 changer transitions 1/633 dead transitions. [2024-06-03 20:55:39,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 633 transitions, 10623 flow [2024-06-03 20:55:39,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:55:39,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:55:39,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-03 20:55:39,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6279761904761905 [2024-06-03 20:55:39,748 INFO L175 Difference]: Start difference. First operand has 528 places, 591 transitions, 9196 flow. Second operand 8 states and 211 transitions. [2024-06-03 20:55:39,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 633 transitions, 10623 flow [2024-06-03 20:55:48,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 633 transitions, 10336 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-03 20:55:48,177 INFO L231 Difference]: Finished difference. Result has 526 places, 592 transitions, 9192 flow [2024-06-03 20:55:48,177 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} [2024-06-03 20:55:48,178 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 483 predicate places. [2024-06-03 20:55:48,178 INFO L495 AbstractCegarLoop]: Abstraction has has 526 places, 592 transitions, 9192 flow [2024-06-03 20:55:48,178 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) [2024-06-03 20:55:48,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:55:48,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:55:48,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-03 20:55:48,179 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)] === [2024-06-03 20:55:48,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:55:48,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1244611325, now seen corresponding path program 5 times [2024-06-03 20:55:48,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:55:48,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093417366] [2024-06-03 20:55:48,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:55:48,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:55:48,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:55:48,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:55:48,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:55:48,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093417366] [2024-06-03 20:55:48,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093417366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:55:48,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:55:48,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:55:48,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90102528] [2024-06-03 20:55:48,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:55:48,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:55:48,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:55:48,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:55:48,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:55:48,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:55:48,495 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) [2024-06-03 20:55:48,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:55:48,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:55:48,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:55:50,360 INFO L124 PetriNetUnfolderBase]: 3849/6660 cut-off events. [2024-06-03 20:55:50,361 INFO L125 PetriNetUnfolderBase]: For 1510729/1510729 co-relation queries the response was YES. Killed by 15