./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe021_power.opt_pso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe021_power.opt_pso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe021_power.opt_pso.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe021_power.opt_pso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 22:02:03,072 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 22:02:03,113 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 22:02:03,116 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 22:02:03,117 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 22:02:03,136 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 22:02:03,136 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 22:02:03,137 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 22:02:03,137 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 22:02:03,137 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 22:02:03,138 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 22:02:03,138 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 22:02:03,138 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 22:02:03,138 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 22:02:03,139 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 22:02:03,139 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 22:02:03,139 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 22:02:03,139 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 22:02:03,140 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 22:02:03,140 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 22:02:03,140 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 22:02:03,143 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 22:02:03,143 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 22:02:03,143 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 22:02:03,144 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 22:02:03,144 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 22:02:03,144 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 22:02:03,144 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 22:02:03,144 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 22:02:03,145 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 22:02:03,145 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 22:02:03,145 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 22:02:03,145 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 22:02:03,145 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 22:02:03,146 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 22:02:03,146 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 22:02:03,146 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 22:02:03,146 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 22:02:03,146 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 22:02:03,147 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 22:02:03,147 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 22:02:03,150 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 22:02:03,150 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 22:02:03,151 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 22:02:03,373 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 22:02:03,391 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 22:02:03,393 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 22:02:03,394 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 22:02:03,395 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 22:02:03,396 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe021_power.opt_pso.opt.i [2024-06-21 22:02:04,483 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 22:02:04,718 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 22:02:04,723 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe021_power.opt_pso.opt.i [2024-06-21 22:02:04,742 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c94a9b9f/c71ce905719241a79946825947408ea6/FLAG4ae828bf6 [2024-06-21 22:02:04,753 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c94a9b9f/c71ce905719241a79946825947408ea6 [2024-06-21 22:02:04,755 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 22:02:04,756 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 22:02:04,757 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe021_power.opt_pso.opt.yml/witness.yml [2024-06-21 22:02:04,939 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 22:02:04,940 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 22:02:04,942 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 22:02:04,942 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 22:02:04,945 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 22:02:04,946 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 10:02:04" (1/2) ... [2024-06-21 22:02:04,947 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f6d7e44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:02:04, skipping insertion in model container [2024-06-21 22:02:04,947 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 10:02:04" (1/2) ... [2024-06-21 22:02:04,949 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5b6d61d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:02:04, skipping insertion in model container [2024-06-21 22:02:04,949 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 10:02:04" (2/2) ... [2024-06-21 22:02:04,949 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f6d7e44 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 10:02:04, skipping insertion in model container [2024-06-21 22:02:04,949 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 10:02:04" (2/2) ... [2024-06-21 22:02:04,949 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 22:02:05,018 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 22:02:05,020 INFO L97 edCorrectnessWitness]: Location invariant before [L825-L825] (((((((((((((((((! multithreaded || x$r_buff1_thd3 == (_Bool)0) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((((((((((((((((0 <= __unbuffered_cnt && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 2)) && (x$w_buff1 == 0 || x$w_buff1 == 2)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && ((x == 0 || x == 1) || x == 2)) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2))) && (! multithreaded || (z == 0 || z == 1)) [2024-06-21 22:02:05,020 INFO L97 edCorrectnessWitness]: Location invariant before [L823-L823] (((((((((((((((((! multithreaded || x$r_buff1_thd3 == (_Bool)0) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((((((((((((((((0 <= __unbuffered_cnt && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 2)) && (x$w_buff1 == 0 || x$w_buff1 == 2)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && ((x == 0 || x == 1) || x == 2)) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2))) && (! multithreaded || (z == 0 || z == 1)) [2024-06-21 22:02:05,020 INFO L97 edCorrectnessWitness]: Location invariant before [L826-L826] (((((((((((((((((! multithreaded || x$r_buff1_thd3 == (_Bool)0) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((((((((((((((((0 <= __unbuffered_cnt && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 2)) && (x$w_buff1 == 0 || x$w_buff1 == 2)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && ((x == 0 || x == 1) || x == 2)) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2))) && (! multithreaded || (z == 0 || z == 1)) [2024-06-21 22:02:05,020 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 22:02:05,021 INFO L106 edCorrectnessWitness]: ghost_update [L821-L821] multithreaded = 1; [2024-06-21 22:02:05,066 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 22:02:05,374 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 22:02:05,386 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 22:02:05,506 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 22:02:05,537 INFO L206 MainTranslator]: Completed translation [2024-06-21 22:02:05,537 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 10:02:05 WrapperNode [2024-06-21 22:02:05,537 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 22:02:05,538 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 22:02:05,538 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 22:02:05,538 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 22:02:05,543 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 21.06 10:02:05" (1/1) ... [2024-06-21 22:02:05,555 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 21.06 10:02:05" (1/1) ... [2024-06-21 22:02:05,604 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 144 [2024-06-21 22:02:05,604 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 22:02:05,605 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 22:02:05,605 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 22:02:05,605 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 22:02:05,613 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 10:02:05" (1/1) ... [2024-06-21 22:02:05,614 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 10:02:05" (1/1) ... [2024-06-21 22:02:05,617 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 10:02:05" (1/1) ... [2024-06-21 22:02:05,635 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 22:02:05,636 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 10:02:05" (1/1) ... [2024-06-21 22:02:05,636 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 10:02:05" (1/1) ... [2024-06-21 22:02:05,643 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 10:02:05" (1/1) ... [2024-06-21 22:02:05,644 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 10:02:05" (1/1) ... [2024-06-21 22:02:05,645 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 10:02:05" (1/1) ... [2024-06-21 22:02:05,647 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 10:02:05" (1/1) ... [2024-06-21 22:02:05,649 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 22:02:05,650 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 22:02:05,650 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 22:02:05,650 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 22:02:05,651 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 10:02:05" (1/1) ... [2024-06-21 22:02:05,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 22:02:05,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 22:02:05,686 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 22:02:05,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 22:02:05,732 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 22:02:05,732 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 22:02:05,732 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 22:02:05,732 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 22:02:05,732 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 22:02:05,733 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 22:02:05,733 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 22:02:05,733 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 22:02:05,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 22:02:05,733 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 22:02:05,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 22:02:05,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 22:02:05,735 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 22:02:05,863 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 22:02:05,865 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 22:02:06,119 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 22:02:06,119 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 22:02:06,277 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 22:02:06,277 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 22:02:06,278 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 10:02:06 BoogieIcfgContainer [2024-06-21 22:02:06,278 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 22:02:06,280 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 22:02:06,280 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 22:02:06,282 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 22:02:06,283 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 10:02:04" (1/4) ... [2024-06-21 22:02:06,283 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d1efdba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 10:02:06, skipping insertion in model container [2024-06-21 22:02:06,283 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 10:02:04" (2/4) ... [2024-06-21 22:02:06,284 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d1efdba and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 10:02:06, skipping insertion in model container [2024-06-21 22:02:06,284 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 10:02:05" (3/4) ... [2024-06-21 22:02:06,284 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d1efdba and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 10:02:06, skipping insertion in model container [2024-06-21 22:02:06,285 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 10:02:06" (4/4) ... [2024-06-21 22:02:06,285 INFO L112 eAbstractionObserver]: Analyzing ICFG safe021_power.opt_pso.opt.i [2024-06-21 22:02:06,298 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 22:02:06,298 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 22:02:06,298 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 22:02:06,341 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 22:02:06,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-21 22:02:06,395 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-21 22:02:06,395 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 22:02:06,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 64 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 22:02:06,396 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-21 22:02:06,400 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-21 22:02:06,412 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 22:02:06,417 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;@7146b61d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 22:02:06,417 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 22:02:06,420 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 22:02:06,420 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 22:02:06,420 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 22:02:06,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:06,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 22:02:06,421 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:06,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:06,468 INFO L85 PathProgramCache]: Analyzing trace with hash 372110564, now seen corresponding path program 1 times [2024-06-21 22:02:06,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:06,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410513851] [2024-06-21 22:02:06,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:06,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:06,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:07,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:07,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:07,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410513851] [2024-06-21 22:02:07,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410513851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:07,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:07,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 22:02:07,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977709632] [2024-06-21 22:02:07,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:07,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 22:02:07,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:07,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 22:02:07,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 22:02:07,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-21 22:02:07,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:07,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:07,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-21 22:02:07,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:07,748 INFO L124 PetriNetUnfolderBase]: 1152/1755 cut-off events. [2024-06-21 22:02:07,749 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-06-21 22:02:07,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3595 conditions, 1755 events. 1152/1755 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 8178 event pairs, 794 based on Foata normal form. 2/1710 useless extension candidates. Maximal degree in co-relation 3583. Up to 1738 conditions per place. [2024-06-21 22:02:07,762 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 32 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-21 22:02:07,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 42 transitions, 171 flow [2024-06-21 22:02:07,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 22:02:07,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 22:02:07,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-06-21 22:02:07,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 22:02:07,773 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 72 transitions. [2024-06-21 22:02:07,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 42 transitions, 171 flow [2024-06-21 22:02:07,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 42 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 22:02:07,777 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-21 22:02:07,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-21 22:02:07,780 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-21 22:02:07,781 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-21 22:02:07,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:07,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:07,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:07,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 22:02:07,781 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:07,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:07,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1117077401, now seen corresponding path program 1 times [2024-06-21 22:02:07,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:07,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314435634] [2024-06-21 22:02:07,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:07,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:07,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:08,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:08,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:08,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314435634] [2024-06-21 22:02:08,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314435634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:08,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:08,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 22:02:08,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334599528] [2024-06-21 22:02:08,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:08,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 22:02:08,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:08,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 22:02:08,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 22:02:08,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 22:02:08,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:08,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:08,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 22:02:08,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:08,536 INFO L124 PetriNetUnfolderBase]: 1395/2101 cut-off events. [2024-06-21 22:02:08,537 INFO L125 PetriNetUnfolderBase]: For 316/316 co-relation queries the response was YES. [2024-06-21 22:02:08,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4853 conditions, 2101 events. 1395/2101 cut-off events. For 316/316 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9517 event pairs, 862 based on Foata normal form. 3/2102 useless extension candidates. Maximal degree in co-relation 4841. Up to 2073 conditions per place. [2024-06-21 22:02:08,547 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 42 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-21 22:02:08,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 54 transitions, 252 flow [2024-06-21 22:02:08,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 22:02:08,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 22:02:08,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 89 transitions. [2024-06-21 22:02:08,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55625 [2024-06-21 22:02:08,551 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 89 transitions. [2024-06-21 22:02:08,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 54 transitions, 252 flow [2024-06-21 22:02:08,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 54 transitions, 246 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 22:02:08,554 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 150 flow [2024-06-21 22:02:08,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=150, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2024-06-21 22:02:08,555 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2024-06-21 22:02:08,555 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 150 flow [2024-06-21 22:02:08,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:08,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:08,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:08,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 22:02:08,558 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:08,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:08,559 INFO L85 PathProgramCache]: Analyzing trace with hash 269662507, now seen corresponding path program 1 times [2024-06-21 22:02:08,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:08,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315682222] [2024-06-21 22:02:08,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:08,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:08,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:09,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:09,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:09,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315682222] [2024-06-21 22:02:09,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315682222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:09,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:09,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 22:02:09,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648479707] [2024-06-21 22:02:09,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:09,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 22:02:09,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:09,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 22:02:09,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 22:02:09,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 22:02:09,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 150 flow. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:09,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:09,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 22:02:09,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:09,328 INFO L124 PetriNetUnfolderBase]: 1383/2083 cut-off events. [2024-06-21 22:02:09,329 INFO L125 PetriNetUnfolderBase]: For 1050/1058 co-relation queries the response was YES. [2024-06-21 22:02:09,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5360 conditions, 2083 events. 1383/2083 cut-off events. For 1050/1058 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9484 event pairs, 612 based on Foata normal form. 12/2093 useless extension candidates. Maximal degree in co-relation 5345. Up to 2025 conditions per place. [2024-06-21 22:02:09,336 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 50 selfloop transitions, 10 changer transitions 0/65 dead transitions. [2024-06-21 22:02:09,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 65 transitions, 338 flow [2024-06-21 22:02:09,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 22:02:09,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 22:02:09,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2024-06-21 22:02:09,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-21 22:02:09,338 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 150 flow. Second operand 5 states and 110 transitions. [2024-06-21 22:02:09,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 65 transitions, 338 flow [2024-06-21 22:02:09,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 65 transitions, 336 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-21 22:02:09,340 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 196 flow [2024-06-21 22:02:09,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=196, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-21 22:02:09,341 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 9 predicate places. [2024-06-21 22:02:09,341 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 196 flow [2024-06-21 22:02:09,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:09,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:09,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:09,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 22:02:09,342 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)] === [2024-06-21 22:02:09,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:09,342 INFO L85 PathProgramCache]: Analyzing trace with hash -265907840, now seen corresponding path program 1 times [2024-06-21 22:02:09,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:09,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324104553] [2024-06-21 22:02:09,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:09,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:09,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:10,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:10,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:10,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324104553] [2024-06-21 22:02:10,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324104553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:10,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:10,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 22:02:10,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550417711] [2024-06-21 22:02:10,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:10,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 22:02:10,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:10,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 22:02:10,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 22:02:10,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 22:02:10,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 196 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:10,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:10,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 22:02:10,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:10,599 INFO L124 PetriNetUnfolderBase]: 1374/2068 cut-off events. [2024-06-21 22:02:10,599 INFO L125 PetriNetUnfolderBase]: For 1915/1923 co-relation queries the response was YES. [2024-06-21 22:02:10,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5859 conditions, 2068 events. 1374/2068 cut-off events. For 1915/1923 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9324 event pairs, 472 based on Foata normal form. 12/2078 useless extension candidates. Maximal degree in co-relation 5841. Up to 1980 conditions per place. [2024-06-21 22:02:10,609 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 54 selfloop transitions, 12 changer transitions 0/71 dead transitions. [2024-06-21 22:02:10,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 71 transitions, 402 flow [2024-06-21 22:02:10,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:02:10,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:02:10,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-21 22:02:10,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-21 22:02:10,620 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 196 flow. Second operand 6 states and 126 transitions. [2024-06-21 22:02:10,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 71 transitions, 402 flow [2024-06-21 22:02:10,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 71 transitions, 380 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-21 22:02:10,623 INFO L231 Difference]: Finished difference. Result has 52 places, 44 transitions, 215 flow [2024-06-21 22:02:10,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=215, PETRI_PLACES=52, PETRI_TRANSITIONS=44} [2024-06-21 22:02:10,625 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 11 predicate places. [2024-06-21 22:02:10,625 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 44 transitions, 215 flow [2024-06-21 22:02:10,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:10,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:10,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:10,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 22:02:10,626 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:10,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:10,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1195026544, now seen corresponding path program 1 times [2024-06-21 22:02:10,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:10,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146601795] [2024-06-21 22:02:10,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:10,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:10,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:11,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:11,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:11,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146601795] [2024-06-21 22:02:11,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146601795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:11,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:11,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 22:02:11,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290891886] [2024-06-21 22:02:11,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:11,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 22:02:11,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:11,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 22:02:11,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 22:02:11,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 22:02:11,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 44 transitions, 215 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:11,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:11,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 22:02:11,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:11,534 INFO L124 PetriNetUnfolderBase]: 1323/2032 cut-off events. [2024-06-21 22:02:11,535 INFO L125 PetriNetUnfolderBase]: For 3107/3182 co-relation queries the response was YES. [2024-06-21 22:02:11,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6035 conditions, 2032 events. 1323/2032 cut-off events. For 3107/3182 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 9563 event pairs, 816 based on Foata normal form. 4/1966 useless extension candidates. Maximal degree in co-relation 6015. Up to 1926 conditions per place. [2024-06-21 22:02:11,544 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 42 selfloop transitions, 12 changer transitions 0/63 dead transitions. [2024-06-21 22:02:11,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 63 transitions, 387 flow [2024-06-21 22:02:11,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:02:11,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:02:11,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-21 22:02:11,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 22:02:11,545 INFO L175 Difference]: Start difference. First operand has 52 places, 44 transitions, 215 flow. Second operand 6 states and 100 transitions. [2024-06-21 22:02:11,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 63 transitions, 387 flow [2024-06-21 22:02:11,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 63 transitions, 354 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-21 22:02:11,549 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 274 flow [2024-06-21 22:02:11,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=274, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2024-06-21 22:02:11,550 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 15 predicate places. [2024-06-21 22:02:11,550 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 274 flow [2024-06-21 22:02:11,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:11,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:11,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:11,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 22:02:11,550 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:11,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:11,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1608883590, now seen corresponding path program 1 times [2024-06-21 22:02:11,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:11,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478509914] [2024-06-21 22:02:11,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:11,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:11,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:12,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:12,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:12,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478509914] [2024-06-21 22:02:12,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478509914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:12,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:12,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 22:02:12,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096119977] [2024-06-21 22:02:12,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:12,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 22:02:12,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:12,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 22:02:12,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 22:02:12,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 22:02:12,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 274 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 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) [2024-06-21 22:02:12,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:12,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 22:02:12,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:12,373 INFO L124 PetriNetUnfolderBase]: 1532/2328 cut-off events. [2024-06-21 22:02:12,373 INFO L125 PetriNetUnfolderBase]: For 4775/4833 co-relation queries the response was YES. [2024-06-21 22:02:12,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7559 conditions, 2328 events. 1532/2328 cut-off events. For 4775/4833 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 11051 event pairs, 959 based on Foata normal form. 2/2279 useless extension candidates. Maximal degree in co-relation 7535. Up to 2230 conditions per place. [2024-06-21 22:02:12,385 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 55 selfloop transitions, 12 changer transitions 0/75 dead transitions. [2024-06-21 22:02:12,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 75 transitions, 492 flow [2024-06-21 22:02:12,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:02:12,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:02:12,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-21 22:02:12,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 22:02:12,387 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 274 flow. Second operand 6 states and 100 transitions. [2024-06-21 22:02:12,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 75 transitions, 492 flow [2024-06-21 22:02:12,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 75 transitions, 473 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-21 22:02:12,390 INFO L231 Difference]: Finished difference. Result has 62 places, 61 transitions, 358 flow [2024-06-21 22:02:12,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=358, PETRI_PLACES=62, PETRI_TRANSITIONS=61} [2024-06-21 22:02:12,391 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 21 predicate places. [2024-06-21 22:02:12,391 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 61 transitions, 358 flow [2024-06-21 22:02:12,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 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) [2024-06-21 22:02:12,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:12,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:12,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 22:02:12,392 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:12,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:12,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1337309475, now seen corresponding path program 1 times [2024-06-21 22:02:12,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:12,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666942467] [2024-06-21 22:02:12,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:12,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:12,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:12,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:12,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:12,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666942467] [2024-06-21 22:02:12,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666942467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:12,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:12,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 22:02:12,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850190983] [2024-06-21 22:02:12,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:12,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 22:02:12,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:12,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 22:02:12,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 22:02:12,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 22:02:12,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 61 transitions, 358 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 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) [2024-06-21 22:02:12,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:12,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 22:02:12,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:13,258 INFO L124 PetriNetUnfolderBase]: 1557/2368 cut-off events. [2024-06-21 22:02:13,258 INFO L125 PetriNetUnfolderBase]: For 6190/6203 co-relation queries the response was YES. [2024-06-21 22:02:13,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8336 conditions, 2368 events. 1557/2368 cut-off events. For 6190/6203 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 11035 event pairs, 893 based on Foata normal form. 8/2352 useless extension candidates. Maximal degree in co-relation 8308. Up to 2286 conditions per place. [2024-06-21 22:02:13,270 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 63 selfloop transitions, 19 changer transitions 0/89 dead transitions. [2024-06-21 22:02:13,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 89 transitions, 615 flow [2024-06-21 22:02:13,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:02:13,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:02:13,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-21 22:02:13,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 22:02:13,272 INFO L175 Difference]: Start difference. First operand has 62 places, 61 transitions, 358 flow. Second operand 7 states and 119 transitions. [2024-06-21 22:02:13,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 89 transitions, 615 flow [2024-06-21 22:02:13,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 89 transitions, 609 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-21 22:02:13,279 INFO L231 Difference]: Finished difference. Result has 69 places, 69 transitions, 455 flow [2024-06-21 22:02:13,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=455, PETRI_PLACES=69, PETRI_TRANSITIONS=69} [2024-06-21 22:02:13,281 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 28 predicate places. [2024-06-21 22:02:13,281 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 69 transitions, 455 flow [2024-06-21 22:02:13,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 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) [2024-06-21 22:02:13,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:13,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:13,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 22:02:13,282 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:13,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:13,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1669937297, now seen corresponding path program 2 times [2024-06-21 22:02:13,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:13,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891735004] [2024-06-21 22:02:13,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:13,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:13,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:13,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:13,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:13,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891735004] [2024-06-21 22:02:13,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891735004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:13,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:13,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 22:02:13,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308487425] [2024-06-21 22:02:13,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:13,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 22:02:13,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:13,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 22:02:13,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 22:02:13,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 22:02:13,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 69 transitions, 455 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 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) [2024-06-21 22:02:13,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:13,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 22:02:13,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:14,160 INFO L124 PetriNetUnfolderBase]: 1542/2349 cut-off events. [2024-06-21 22:02:14,161 INFO L125 PetriNetUnfolderBase]: For 8329/8354 co-relation queries the response was YES. [2024-06-21 22:02:14,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8964 conditions, 2349 events. 1542/2349 cut-off events. For 8329/8354 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 10921 event pairs, 889 based on Foata normal form. 10/2334 useless extension candidates. Maximal degree in co-relation 8932. Up to 2256 conditions per place. [2024-06-21 22:02:14,174 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 61 selfloop transitions, 20 changer transitions 0/88 dead transitions. [2024-06-21 22:02:14,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 88 transitions, 687 flow [2024-06-21 22:02:14,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:02:14,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:02:14,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-21 22:02:14,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42916666666666664 [2024-06-21 22:02:14,176 INFO L175 Difference]: Start difference. First operand has 69 places, 69 transitions, 455 flow. Second operand 6 states and 103 transitions. [2024-06-21 22:02:14,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 88 transitions, 687 flow [2024-06-21 22:02:14,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 88 transitions, 645 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 22:02:14,183 INFO L231 Difference]: Finished difference. Result has 71 places, 72 transitions, 493 flow [2024-06-21 22:02:14,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=493, PETRI_PLACES=71, PETRI_TRANSITIONS=72} [2024-06-21 22:02:14,183 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 30 predicate places. [2024-06-21 22:02:14,184 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 72 transitions, 493 flow [2024-06-21 22:02:14,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 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) [2024-06-21 22:02:14,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:14,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:14,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 22:02:14,184 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:14,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:14,185 INFO L85 PathProgramCache]: Analyzing trace with hash -5122763, now seen corresponding path program 3 times [2024-06-21 22:02:14,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:14,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821560548] [2024-06-21 22:02:14,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:14,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:14,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:14,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:14,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:14,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821560548] [2024-06-21 22:02:14,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821560548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:14,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:14,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 22:02:14,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915620739] [2024-06-21 22:02:14,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:14,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 22:02:14,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:14,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 22:02:14,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 22:02:14,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 22:02:14,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 72 transitions, 493 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 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) [2024-06-21 22:02:14,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:14,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 22:02:14,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:15,207 INFO L124 PetriNetUnfolderBase]: 1566/2385 cut-off events. [2024-06-21 22:02:15,207 INFO L125 PetriNetUnfolderBase]: For 10833/10860 co-relation queries the response was YES. [2024-06-21 22:02:15,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9751 conditions, 2385 events. 1566/2385 cut-off events. For 10833/10860 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 11148 event pairs, 890 based on Foata normal form. 12/2371 useless extension candidates. Maximal degree in co-relation 9718. Up to 2269 conditions per place. [2024-06-21 22:02:15,221 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 60 selfloop transitions, 25 changer transitions 0/92 dead transitions. [2024-06-21 22:02:15,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 92 transitions, 757 flow [2024-06-21 22:02:15,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:02:15,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:02:15,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-21 22:02:15,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 22:02:15,241 INFO L175 Difference]: Start difference. First operand has 71 places, 72 transitions, 493 flow. Second operand 6 states and 102 transitions. [2024-06-21 22:02:15,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 92 transitions, 757 flow [2024-06-21 22:02:15,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 92 transitions, 697 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-21 22:02:15,251 INFO L231 Difference]: Finished difference. Result has 74 places, 78 transitions, 569 flow [2024-06-21 22:02:15,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=569, PETRI_PLACES=74, PETRI_TRANSITIONS=78} [2024-06-21 22:02:15,251 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 33 predicate places. [2024-06-21 22:02:15,252 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 78 transitions, 569 flow [2024-06-21 22:02:15,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 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) [2024-06-21 22:02:15,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:15,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:15,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 22:02:15,254 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)] === [2024-06-21 22:02:15,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:15,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1664215441, now seen corresponding path program 1 times [2024-06-21 22:02:15,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:15,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990214962] [2024-06-21 22:02:15,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:15,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:15,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:16,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:16,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:16,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990214962] [2024-06-21 22:02:16,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990214962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:16,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:16,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:02:16,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148355473] [2024-06-21 22:02:16,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:16,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:02:16,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:16,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:02:16,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:02:16,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 22:02:16,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 78 transitions, 569 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:16,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:16,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 22:02:16,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:16,426 INFO L124 PetriNetUnfolderBase]: 1606/2421 cut-off events. [2024-06-21 22:02:16,427 INFO L125 PetriNetUnfolderBase]: For 11599/11684 co-relation queries the response was YES. [2024-06-21 22:02:16,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9778 conditions, 2421 events. 1606/2421 cut-off events. For 11599/11684 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 11409 event pairs, 964 based on Foata normal form. 2/2356 useless extension candidates. Maximal degree in co-relation 9743. Up to 2311 conditions per place. [2024-06-21 22:02:16,440 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 71 selfloop transitions, 15 changer transitions 0/99 dead transitions. [2024-06-21 22:02:16,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 99 transitions, 809 flow [2024-06-21 22:02:16,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:02:16,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:02:16,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-21 22:02:16,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-21 22:02:16,442 INFO L175 Difference]: Start difference. First operand has 74 places, 78 transitions, 569 flow. Second operand 7 states and 115 transitions. [2024-06-21 22:02:16,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 99 transitions, 809 flow [2024-06-21 22:02:16,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 99 transitions, 759 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-21 22:02:16,450 INFO L231 Difference]: Finished difference. Result has 78 places, 81 transitions, 577 flow [2024-06-21 22:02:16,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=519, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=577, PETRI_PLACES=78, PETRI_TRANSITIONS=81} [2024-06-21 22:02:16,451 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 37 predicate places. [2024-06-21 22:02:16,451 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 81 transitions, 577 flow [2024-06-21 22:02:16,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:16,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:16,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:16,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 22:02:16,452 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:16,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:16,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1014233227, now seen corresponding path program 1 times [2024-06-21 22:02:16,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:16,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399229211] [2024-06-21 22:02:16,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:16,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:16,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:16,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:16,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:16,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399229211] [2024-06-21 22:02:16,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399229211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:16,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:16,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:02:16,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418933113] [2024-06-21 22:02:16,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:16,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:02:16,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:16,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:02:16,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:02:17,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 22:02:17,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 81 transitions, 577 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:17,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:17,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 22:02:17,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:17,408 INFO L124 PetriNetUnfolderBase]: 1574/2380 cut-off events. [2024-06-21 22:02:17,408 INFO L125 PetriNetUnfolderBase]: For 12815/12921 co-relation queries the response was YES. [2024-06-21 22:02:17,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10096 conditions, 2380 events. 1574/2380 cut-off events. For 12815/12921 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 11047 event pairs, 593 based on Foata normal form. 41/2370 useless extension candidates. Maximal degree in co-relation 10060. Up to 2221 conditions per place. [2024-06-21 22:02:17,421 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 84 selfloop transitions, 28 changer transitions 0/120 dead transitions. [2024-06-21 22:02:17,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 120 transitions, 939 flow [2024-06-21 22:02:17,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:02:17,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:02:17,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 22:02:17,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434375 [2024-06-21 22:02:17,423 INFO L175 Difference]: Start difference. First operand has 78 places, 81 transitions, 577 flow. Second operand 8 states and 139 transitions. [2024-06-21 22:02:17,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 120 transitions, 939 flow [2024-06-21 22:02:17,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 120 transitions, 905 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 22:02:17,432 INFO L231 Difference]: Finished difference. Result has 83 places, 92 transitions, 685 flow [2024-06-21 22:02:17,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=543, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=685, PETRI_PLACES=83, PETRI_TRANSITIONS=92} [2024-06-21 22:02:17,433 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 42 predicate places. [2024-06-21 22:02:17,433 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 92 transitions, 685 flow [2024-06-21 22:02:17,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:17,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:17,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:17,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 22:02:17,434 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:17,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:17,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1491979649, now seen corresponding path program 2 times [2024-06-21 22:02:17,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:17,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211410762] [2024-06-21 22:02:17,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:17,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:17,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:18,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:18,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:18,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211410762] [2024-06-21 22:02:18,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211410762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:18,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:18,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:02:18,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846686612] [2024-06-21 22:02:18,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:18,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:02:18,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:18,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:02:18,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:02:18,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 22:02:18,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 92 transitions, 685 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:18,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:18,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 22:02:18,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:18,579 INFO L124 PetriNetUnfolderBase]: 1648/2489 cut-off events. [2024-06-21 22:02:18,579 INFO L125 PetriNetUnfolderBase]: For 16523/16699 co-relation queries the response was YES. [2024-06-21 22:02:18,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11559 conditions, 2489 events. 1648/2489 cut-off events. For 16523/16699 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 11607 event pairs, 554 based on Foata normal form. 60/2494 useless extension candidates. Maximal degree in co-relation 11520. Up to 2299 conditions per place. [2024-06-21 22:02:18,597 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 86 selfloop transitions, 41 changer transitions 0/135 dead transitions. [2024-06-21 22:02:18,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 135 transitions, 1163 flow [2024-06-21 22:02:18,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:02:18,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:02:18,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 22:02:18,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 22:02:18,600 INFO L175 Difference]: Start difference. First operand has 83 places, 92 transitions, 685 flow. Second operand 8 states and 140 transitions. [2024-06-21 22:02:18,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 135 transitions, 1163 flow [2024-06-21 22:02:18,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 135 transitions, 1088 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-21 22:02:18,616 INFO L231 Difference]: Finished difference. Result has 90 places, 110 transitions, 889 flow [2024-06-21 22:02:18,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=637, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=889, PETRI_PLACES=90, PETRI_TRANSITIONS=110} [2024-06-21 22:02:18,618 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 49 predicate places. [2024-06-21 22:02:18,618 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 110 transitions, 889 flow [2024-06-21 22:02:18,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:18,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:18,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:18,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 22:02:18,620 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:18,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:18,620 INFO L85 PathProgramCache]: Analyzing trace with hash 2016711183, now seen corresponding path program 1 times [2024-06-21 22:02:18,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:18,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042828678] [2024-06-21 22:02:18,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:18,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:18,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:19,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:19,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:19,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042828678] [2024-06-21 22:02:19,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042828678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:19,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:19,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:02:19,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926809152] [2024-06-21 22:02:19,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:19,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:02:19,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:19,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:02:19,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:02:19,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:02:19,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 110 transitions, 889 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 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) [2024-06-21 22:02:19,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:19,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:02:19,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:19,642 INFO L124 PetriNetUnfolderBase]: 1796/2691 cut-off events. [2024-06-21 22:02:19,642 INFO L125 PetriNetUnfolderBase]: For 18873/18873 co-relation queries the response was YES. [2024-06-21 22:02:19,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12860 conditions, 2691 events. 1796/2691 cut-off events. For 18873/18873 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12432 event pairs, 826 based on Foata normal form. 2/2692 useless extension candidates. Maximal degree in co-relation 12818. Up to 2626 conditions per place. [2024-06-21 22:02:19,659 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 123 selfloop transitions, 20 changer transitions 0/146 dead transitions. [2024-06-21 22:02:19,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 146 transitions, 1367 flow [2024-06-21 22:02:19,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:02:19,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:02:19,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 22:02:19,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396875 [2024-06-21 22:02:19,661 INFO L175 Difference]: Start difference. First operand has 90 places, 110 transitions, 889 flow. Second operand 8 states and 127 transitions. [2024-06-21 22:02:19,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 146 transitions, 1367 flow [2024-06-21 22:02:19,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 146 transitions, 1300 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 22:02:19,676 INFO L231 Difference]: Finished difference. Result has 98 places, 122 transitions, 1016 flow [2024-06-21 22:02:19,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=832, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1016, PETRI_PLACES=98, PETRI_TRANSITIONS=122} [2024-06-21 22:02:19,677 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 57 predicate places. [2024-06-21 22:02:19,677 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 122 transitions, 1016 flow [2024-06-21 22:02:19,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 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) [2024-06-21 22:02:19,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:19,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:19,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 22:02:19,678 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:19,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:19,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1458916289, now seen corresponding path program 3 times [2024-06-21 22:02:19,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:19,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859766030] [2024-06-21 22:02:19,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:19,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:19,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:20,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:20,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:20,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859766030] [2024-06-21 22:02:20,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859766030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:20,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:20,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:02:20,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165103923] [2024-06-21 22:02:20,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:20,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:02:20,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:20,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:02:20,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:02:20,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 22:02:20,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 122 transitions, 1016 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:20,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:20,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 22:02:20,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:20,725 INFO L124 PetriNetUnfolderBase]: 1721/2604 cut-off events. [2024-06-21 22:02:20,726 INFO L125 PetriNetUnfolderBase]: For 24752/24848 co-relation queries the response was YES. [2024-06-21 22:02:20,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13305 conditions, 2604 events. 1721/2604 cut-off events. For 24752/24848 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 12243 event pairs, 535 based on Foata normal form. 45/2594 useless extension candidates. Maximal degree in co-relation 13259. Up to 2329 conditions per place. [2024-06-21 22:02:20,741 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 90 selfloop transitions, 54 changer transitions 0/156 dead transitions. [2024-06-21 22:02:20,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 156 transitions, 1516 flow [2024-06-21 22:02:20,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:02:20,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:02:20,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 22:02:20,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.446875 [2024-06-21 22:02:20,743 INFO L175 Difference]: Start difference. First operand has 98 places, 122 transitions, 1016 flow. Second operand 8 states and 143 transitions. [2024-06-21 22:02:20,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 156 transitions, 1516 flow [2024-06-21 22:02:20,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 156 transitions, 1485 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-21 22:02:20,756 INFO L231 Difference]: Finished difference. Result has 104 places, 128 transitions, 1176 flow [2024-06-21 22:02:20,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=985, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1176, PETRI_PLACES=104, PETRI_TRANSITIONS=128} [2024-06-21 22:02:20,757 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 63 predicate places. [2024-06-21 22:02:20,757 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 128 transitions, 1176 flow [2024-06-21 22:02:20,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:20,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:20,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:20,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 22:02:20,758 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:20,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:20,758 INFO L85 PathProgramCache]: Analyzing trace with hash -228568021, now seen corresponding path program 4 times [2024-06-21 22:02:20,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:20,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083948181] [2024-06-21 22:02:20,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:20,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:20,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:21,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:21,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:21,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083948181] [2024-06-21 22:02:21,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083948181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:21,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:21,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:02:21,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753285983] [2024-06-21 22:02:21,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:21,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:02:21,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:21,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:02:21,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:02:21,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 22:02:21,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 128 transitions, 1176 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:21,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:21,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 22:02:21,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:21,814 INFO L124 PetriNetUnfolderBase]: 1704/2582 cut-off events. [2024-06-21 22:02:21,814 INFO L125 PetriNetUnfolderBase]: For 29940/30081 co-relation queries the response was YES. [2024-06-21 22:02:21,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13960 conditions, 2582 events. 1704/2582 cut-off events. For 29940/30081 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12114 event pairs, 566 based on Foata normal form. 54/2579 useless extension candidates. Maximal degree in co-relation 13912. Up to 2335 conditions per place. [2024-06-21 22:02:21,833 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 94 selfloop transitions, 48 changer transitions 0/154 dead transitions. [2024-06-21 22:02:21,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 154 transitions, 1580 flow [2024-06-21 22:02:21,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:02:21,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:02:21,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 22:02:21,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392857142857143 [2024-06-21 22:02:21,835 INFO L175 Difference]: Start difference. First operand has 104 places, 128 transitions, 1176 flow. Second operand 7 states and 123 transitions. [2024-06-21 22:02:21,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 154 transitions, 1580 flow [2024-06-21 22:02:21,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 154 transitions, 1508 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-21 22:02:21,855 INFO L231 Difference]: Finished difference. Result has 107 places, 131 transitions, 1266 flow [2024-06-21 22:02:21,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1104, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1266, PETRI_PLACES=107, PETRI_TRANSITIONS=131} [2024-06-21 22:02:21,855 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 66 predicate places. [2024-06-21 22:02:21,856 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 131 transitions, 1266 flow [2024-06-21 22:02:21,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:21,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:21,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:21,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 22:02:21,856 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:21,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:21,857 INFO L85 PathProgramCache]: Analyzing trace with hash -228447865, now seen corresponding path program 2 times [2024-06-21 22:02:21,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:21,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336083735] [2024-06-21 22:02:21,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:21,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:21,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:22,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:22,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:22,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336083735] [2024-06-21 22:02:22,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336083735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:22,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:22,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:02:22,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879195615] [2024-06-21 22:02:22,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:22,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:02:22,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:22,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:02:22,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:02:22,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:02:22,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 131 transitions, 1266 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 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) [2024-06-21 22:02:22,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:22,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:02:22,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:22,992 INFO L124 PetriNetUnfolderBase]: 1895/2833 cut-off events. [2024-06-21 22:02:22,993 INFO L125 PetriNetUnfolderBase]: For 31633/31635 co-relation queries the response was YES. [2024-06-21 22:02:23,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15651 conditions, 2833 events. 1895/2833 cut-off events. For 31633/31635 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13153 event pairs, 823 based on Foata normal form. 4/2836 useless extension candidates. Maximal degree in co-relation 15601. Up to 2750 conditions per place. [2024-06-21 22:02:23,012 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 130 selfloop transitions, 24 changer transitions 0/157 dead transitions. [2024-06-21 22:02:23,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 157 transitions, 1692 flow [2024-06-21 22:02:23,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:02:23,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:02:23,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-21 22:02:23,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 22:02:23,014 INFO L175 Difference]: Start difference. First operand has 107 places, 131 transitions, 1266 flow. Second operand 7 states and 112 transitions. [2024-06-21 22:02:23,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 157 transitions, 1692 flow [2024-06-21 22:02:23,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 157 transitions, 1596 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 22:02:23,038 INFO L231 Difference]: Finished difference. Result has 110 places, 137 transitions, 1298 flow [2024-06-21 22:02:23,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1170, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1298, PETRI_PLACES=110, PETRI_TRANSITIONS=137} [2024-06-21 22:02:23,038 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 69 predicate places. [2024-06-21 22:02:23,039 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 137 transitions, 1298 flow [2024-06-21 22:02:23,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 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) [2024-06-21 22:02:23,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:23,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:23,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 22:02:23,039 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:23,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:23,040 INFO L85 PathProgramCache]: Analyzing trace with hash -163446679, now seen corresponding path program 5 times [2024-06-21 22:02:23,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:23,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798228453] [2024-06-21 22:02:23,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:23,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:23,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:23,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:23,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:23,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798228453] [2024-06-21 22:02:23,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798228453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:23,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:23,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:02:23,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910665355] [2024-06-21 22:02:23,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:23,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:02:23,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:23,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:02:23,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:02:23,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 22:02:23,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 137 transitions, 1298 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:23,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:23,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 22:02:23,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:24,169 INFO L124 PetriNetUnfolderBase]: 1797/2715 cut-off events. [2024-06-21 22:02:24,170 INFO L125 PetriNetUnfolderBase]: For 39179/39290 co-relation queries the response was YES. [2024-06-21 22:02:24,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15957 conditions, 2715 events. 1797/2715 cut-off events. For 39179/39290 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 12745 event pairs, 538 based on Foata normal form. 51/2705 useless extension candidates. Maximal degree in co-relation 15905. Up to 2374 conditions per place. [2024-06-21 22:02:24,191 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 91 selfloop transitions, 62 changer transitions 0/167 dead transitions. [2024-06-21 22:02:24,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 167 transitions, 1840 flow [2024-06-21 22:02:24,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:02:24,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:02:24,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 22:02:24,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-21 22:02:24,192 INFO L175 Difference]: Start difference. First operand has 110 places, 137 transitions, 1298 flow. Second operand 7 states and 125 transitions. [2024-06-21 22:02:24,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 167 transitions, 1840 flow [2024-06-21 22:02:24,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 167 transitions, 1795 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 22:02:24,219 INFO L231 Difference]: Finished difference. Result has 114 places, 143 transitions, 1493 flow [2024-06-21 22:02:24,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1257, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1493, PETRI_PLACES=114, PETRI_TRANSITIONS=143} [2024-06-21 22:02:24,219 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 73 predicate places. [2024-06-21 22:02:24,219 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 143 transitions, 1493 flow [2024-06-21 22:02:24,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:24,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:24,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:24,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 22:02:24,220 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:24,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:24,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1662270007, now seen corresponding path program 6 times [2024-06-21 22:02:24,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:24,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764934997] [2024-06-21 22:02:24,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:24,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:24,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:24,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:24,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:24,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764934997] [2024-06-21 22:02:24,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764934997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:24,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:24,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:02:24,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212061925] [2024-06-21 22:02:24,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:24,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:02:24,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:24,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:02:24,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:02:24,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 22:02:24,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 143 transitions, 1493 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:24,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:24,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 22:02:24,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:25,228 INFO L124 PetriNetUnfolderBase]: 1798/2718 cut-off events. [2024-06-21 22:02:25,228 INFO L125 PetriNetUnfolderBase]: For 41050/41164 co-relation queries the response was YES. [2024-06-21 22:02:25,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16237 conditions, 2718 events. 1798/2718 cut-off events. For 41050/41164 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 12767 event pairs, 549 based on Foata normal form. 59/2712 useless extension candidates. Maximal degree in co-relation 16183. Up to 2330 conditions per place. [2024-06-21 22:02:25,245 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 88 selfloop transitions, 66 changer transitions 0/168 dead transitions. [2024-06-21 22:02:25,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 168 transitions, 1991 flow [2024-06-21 22:02:25,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:02:25,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:02:25,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-21 22:02:25,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-21 22:02:25,248 INFO L175 Difference]: Start difference. First operand has 114 places, 143 transitions, 1493 flow. Second operand 7 states and 124 transitions. [2024-06-21 22:02:25,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 168 transitions, 1991 flow [2024-06-21 22:02:25,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 168 transitions, 1900 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-21 22:02:25,270 INFO L231 Difference]: Finished difference. Result has 117 places, 146 transitions, 1604 flow [2024-06-21 22:02:25,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1412, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1604, PETRI_PLACES=117, PETRI_TRANSITIONS=146} [2024-06-21 22:02:25,270 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 76 predicate places. [2024-06-21 22:02:25,271 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 146 transitions, 1604 flow [2024-06-21 22:02:25,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:25,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:25,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:25,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 22:02:25,271 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:25,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:25,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1662270193, now seen corresponding path program 3 times [2024-06-21 22:02:25,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:25,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78283724] [2024-06-21 22:02:25,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:25,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:25,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:25,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:25,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:25,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78283724] [2024-06-21 22:02:25,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78283724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:25,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:25,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:02:25,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91959290] [2024-06-21 22:02:25,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:25,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:02:25,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:25,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:02:25,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:02:25,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:02:25,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 146 transitions, 1604 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 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) [2024-06-21 22:02:25,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:25,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:02:25,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:26,464 INFO L124 PetriNetUnfolderBase]: 1946/2910 cut-off events. [2024-06-21 22:02:26,464 INFO L125 PetriNetUnfolderBase]: For 36553/36557 co-relation queries the response was YES. [2024-06-21 22:02:26,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16985 conditions, 2910 events. 1946/2910 cut-off events. For 36553/36557 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13603 event pairs, 831 based on Foata normal form. 6/2914 useless extension candidates. Maximal degree in co-relation 16930. Up to 2777 conditions per place. [2024-06-21 22:02:26,481 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 136 selfloop transitions, 36 changer transitions 0/175 dead transitions. [2024-06-21 22:02:26,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 175 transitions, 2152 flow [2024-06-21 22:02:26,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:02:26,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:02:26,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-21 22:02:26,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-06-21 22:02:26,484 INFO L175 Difference]: Start difference. First operand has 117 places, 146 transitions, 1604 flow. Second operand 8 states and 124 transitions. [2024-06-21 22:02:26,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 175 transitions, 2152 flow [2024-06-21 22:02:26,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 175 transitions, 1981 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 22:02:26,508 INFO L231 Difference]: Finished difference. Result has 121 places, 155 transitions, 1608 flow [2024-06-21 22:02:26,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1436, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1608, PETRI_PLACES=121, PETRI_TRANSITIONS=155} [2024-06-21 22:02:26,509 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 80 predicate places. [2024-06-21 22:02:26,509 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 155 transitions, 1608 flow [2024-06-21 22:02:26,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 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) [2024-06-21 22:02:26,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:26,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:26,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 22:02:26,509 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:26,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:26,510 INFO L85 PathProgramCache]: Analyzing trace with hash -51079195, now seen corresponding path program 4 times [2024-06-21 22:02:26,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:26,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776094175] [2024-06-21 22:02:26,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:26,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:26,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:27,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:27,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:27,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776094175] [2024-06-21 22:02:27,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776094175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:27,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:27,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:02:27,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932341046] [2024-06-21 22:02:27,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:27,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:02:27,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:27,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:02:27,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:02:27,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:02:27,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 155 transitions, 1608 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 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) [2024-06-21 22:02:27,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:27,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:02:27,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:27,583 INFO L124 PetriNetUnfolderBase]: 1941/2903 cut-off events. [2024-06-21 22:02:27,583 INFO L125 PetriNetUnfolderBase]: For 38796/38800 co-relation queries the response was YES. [2024-06-21 22:02:27,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17139 conditions, 2903 events. 1941/2903 cut-off events. For 38796/38800 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13519 event pairs, 831 based on Foata normal form. 6/2907 useless extension candidates. Maximal degree in co-relation 17082. Up to 2772 conditions per place. [2024-06-21 22:02:27,599 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 134 selfloop transitions, 37 changer transitions 0/174 dead transitions. [2024-06-21 22:02:27,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 174 transitions, 2023 flow [2024-06-21 22:02:27,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:02:27,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:02:27,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-21 22:02:27,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 22:02:27,602 INFO L175 Difference]: Start difference. First operand has 121 places, 155 transitions, 1608 flow. Second operand 7 states and 112 transitions. [2024-06-21 22:02:27,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 174 transitions, 2023 flow [2024-06-21 22:02:27,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 174 transitions, 1932 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-21 22:02:27,631 INFO L231 Difference]: Finished difference. Result has 124 places, 156 transitions, 1610 flow [2024-06-21 22:02:27,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1523, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1610, PETRI_PLACES=124, PETRI_TRANSITIONS=156} [2024-06-21 22:02:27,632 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 83 predicate places. [2024-06-21 22:02:27,632 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 156 transitions, 1610 flow [2024-06-21 22:02:27,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 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) [2024-06-21 22:02:27,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:27,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:27,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 22:02:27,632 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)] === [2024-06-21 22:02:27,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:27,633 INFO L85 PathProgramCache]: Analyzing trace with hash -51070267, now seen corresponding path program 1 times [2024-06-21 22:02:27,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:27,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790828131] [2024-06-21 22:02:27,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:27,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:27,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:28,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:28,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:28,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790828131] [2024-06-21 22:02:28,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790828131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:28,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:28,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:02:28,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62314042] [2024-06-21 22:02:28,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:28,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:02:28,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:28,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:02:28,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:02:28,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 22:02:28,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 156 transitions, 1610 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:28,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:28,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 22:02:28,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:29,151 INFO L124 PetriNetUnfolderBase]: 1886/2844 cut-off events. [2024-06-21 22:02:29,151 INFO L125 PetriNetUnfolderBase]: For 46123/46318 co-relation queries the response was YES. [2024-06-21 22:02:29,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16929 conditions, 2844 events. 1886/2844 cut-off events. For 46123/46318 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 13623 event pairs, 814 based on Foata normal form. 10/2793 useless extension candidates. Maximal degree in co-relation 16871. Up to 2676 conditions per place. [2024-06-21 22:02:29,174 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 136 selfloop transitions, 18 changer transitions 0/181 dead transitions. [2024-06-21 22:02:29,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 181 transitions, 2012 flow [2024-06-21 22:02:29,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:02:29,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:02:29,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-21 22:02:29,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3861111111111111 [2024-06-21 22:02:29,176 INFO L175 Difference]: Start difference. First operand has 124 places, 156 transitions, 1610 flow. Second operand 9 states and 139 transitions. [2024-06-21 22:02:29,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 181 transitions, 2012 flow [2024-06-21 22:02:29,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 181 transitions, 1954 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-21 22:02:29,204 INFO L231 Difference]: Finished difference. Result has 129 places, 158 transitions, 1615 flow [2024-06-21 22:02:29,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1552, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1615, PETRI_PLACES=129, PETRI_TRANSITIONS=158} [2024-06-21 22:02:29,204 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 88 predicate places. [2024-06-21 22:02:29,204 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 158 transitions, 1615 flow [2024-06-21 22:02:29,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:29,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:29,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:29,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 22:02:29,205 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:29,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:29,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1785116638, now seen corresponding path program 1 times [2024-06-21 22:02:29,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:29,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984580171] [2024-06-21 22:02:29,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:29,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:29,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:30,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:30,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:30,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984580171] [2024-06-21 22:02:30,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984580171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:30,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:30,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:02:30,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753413582] [2024-06-21 22:02:30,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:30,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:02:30,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:30,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:02:30,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:02:30,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 22:02:30,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 158 transitions, 1615 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:30,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:30,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 22:02:30,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:30,589 INFO L124 PetriNetUnfolderBase]: 1798/2723 cut-off events. [2024-06-21 22:02:30,590 INFO L125 PetriNetUnfolderBase]: For 49378/49548 co-relation queries the response was YES. [2024-06-21 22:02:30,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16694 conditions, 2723 events. 1798/2723 cut-off events. For 49378/49548 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12762 event pairs, 706 based on Foata normal form. 46/2721 useless extension candidates. Maximal degree in co-relation 16635. Up to 2472 conditions per place. [2024-06-21 22:02:30,605 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 123 selfloop transitions, 51 changer transitions 0/192 dead transitions. [2024-06-21 22:02:30,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 192 transitions, 2133 flow [2024-06-21 22:02:30,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:02:30,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:02:30,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 22:02:30,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 22:02:30,606 INFO L175 Difference]: Start difference. First operand has 129 places, 158 transitions, 1615 flow. Second operand 8 states and 140 transitions. [2024-06-21 22:02:30,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 192 transitions, 2133 flow [2024-06-21 22:02:30,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 192 transitions, 2087 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 22:02:30,638 INFO L231 Difference]: Finished difference. Result has 131 places, 165 transitions, 1794 flow [2024-06-21 22:02:30,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1569, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1794, PETRI_PLACES=131, PETRI_TRANSITIONS=165} [2024-06-21 22:02:30,639 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 90 predicate places. [2024-06-21 22:02:30,639 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 165 transitions, 1794 flow [2024-06-21 22:02:30,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:30,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:30,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:30,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 22:02:30,639 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:30,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:30,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1376496025, now seen corresponding path program 1 times [2024-06-21 22:02:30,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:30,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407819092] [2024-06-21 22:02:30,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:30,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:30,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:31,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:31,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:31,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407819092] [2024-06-21 22:02:31,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407819092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:31,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:31,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:02:31,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872735096] [2024-06-21 22:02:31,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:31,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:02:31,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:31,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:02:31,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:02:31,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:02:31,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 165 transitions, 1794 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:31,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:31,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:02:31,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:31,807 INFO L124 PetriNetUnfolderBase]: 1988/2962 cut-off events. [2024-06-21 22:02:31,807 INFO L125 PetriNetUnfolderBase]: For 49584/49586 co-relation queries the response was YES. [2024-06-21 22:02:31,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18277 conditions, 2962 events. 1988/2962 cut-off events. For 49584/49586 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13620 event pairs, 602 based on Foata normal form. 6/2967 useless extension candidates. Maximal degree in co-relation 18217. Up to 2791 conditions per place. [2024-06-21 22:02:31,828 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 178 selfloop transitions, 41 changer transitions 0/222 dead transitions. [2024-06-21 22:02:31,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 222 transitions, 2646 flow [2024-06-21 22:02:31,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:02:31,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:02:31,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-21 22:02:31,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-06-21 22:02:31,829 INFO L175 Difference]: Start difference. First operand has 131 places, 165 transitions, 1794 flow. Second operand 9 states and 147 transitions. [2024-06-21 22:02:31,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 222 transitions, 2646 flow [2024-06-21 22:02:31,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 222 transitions, 2516 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 22:02:31,863 INFO L231 Difference]: Finished difference. Result has 138 places, 190 transitions, 2135 flow [2024-06-21 22:02:31,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1685, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2135, PETRI_PLACES=138, PETRI_TRANSITIONS=190} [2024-06-21 22:02:31,864 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 97 predicate places. [2024-06-21 22:02:31,864 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 190 transitions, 2135 flow [2024-06-21 22:02:31,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:31,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:31,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:31,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 22:02:31,864 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:31,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:31,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1076304622, now seen corresponding path program 2 times [2024-06-21 22:02:31,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:31,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018934038] [2024-06-21 22:02:31,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:31,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:31,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:32,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:32,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:32,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018934038] [2024-06-21 22:02:32,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018934038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:32,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:32,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:02:32,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689879761] [2024-06-21 22:02:32,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:32,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:02:32,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:32,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:02:32,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:02:32,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 22:02:32,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 190 transitions, 2135 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:32,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:32,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 22:02:32,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:33,291 INFO L124 PetriNetUnfolderBase]: 1883/2841 cut-off events. [2024-06-21 22:02:33,292 INFO L125 PetriNetUnfolderBase]: For 59218/59353 co-relation queries the response was YES. [2024-06-21 22:02:33,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18707 conditions, 2841 events. 1883/2841 cut-off events. For 59218/59353 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 13384 event pairs, 519 based on Foata normal form. 27/2795 useless extension candidates. Maximal degree in co-relation 18643. Up to 2555 conditions per place. [2024-06-21 22:02:33,314 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 132 selfloop transitions, 68 changer transitions 0/223 dead transitions. [2024-06-21 22:02:33,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 223 transitions, 2719 flow [2024-06-21 22:02:33,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:02:33,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:02:33,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 22:02:33,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.440625 [2024-06-21 22:02:33,316 INFO L175 Difference]: Start difference. First operand has 138 places, 190 transitions, 2135 flow. Second operand 8 states and 141 transitions. [2024-06-21 22:02:33,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 223 transitions, 2719 flow [2024-06-21 22:02:33,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 223 transitions, 2656 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-21 22:02:33,364 INFO L231 Difference]: Finished difference. Result has 144 places, 198 transitions, 2334 flow [2024-06-21 22:02:33,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2072, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2334, PETRI_PLACES=144, PETRI_TRANSITIONS=198} [2024-06-21 22:02:33,364 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 103 predicate places. [2024-06-21 22:02:33,364 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 198 transitions, 2334 flow [2024-06-21 22:02:33,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:33,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:33,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:33,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 22:02:33,365 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:33,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:33,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1359672173, now seen corresponding path program 2 times [2024-06-21 22:02:33,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:33,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412881728] [2024-06-21 22:02:33,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:33,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:33,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:33,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:33,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:33,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412881728] [2024-06-21 22:02:33,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412881728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:33,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:33,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:02:33,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710450247] [2024-06-21 22:02:33,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:33,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:02:33,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:33,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:02:33,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:02:34,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:02:34,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 198 transitions, 2334 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:34,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:34,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:02:34,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:34,566 INFO L124 PetriNetUnfolderBase]: 2040/3038 cut-off events. [2024-06-21 22:02:34,566 INFO L125 PetriNetUnfolderBase]: For 59386/59392 co-relation queries the response was YES. [2024-06-21 22:02:34,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19668 conditions, 3038 events. 2040/3038 cut-off events. For 59386/59392 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13989 event pairs, 572 based on Foata normal form. 10/3047 useless extension candidates. Maximal degree in co-relation 19602. Up to 2857 conditions per place. [2024-06-21 22:02:34,590 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 189 selfloop transitions, 49 changer transitions 0/241 dead transitions. [2024-06-21 22:02:34,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 241 transitions, 3035 flow [2024-06-21 22:02:34,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:02:34,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:02:34,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-21 22:02:34,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4111111111111111 [2024-06-21 22:02:34,591 INFO L175 Difference]: Start difference. First operand has 144 places, 198 transitions, 2334 flow. Second operand 9 states and 148 transitions. [2024-06-21 22:02:34,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 241 transitions, 3035 flow [2024-06-21 22:02:34,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 241 transitions, 2907 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 22:02:34,640 INFO L231 Difference]: Finished difference. Result has 149 places, 211 transitions, 2455 flow [2024-06-21 22:02:34,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2210, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2455, PETRI_PLACES=149, PETRI_TRANSITIONS=211} [2024-06-21 22:02:34,640 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 108 predicate places. [2024-06-21 22:02:34,640 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 211 transitions, 2455 flow [2024-06-21 22:02:34,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:34,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:34,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:34,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 22:02:34,641 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:34,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:34,641 INFO L85 PathProgramCache]: Analyzing trace with hash -2018228710, now seen corresponding path program 1 times [2024-06-21 22:02:34,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:34,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572314753] [2024-06-21 22:02:34,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:34,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:34,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:35,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:35,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:35,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572314753] [2024-06-21 22:02:35,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572314753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:35,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:35,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:02:35,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263963250] [2024-06-21 22:02:35,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:35,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:02:35,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:35,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:02:35,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:02:35,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:02:35,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 211 transitions, 2455 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:35,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:35,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:02:35,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:35,909 INFO L124 PetriNetUnfolderBase]: 2051/3060 cut-off events. [2024-06-21 22:02:35,909 INFO L125 PetriNetUnfolderBase]: For 64859/64863 co-relation queries the response was YES. [2024-06-21 22:02:35,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20329 conditions, 3060 events. 2051/3060 cut-off events. For 64859/64863 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 14230 event pairs, 790 based on Foata normal form. 6/3065 useless extension candidates. Maximal degree in co-relation 20261. Up to 2985 conditions per place. [2024-06-21 22:02:35,934 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 215 selfloop transitions, 24 changer transitions 0/242 dead transitions. [2024-06-21 22:02:35,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 242 transitions, 3065 flow [2024-06-21 22:02:35,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:02:35,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:02:35,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-21 22:02:35,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39166666666666666 [2024-06-21 22:02:35,936 INFO L175 Difference]: Start difference. First operand has 149 places, 211 transitions, 2455 flow. Second operand 9 states and 141 transitions. [2024-06-21 22:02:35,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 242 transitions, 3065 flow [2024-06-21 22:02:35,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 242 transitions, 3028 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-21 22:02:35,994 INFO L231 Difference]: Finished difference. Result has 156 places, 214 transitions, 2508 flow [2024-06-21 22:02:35,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2418, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2508, PETRI_PLACES=156, PETRI_TRANSITIONS=214} [2024-06-21 22:02:35,994 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 115 predicate places. [2024-06-21 22:02:35,995 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 214 transitions, 2508 flow [2024-06-21 22:02:35,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:35,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:35,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:35,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 22:02:35,995 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:35,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:35,996 INFO L85 PathProgramCache]: Analyzing trace with hash -993120617, now seen corresponding path program 3 times [2024-06-21 22:02:36,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:36,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150660757] [2024-06-21 22:02:36,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:36,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:36,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:36,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:36,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:36,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150660757] [2024-06-21 22:02:36,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150660757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:36,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:36,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:02:36,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112019469] [2024-06-21 22:02:36,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:36,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:02:36,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:36,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:02:36,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:02:36,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:02:36,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 214 transitions, 2508 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:36,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:36,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:02:36,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:37,188 INFO L124 PetriNetUnfolderBase]: 2159/3210 cut-off events. [2024-06-21 22:02:37,189 INFO L125 PetriNetUnfolderBase]: For 73912/73914 co-relation queries the response was YES. [2024-06-21 22:02:37,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21932 conditions, 3210 events. 2159/3210 cut-off events. For 73912/73914 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14838 event pairs, 516 based on Foata normal form. 10/3219 useless extension candidates. Maximal degree in co-relation 21862. Up to 2773 conditions per place. [2024-06-21 22:02:37,271 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 189 selfloop transitions, 72 changer transitions 0/264 dead transitions. [2024-06-21 22:02:37,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 264 transitions, 3454 flow [2024-06-21 22:02:37,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:02:37,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:02:37,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 22:02:37,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2024-06-21 22:02:37,273 INFO L175 Difference]: Start difference. First operand has 156 places, 214 transitions, 2508 flow. Second operand 9 states and 154 transitions. [2024-06-21 22:02:37,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 264 transitions, 3454 flow [2024-06-21 22:02:37,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 264 transitions, 3388 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 22:02:37,323 INFO L231 Difference]: Finished difference. Result has 159 places, 230 transitions, 2841 flow [2024-06-21 22:02:37,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2442, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2841, PETRI_PLACES=159, PETRI_TRANSITIONS=230} [2024-06-21 22:02:37,324 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 118 predicate places. [2024-06-21 22:02:37,324 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 230 transitions, 2841 flow [2024-06-21 22:02:37,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:37,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:37,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:37,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 22:02:37,325 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:37,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:37,325 INFO L85 PathProgramCache]: Analyzing trace with hash -2018234507, now seen corresponding path program 4 times [2024-06-21 22:02:37,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:37,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191565677] [2024-06-21 22:02:37,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:37,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:37,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:37,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:37,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:37,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191565677] [2024-06-21 22:02:37,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191565677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:37,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:37,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:02:37,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188026265] [2024-06-21 22:02:37,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:37,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:02:37,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:37,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:02:37,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:02:38,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:02:38,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 230 transitions, 2841 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:38,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:38,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:02:38,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:38,564 INFO L124 PetriNetUnfolderBase]: 2165/3220 cut-off events. [2024-06-21 22:02:38,564 INFO L125 PetriNetUnfolderBase]: For 80661/80663 co-relation queries the response was YES. [2024-06-21 22:02:38,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23037 conditions, 3220 events. 2165/3220 cut-off events. For 80661/80663 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 14892 event pairs, 544 based on Foata normal form. 6/3225 useless extension candidates. Maximal degree in co-relation 22965. Up to 2779 conditions per place. [2024-06-21 22:02:38,591 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 195 selfloop transitions, 70 changer transitions 0/268 dead transitions. [2024-06-21 22:02:38,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 268 transitions, 3674 flow [2024-06-21 22:02:38,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:02:38,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:02:38,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 22:02:38,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2024-06-21 22:02:38,593 INFO L175 Difference]: Start difference. First operand has 159 places, 230 transitions, 2841 flow. Second operand 9 states and 155 transitions. [2024-06-21 22:02:38,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 268 transitions, 3674 flow [2024-06-21 22:02:38,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 268 transitions, 3569 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-21 22:02:38,669 INFO L231 Difference]: Finished difference. Result has 164 places, 234 transitions, 2953 flow [2024-06-21 22:02:38,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2744, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2953, PETRI_PLACES=164, PETRI_TRANSITIONS=234} [2024-06-21 22:02:38,670 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 123 predicate places. [2024-06-21 22:02:38,670 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 234 transitions, 2953 flow [2024-06-21 22:02:38,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:38,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:38,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:38,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 22:02:38,671 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:38,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:38,671 INFO L85 PathProgramCache]: Analyzing trace with hash -775688398, now seen corresponding path program 3 times [2024-06-21 22:02:38,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:38,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077668035] [2024-06-21 22:02:38,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:38,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:38,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:39,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:39,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:39,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077668035] [2024-06-21 22:02:39,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077668035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:39,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:39,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:02:39,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504232402] [2024-06-21 22:02:39,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:39,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:02:39,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:39,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:02:39,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:02:39,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 22:02:39,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 234 transitions, 2953 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:39,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:39,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 22:02:39,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:40,185 INFO L124 PetriNetUnfolderBase]: 2065/3105 cut-off events. [2024-06-21 22:02:40,185 INFO L125 PetriNetUnfolderBase]: For 93003/93264 co-relation queries the response was YES. [2024-06-21 22:02:40,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22960 conditions, 3105 events. 2065/3105 cut-off events. For 93003/93264 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14731 event pairs, 668 based on Foata normal form. 27/3060 useless extension candidates. Maximal degree in co-relation 22886. Up to 2720 conditions per place. [2024-06-21 22:02:40,214 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 134 selfloop transitions, 87 changer transitions 0/257 dead transitions. [2024-06-21 22:02:40,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 257 transitions, 3483 flow [2024-06-21 22:02:40,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:02:40,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:02:40,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 22:02:40,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392857142857143 [2024-06-21 22:02:40,215 INFO L175 Difference]: Start difference. First operand has 164 places, 234 transitions, 2953 flow. Second operand 7 states and 123 transitions. [2024-06-21 22:02:40,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 257 transitions, 3483 flow [2024-06-21 22:02:40,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 257 transitions, 3338 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-21 22:02:40,298 INFO L231 Difference]: Finished difference. Result has 166 places, 234 transitions, 3038 flow [2024-06-21 22:02:40,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2808, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3038, PETRI_PLACES=166, PETRI_TRANSITIONS=234} [2024-06-21 22:02:40,299 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 125 predicate places. [2024-06-21 22:02:40,299 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 234 transitions, 3038 flow [2024-06-21 22:02:40,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:40,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:40,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:40,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 22:02:40,299 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:40,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:40,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1504326731, now seen corresponding path program 5 times [2024-06-21 22:02:40,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:40,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966508920] [2024-06-21 22:02:40,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:40,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:40,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:40,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:40,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:40,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966508920] [2024-06-21 22:02:40,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966508920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:40,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:40,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:02:40,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355818388] [2024-06-21 22:02:40,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:40,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:02:40,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:40,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:02:40,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:02:40,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:02:40,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 234 transitions, 3038 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:40,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:40,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:02:40,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:41,560 INFO L124 PetriNetUnfolderBase]: 2179/3240 cut-off events. [2024-06-21 22:02:41,561 INFO L125 PetriNetUnfolderBase]: For 90846/90852 co-relation queries the response was YES. [2024-06-21 22:02:41,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23639 conditions, 3240 events. 2179/3240 cut-off events. For 90846/90852 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 15089 event pairs, 571 based on Foata normal form. 10/3249 useless extension candidates. Maximal degree in co-relation 23564. Up to 2977 conditions per place. [2024-06-21 22:02:41,588 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 206 selfloop transitions, 59 changer transitions 0/268 dead transitions. [2024-06-21 22:02:41,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 268 transitions, 3768 flow [2024-06-21 22:02:41,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:02:41,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:02:41,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 22:02:41,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-21 22:02:41,590 INFO L175 Difference]: Start difference. First operand has 166 places, 234 transitions, 3038 flow. Second operand 8 states and 132 transitions. [2024-06-21 22:02:41,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 268 transitions, 3768 flow [2024-06-21 22:02:41,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 268 transitions, 3562 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 22:02:41,671 INFO L231 Difference]: Finished difference. Result has 169 places, 240 transitions, 3086 flow [2024-06-21 22:02:41,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2836, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3086, PETRI_PLACES=169, PETRI_TRANSITIONS=240} [2024-06-21 22:02:41,671 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 128 predicate places. [2024-06-21 22:02:41,671 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 240 transitions, 3086 flow [2024-06-21 22:02:41,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:41,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:41,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:41,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 22:02:41,672 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:41,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:41,672 INFO L85 PathProgramCache]: Analyzing trace with hash -771873166, now seen corresponding path program 2 times [2024-06-21 22:02:41,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:41,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290576830] [2024-06-21 22:02:41,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:41,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:41,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:42,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:42,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:42,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290576830] [2024-06-21 22:02:42,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290576830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:42,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:42,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:02:42,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676220873] [2024-06-21 22:02:42,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:42,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:02:42,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:42,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:02:42,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:02:42,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:02:42,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 240 transitions, 3086 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:42,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:42,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:02:42,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:43,032 INFO L124 PetriNetUnfolderBase]: 2243/3335 cut-off events. [2024-06-21 22:02:43,033 INFO L125 PetriNetUnfolderBase]: For 89750/89752 co-relation queries the response was YES. [2024-06-21 22:02:43,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24483 conditions, 3335 events. 2243/3335 cut-off events. For 89750/89752 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 15524 event pairs, 508 based on Foata normal form. 12/3346 useless extension candidates. Maximal degree in co-relation 24406. Up to 2746 conditions per place. [2024-06-21 22:02:43,058 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 186 selfloop transitions, 96 changer transitions 0/285 dead transitions. [2024-06-21 22:02:43,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 285 transitions, 4078 flow [2024-06-21 22:02:43,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:02:43,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:02:43,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 22:02:43,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 22:02:43,059 INFO L175 Difference]: Start difference. First operand has 169 places, 240 transitions, 3086 flow. Second operand 8 states and 136 transitions. [2024-06-21 22:02:43,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 285 transitions, 4078 flow [2024-06-21 22:02:43,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 285 transitions, 3995 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-21 22:02:43,142 INFO L231 Difference]: Finished difference. Result has 175 places, 256 transitions, 3534 flow [2024-06-21 22:02:43,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3003, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3534, PETRI_PLACES=175, PETRI_TRANSITIONS=256} [2024-06-21 22:02:43,143 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 134 predicate places. [2024-06-21 22:02:43,143 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 256 transitions, 3534 flow [2024-06-21 22:02:43,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:43,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:43,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:43,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 22:02:43,144 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:43,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:43,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1508051381, now seen corresponding path program 6 times [2024-06-21 22:02:43,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:43,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987931415] [2024-06-21 22:02:43,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:43,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:43,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:43,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:43,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:43,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987931415] [2024-06-21 22:02:43,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987931415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:43,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:43,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:02:43,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463937807] [2024-06-21 22:02:43,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:43,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:02:43,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:43,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:02:43,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:02:43,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:02:43,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 256 transitions, 3534 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:43,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:43,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:02:43,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:44,435 INFO L124 PetriNetUnfolderBase]: 2287/3399 cut-off events. [2024-06-21 22:02:44,436 INFO L125 PetriNetUnfolderBase]: For 100424/100426 co-relation queries the response was YES. [2024-06-21 22:02:44,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26496 conditions, 3399 events. 2287/3399 cut-off events. For 100424/100426 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 15878 event pairs, 510 based on Foata normal form. 10/3408 useless extension candidates. Maximal degree in co-relation 26415. Up to 2751 conditions per place. [2024-06-21 22:02:44,466 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 189 selfloop transitions, 99 changer transitions 0/291 dead transitions. [2024-06-21 22:02:44,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 291 transitions, 4442 flow [2024-06-21 22:02:44,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:02:44,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:02:44,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 22:02:44,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428125 [2024-06-21 22:02:44,468 INFO L175 Difference]: Start difference. First operand has 175 places, 256 transitions, 3534 flow. Second operand 8 states and 137 transitions. [2024-06-21 22:02:44,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 291 transitions, 4442 flow [2024-06-21 22:02:44,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 291 transitions, 4333 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-21 22:02:44,581 INFO L231 Difference]: Finished difference. Result has 180 places, 262 transitions, 3765 flow [2024-06-21 22:02:44,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3429, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3765, PETRI_PLACES=180, PETRI_TRANSITIONS=262} [2024-06-21 22:02:44,582 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 139 predicate places. [2024-06-21 22:02:44,582 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 262 transitions, 3765 flow [2024-06-21 22:02:44,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:44,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:44,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:44,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 22:02:44,583 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:44,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:44,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1508045801, now seen corresponding path program 7 times [2024-06-21 22:02:44,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:44,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523058812] [2024-06-21 22:02:44,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:44,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:44,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:45,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:45,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:45,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523058812] [2024-06-21 22:02:45,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523058812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:45,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:45,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:02:45,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301497956] [2024-06-21 22:02:45,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:45,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:02:45,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:45,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:02:45,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:02:45,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:02:45,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 262 transitions, 3765 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:45,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:45,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:02:45,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:45,805 INFO L124 PetriNetUnfolderBase]: 2290/3403 cut-off events. [2024-06-21 22:02:45,805 INFO L125 PetriNetUnfolderBase]: For 105837/105839 co-relation queries the response was YES. [2024-06-21 22:02:45,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27319 conditions, 3403 events. 2290/3403 cut-off events. For 105837/105839 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 15918 event pairs, 542 based on Foata normal form. 6/3408 useless extension candidates. Maximal degree in co-relation 27236. Up to 2754 conditions per place. [2024-06-21 22:02:45,836 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 196 selfloop transitions, 96 changer transitions 0/295 dead transitions. [2024-06-21 22:02:45,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 295 transitions, 4652 flow [2024-06-21 22:02:45,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:02:45,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:02:45,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 22:02:45,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43125 [2024-06-21 22:02:45,838 INFO L175 Difference]: Start difference. First operand has 180 places, 262 transitions, 3765 flow. Second operand 8 states and 138 transitions. [2024-06-21 22:02:45,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 295 transitions, 4652 flow [2024-06-21 22:02:45,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 295 transitions, 4436 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-21 22:02:45,953 INFO L231 Difference]: Finished difference. Result has 183 places, 266 transitions, 3836 flow [2024-06-21 22:02:45,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3553, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3836, PETRI_PLACES=183, PETRI_TRANSITIONS=266} [2024-06-21 22:02:45,954 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 142 predicate places. [2024-06-21 22:02:45,954 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 266 transitions, 3836 flow [2024-06-21 22:02:45,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:45,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:45,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:45,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 22:02:45,955 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:45,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:45,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1871658, now seen corresponding path program 3 times [2024-06-21 22:02:45,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:45,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852050267] [2024-06-21 22:02:45,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:45,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:45,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:46,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:46,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:46,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852050267] [2024-06-21 22:02:46,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852050267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:46,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:46,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:02:46,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346326201] [2024-06-21 22:02:46,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:46,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:02:46,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:46,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:02:46,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:02:46,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:02:46,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 266 transitions, 3836 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:46,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:46,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:02:46,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:47,329 INFO L124 PetriNetUnfolderBase]: 2333/3468 cut-off events. [2024-06-21 22:02:47,330 INFO L125 PetriNetUnfolderBase]: For 112257/112259 co-relation queries the response was YES. [2024-06-21 22:02:47,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27992 conditions, 3468 events. 2333/3468 cut-off events. For 112257/112259 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 16218 event pairs, 503 based on Foata normal form. 4/3468 useless extension candidates. Maximal degree in co-relation 27908. Up to 2683 conditions per place. [2024-06-21 22:02:47,362 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 178 selfloop transitions, 127 changer transitions 0/308 dead transitions. [2024-06-21 22:02:47,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 308 transitions, 4982 flow [2024-06-21 22:02:47,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:02:47,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:02:47,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 22:02:47,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434375 [2024-06-21 22:02:47,364 INFO L175 Difference]: Start difference. First operand has 183 places, 266 transitions, 3836 flow. Second operand 8 states and 139 transitions. [2024-06-21 22:02:47,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 308 transitions, 4982 flow [2024-06-21 22:02:47,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 308 transitions, 4834 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-21 22:02:47,505 INFO L231 Difference]: Finished difference. Result has 189 places, 279 transitions, 4271 flow [2024-06-21 22:02:47,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3688, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4271, PETRI_PLACES=189, PETRI_TRANSITIONS=279} [2024-06-21 22:02:47,505 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 148 predicate places. [2024-06-21 22:02:47,505 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 279 transitions, 4271 flow [2024-06-21 22:02:47,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:47,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:47,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:47,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 22:02:47,506 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:47,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:47,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1085805712, now seen corresponding path program 4 times [2024-06-21 22:02:47,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:47,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986972520] [2024-06-21 22:02:47,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:47,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:47,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:48,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:48,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:48,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986972520] [2024-06-21 22:02:48,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986972520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:48,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:48,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:02:48,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544665754] [2024-06-21 22:02:48,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:48,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:02:48,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:48,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:02:48,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:02:48,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:02:48,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 279 transitions, 4271 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:48,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:48,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:02:48,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:49,036 INFO L124 PetriNetUnfolderBase]: 2344/3491 cut-off events. [2024-06-21 22:02:49,036 INFO L125 PetriNetUnfolderBase]: For 124387/124395 co-relation queries the response was YES. [2024-06-21 22:02:49,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29479 conditions, 3491 events. 2344/3491 cut-off events. For 124387/124395 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 16509 event pairs, 772 based on Foata normal form. 10/3499 useless extension candidates. Maximal degree in co-relation 29392. Up to 3349 conditions per place. [2024-06-21 22:02:49,069 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 261 selfloop transitions, 40 changer transitions 0/304 dead transitions. [2024-06-21 22:02:49,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 304 transitions, 5009 flow [2024-06-21 22:02:49,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:02:49,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:02:49,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-21 22:02:49,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39375 [2024-06-21 22:02:49,070 INFO L175 Difference]: Start difference. First operand has 189 places, 279 transitions, 4271 flow. Second operand 8 states and 126 transitions. [2024-06-21 22:02:49,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 304 transitions, 5009 flow [2024-06-21 22:02:49,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 304 transitions, 4924 flow, removed 29 selfloop flow, removed 2 redundant places. [2024-06-21 22:02:49,230 INFO L231 Difference]: Finished difference. Result has 195 places, 282 transitions, 4330 flow [2024-06-21 22:02:49,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4190, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4330, PETRI_PLACES=195, PETRI_TRANSITIONS=282} [2024-06-21 22:02:49,231 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 154 predicate places. [2024-06-21 22:02:49,231 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 282 transitions, 4330 flow [2024-06-21 22:02:49,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:49,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:49,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:49,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 22:02:49,232 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:49,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:49,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1085805495, now seen corresponding path program 8 times [2024-06-21 22:02:49,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:49,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136291286] [2024-06-21 22:02:49,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:49,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:49,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:49,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:49,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:49,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136291286] [2024-06-21 22:02:49,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136291286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:49,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:49,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:02:49,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483984720] [2024-06-21 22:02:49,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:49,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:02:49,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:49,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:02:49,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:02:49,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:02:49,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 282 transitions, 4330 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:49,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:49,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:02:49,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:50,539 INFO L124 PetriNetUnfolderBase]: 2420/3594 cut-off events. [2024-06-21 22:02:50,540 INFO L125 PetriNetUnfolderBase]: For 134127/134129 co-relation queries the response was YES. [2024-06-21 22:02:50,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30765 conditions, 3594 events. 2420/3594 cut-off events. For 134127/134129 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 16944 event pairs, 507 based on Foata normal form. 10/3600 useless extension candidates. Maximal degree in co-relation 30676. Up to 2678 conditions per place. [2024-06-21 22:02:50,579 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 189 selfloop transitions, 132 changer transitions 0/324 dead transitions. [2024-06-21 22:02:50,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 324 transitions, 5579 flow [2024-06-21 22:02:50,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:02:50,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:02:50,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 22:02:50,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44375 [2024-06-21 22:02:50,581 INFO L175 Difference]: Start difference. First operand has 195 places, 282 transitions, 4330 flow. Second operand 8 states and 142 transitions. [2024-06-21 22:02:50,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 324 transitions, 5579 flow [2024-06-21 22:02:50,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 324 transitions, 5469 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 22:02:50,789 INFO L231 Difference]: Finished difference. Result has 197 places, 294 transitions, 4754 flow [2024-06-21 22:02:50,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4220, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4754, PETRI_PLACES=197, PETRI_TRANSITIONS=294} [2024-06-21 22:02:50,790 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 156 predicate places. [2024-06-21 22:02:50,790 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 294 transitions, 4754 flow [2024-06-21 22:02:50,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:50,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:50,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:50,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 22:02:50,791 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:50,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:50,791 INFO L85 PathProgramCache]: Analyzing trace with hash -9236545, now seen corresponding path program 9 times [2024-06-21 22:02:50,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:50,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019243617] [2024-06-21 22:02:50,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:50,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:50,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:51,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:51,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:51,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019243617] [2024-06-21 22:02:51,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019243617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:51,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:51,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:02:51,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763879774] [2024-06-21 22:02:51,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:51,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:02:51,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:51,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:02:51,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:02:51,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:02:51,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 294 transitions, 4754 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:51,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:51,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:02:51,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:52,096 INFO L124 PetriNetUnfolderBase]: 2442/3626 cut-off events. [2024-06-21 22:02:52,096 INFO L125 PetriNetUnfolderBase]: For 144385/144387 co-relation queries the response was YES. [2024-06-21 22:02:52,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32078 conditions, 3626 events. 2442/3626 cut-off events. For 144385/144387 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 17095 event pairs, 532 based on Foata normal form. 6/3628 useless extension candidates. Maximal degree in co-relation 31988. Up to 2687 conditions per place. [2024-06-21 22:02:52,134 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 200 selfloop transitions, 126 changer transitions 0/329 dead transitions. [2024-06-21 22:02:52,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 329 transitions, 5975 flow [2024-06-21 22:02:52,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:02:52,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:02:52,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 22:02:52,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453125 [2024-06-21 22:02:52,136 INFO L175 Difference]: Start difference. First operand has 197 places, 294 transitions, 4754 flow. Second operand 8 states and 145 transitions. [2024-06-21 22:02:52,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 329 transitions, 5975 flow [2024-06-21 22:02:52,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 329 transitions, 5774 flow, removed 62 selfloop flow, removed 3 redundant places. [2024-06-21 22:02:52,316 INFO L231 Difference]: Finished difference. Result has 202 places, 297 transitions, 4888 flow [2024-06-21 22:02:52,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4553, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4888, PETRI_PLACES=202, PETRI_TRANSITIONS=297} [2024-06-21 22:02:52,317 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 161 predicate places. [2024-06-21 22:02:52,317 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 297 transitions, 4888 flow [2024-06-21 22:02:52,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:52,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:52,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:52,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 22:02:52,318 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:52,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:52,318 INFO L85 PathProgramCache]: Analyzing trace with hash -9230965, now seen corresponding path program 10 times [2024-06-21 22:02:52,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:52,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202729539] [2024-06-21 22:02:52,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:52,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:52,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:52,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:52,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:52,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202729539] [2024-06-21 22:02:52,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202729539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:52,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:52,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:02:52,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098790815] [2024-06-21 22:02:52,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:52,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:02:52,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:52,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:02:52,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:02:52,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:02:52,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 297 transitions, 4888 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:52,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:52,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:02:52,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:53,647 INFO L124 PetriNetUnfolderBase]: 2428/3608 cut-off events. [2024-06-21 22:02:53,647 INFO L125 PetriNetUnfolderBase]: For 146059/146061 co-relation queries the response was YES. [2024-06-21 22:02:53,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31751 conditions, 3608 events. 2428/3608 cut-off events. For 146059/146061 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 17026 event pairs, 535 based on Foata normal form. 10/3614 useless extension candidates. Maximal degree in co-relation 31659. Up to 2683 conditions per place. [2024-06-21 22:02:53,687 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 205 selfloop transitions, 121 changer transitions 0/329 dead transitions. [2024-06-21 22:02:53,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 329 transitions, 6046 flow [2024-06-21 22:02:53,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:02:53,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:02:53,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 22:02:53,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45625 [2024-06-21 22:02:53,690 INFO L175 Difference]: Start difference. First operand has 202 places, 297 transitions, 4888 flow. Second operand 8 states and 146 transitions. [2024-06-21 22:02:53,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 329 transitions, 6046 flow [2024-06-21 22:02:53,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 329 transitions, 5676 flow, removed 84 selfloop flow, removed 4 redundant places. [2024-06-21 22:02:53,893 INFO L231 Difference]: Finished difference. Result has 206 places, 297 transitions, 4772 flow [2024-06-21 22:02:53,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4518, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4772, PETRI_PLACES=206, PETRI_TRANSITIONS=297} [2024-06-21 22:02:53,894 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 165 predicate places. [2024-06-21 22:02:53,894 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 297 transitions, 4772 flow [2024-06-21 22:02:53,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:53,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:53,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:53,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 22:02:53,895 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:53,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:53,895 INFO L85 PathProgramCache]: Analyzing trace with hash -9230748, now seen corresponding path program 5 times [2024-06-21 22:02:53,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:53,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701310313] [2024-06-21 22:02:53,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:53,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:53,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:54,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:54,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:54,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701310313] [2024-06-21 22:02:54,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701310313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:54,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:54,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:02:54,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605475735] [2024-06-21 22:02:54,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:54,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:02:54,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:54,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:02:54,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:02:54,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:02:54,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 297 transitions, 4772 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:54,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:54,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:02:54,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:55,329 INFO L124 PetriNetUnfolderBase]: 2417/3598 cut-off events. [2024-06-21 22:02:55,330 INFO L125 PetriNetUnfolderBase]: For 148699/148707 co-relation queries the response was YES. [2024-06-21 22:02:55,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31290 conditions, 3598 events. 2417/3598 cut-off events. For 148699/148707 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 17156 event pairs, 776 based on Foata normal form. 10/3606 useless extension candidates. Maximal degree in co-relation 31197. Up to 3456 conditions per place. [2024-06-21 22:02:55,368 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 280 selfloop transitions, 38 changer transitions 0/321 dead transitions. [2024-06-21 22:02:55,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 321 transitions, 5532 flow [2024-06-21 22:02:55,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:02:55,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:02:55,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 22:02:55,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396875 [2024-06-21 22:02:55,370 INFO L175 Difference]: Start difference. First operand has 206 places, 297 transitions, 4772 flow. Second operand 8 states and 127 transitions. [2024-06-21 22:02:55,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 321 transitions, 5532 flow [2024-06-21 22:02:55,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 321 transitions, 5253 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 22:02:55,581 INFO L231 Difference]: Finished difference. Result has 209 places, 299 transitions, 4619 flow [2024-06-21 22:02:55,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4497, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4619, PETRI_PLACES=209, PETRI_TRANSITIONS=299} [2024-06-21 22:02:55,582 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 168 predicate places. [2024-06-21 22:02:55,582 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 299 transitions, 4619 flow [2024-06-21 22:02:55,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:55,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:55,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:55,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 22:02:55,583 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:55,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:55,583 INFO L85 PathProgramCache]: Analyzing trace with hash 113105976, now seen corresponding path program 1 times [2024-06-21 22:02:55,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:55,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083877252] [2024-06-21 22:02:55,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:55,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:55,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:56,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:56,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:56,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083877252] [2024-06-21 22:02:56,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083877252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:56,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:56,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:02:56,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743121425] [2024-06-21 22:02:56,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:56,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:02:56,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:56,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:02:56,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:02:56,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 22:02:56,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 299 transitions, 4619 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:56,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:56,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 22:02:56,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:57,294 INFO L124 PetriNetUnfolderBase]: 2372/3557 cut-off events. [2024-06-21 22:02:57,295 INFO L125 PetriNetUnfolderBase]: For 169027/169071 co-relation queries the response was YES. [2024-06-21 22:02:57,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31025 conditions, 3557 events. 2372/3557 cut-off events. For 169027/169071 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 17222 event pairs, 517 based on Foata normal form. 13/3487 useless extension candidates. Maximal degree in co-relation 30931. Up to 3148 conditions per place. [2024-06-21 22:02:57,335 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 220 selfloop transitions, 59 changer transitions 0/337 dead transitions. [2024-06-21 22:02:57,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 337 transitions, 5347 flow [2024-06-21 22:02:57,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:02:57,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:02:57,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 22:02:57,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 22:02:57,337 INFO L175 Difference]: Start difference. First operand has 209 places, 299 transitions, 4619 flow. Second operand 9 states and 153 transitions. [2024-06-21 22:02:57,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 337 transitions, 5347 flow [2024-06-21 22:02:57,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 337 transitions, 5241 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 22:02:57,554 INFO L231 Difference]: Finished difference. Result has 213 places, 304 transitions, 4710 flow [2024-06-21 22:02:57,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4513, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4710, PETRI_PLACES=213, PETRI_TRANSITIONS=304} [2024-06-21 22:02:57,555 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 172 predicate places. [2024-06-21 22:02:57,555 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 304 transitions, 4710 flow [2024-06-21 22:02:57,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:57,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:57,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:57,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 22:02:57,556 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:57,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:57,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1253383342, now seen corresponding path program 2 times [2024-06-21 22:02:57,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:57,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599638528] [2024-06-21 22:02:57,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:57,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:57,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:58,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:58,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:58,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599638528] [2024-06-21 22:02:58,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599638528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:58,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:58,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:02:58,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463728457] [2024-06-21 22:02:58,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:58,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:02:58,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:58,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:02:58,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:02:58,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 22:02:58,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 304 transitions, 4710 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:58,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:58,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 22:02:58,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:58,986 INFO L124 PetriNetUnfolderBase]: 2423/3646 cut-off events. [2024-06-21 22:02:58,986 INFO L125 PetriNetUnfolderBase]: For 176794/176958 co-relation queries the response was YES. [2024-06-21 22:02:59,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32010 conditions, 3646 events. 2423/3646 cut-off events. For 176794/176958 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 17936 event pairs, 669 based on Foata normal form. 25/3581 useless extension candidates. Maximal degree in co-relation 31914. Up to 3253 conditions per place. [2024-06-21 22:02:59,024 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 222 selfloop transitions, 65 changer transitions 0/345 dead transitions. [2024-06-21 22:02:59,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 345 transitions, 5526 flow [2024-06-21 22:02:59,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:02:59,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:02:59,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 22:02:59,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2024-06-21 22:02:59,026 INFO L175 Difference]: Start difference. First operand has 213 places, 304 transitions, 4710 flow. Second operand 9 states and 155 transitions. [2024-06-21 22:02:59,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 345 transitions, 5526 flow [2024-06-21 22:02:59,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 345 transitions, 5317 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-21 22:02:59,273 INFO L231 Difference]: Finished difference. Result has 216 places, 312 transitions, 4784 flow [2024-06-21 22:02:59,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4550, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4784, PETRI_PLACES=216, PETRI_TRANSITIONS=312} [2024-06-21 22:02:59,274 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 175 predicate places. [2024-06-21 22:02:59,274 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 312 transitions, 4784 flow [2024-06-21 22:02:59,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:59,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:59,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:59,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 22:02:59,274 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:59,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:59,275 INFO L85 PathProgramCache]: Analyzing trace with hash -495958280, now seen corresponding path program 1 times [2024-06-21 22:02:59,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:59,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16336316] [2024-06-21 22:02:59,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:59,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:59,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:59,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:59,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:59,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16336316] [2024-06-21 22:02:59,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16336316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:59,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:59,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:02:59,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719945847] [2024-06-21 22:02:59,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:59,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:02:59,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:59,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:02:59,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:03:00,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:03:00,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 312 transitions, 4784 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:00,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:00,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:03:00,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:00,810 INFO L124 PetriNetUnfolderBase]: 2568/3838 cut-off events. [2024-06-21 22:03:00,811 INFO L125 PetriNetUnfolderBase]: For 171064/171068 co-relation queries the response was YES. [2024-06-21 22:03:00,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33168 conditions, 3838 events. 2568/3838 cut-off events. For 171064/171068 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 18824 event pairs, 719 based on Foata normal form. 6/3843 useless extension candidates. Maximal degree in co-relation 33071. Up to 3617 conditions per place. [2024-06-21 22:03:00,851 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 288 selfloop transitions, 58 changer transitions 0/349 dead transitions. [2024-06-21 22:03:00,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 349 transitions, 5725 flow [2024-06-21 22:03:00,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:03:00,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:03:00,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-21 22:03:00,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4111111111111111 [2024-06-21 22:03:00,853 INFO L175 Difference]: Start difference. First operand has 216 places, 312 transitions, 4784 flow. Second operand 9 states and 148 transitions. [2024-06-21 22:03:00,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 349 transitions, 5725 flow [2024-06-21 22:03:01,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 349 transitions, 5575 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 22:03:01,121 INFO L231 Difference]: Finished difference. Result has 220 places, 317 transitions, 4907 flow [2024-06-21 22:03:01,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4634, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4907, PETRI_PLACES=220, PETRI_TRANSITIONS=317} [2024-06-21 22:03:01,122 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 179 predicate places. [2024-06-21 22:03:01,122 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 317 transitions, 4907 flow [2024-06-21 22:03:01,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:01,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:01,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:03:01,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 22:03:01,123 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:01,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:01,123 INFO L85 PathProgramCache]: Analyzing trace with hash -495925854, now seen corresponding path program 3 times [2024-06-21 22:03:01,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:01,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122303101] [2024-06-21 22:03:01,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:01,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:01,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:01,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:01,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:01,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122303101] [2024-06-21 22:03:01,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122303101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:01,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:01,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:03:01,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707819133] [2024-06-21 22:03:01,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:01,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:03:01,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:01,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:03:01,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:03:02,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 22:03:02,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 317 transitions, 4907 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:02,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:02,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 22:03:02,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:02,916 INFO L124 PetriNetUnfolderBase]: 2454/3705 cut-off events. [2024-06-21 22:03:02,917 INFO L125 PetriNetUnfolderBase]: For 198439/198558 co-relation queries the response was YES. [2024-06-21 22:03:02,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33063 conditions, 3705 events. 2454/3705 cut-off events. For 198439/198558 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 18403 event pairs, 647 based on Foata normal form. 18/3634 useless extension candidates. Maximal degree in co-relation 32964. Up to 3287 conditions per place. [2024-06-21 22:03:02,964 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 211 selfloop transitions, 79 changer transitions 0/351 dead transitions. [2024-06-21 22:03:02,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 351 transitions, 5661 flow [2024-06-21 22:03:02,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:03:02,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:03:02,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 22:03:02,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2024-06-21 22:03:02,966 INFO L175 Difference]: Start difference. First operand has 220 places, 317 transitions, 4907 flow. Second operand 9 states and 155 transitions. [2024-06-21 22:03:02,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 351 transitions, 5661 flow [2024-06-21 22:03:03,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 351 transitions, 5567 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-21 22:03:03,245 INFO L231 Difference]: Finished difference. Result has 225 places, 319 transitions, 5035 flow [2024-06-21 22:03:03,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4813, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5035, PETRI_PLACES=225, PETRI_TRANSITIONS=319} [2024-06-21 22:03:03,246 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 184 predicate places. [2024-06-21 22:03:03,246 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 319 transitions, 5035 flow [2024-06-21 22:03:03,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:03,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:03,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:03:03,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 22:03:03,247 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)] === [2024-06-21 22:03:03,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:03,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1741087454, now seen corresponding path program 4 times [2024-06-21 22:03:03,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:03,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392867455] [2024-06-21 22:03:03,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:03,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:03,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:04,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:04,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:04,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392867455] [2024-06-21 22:03:04,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392867455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:04,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:04,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:03:04,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840692021] [2024-06-21 22:03:04,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:04,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:03:04,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:04,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:03:04,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:03:04,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 22:03:04,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 319 transitions, 5035 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:04,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:04,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 22:03:04,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:05,138 INFO L124 PetriNetUnfolderBase]: 2522/3813 cut-off events. [2024-06-21 22:03:05,138 INFO L125 PetriNetUnfolderBase]: For 206012/206161 co-relation queries the response was YES. [2024-06-21 22:03:05,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33906 conditions, 3813 events. 2522/3813 cut-off events. For 206012/206161 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 19140 event pairs, 500 based on Foata normal form. 52/3770 useless extension candidates. Maximal degree in co-relation 33806. Up to 3387 conditions per place. [2024-06-21 22:03:05,177 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 235 selfloop transitions, 66 changer transitions 0/362 dead transitions. [2024-06-21 22:03:05,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 362 transitions, 5866 flow [2024-06-21 22:03:05,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:03:05,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:03:05,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 22:03:05,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-21 22:03:05,179 INFO L175 Difference]: Start difference. First operand has 225 places, 319 transitions, 5035 flow. Second operand 9 states and 156 transitions. [2024-06-21 22:03:05,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 362 transitions, 5866 flow [2024-06-21 22:03:05,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 362 transitions, 5676 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-21 22:03:05,394 INFO L231 Difference]: Finished difference. Result has 228 places, 331 transitions, 5142 flow [2024-06-21 22:03:05,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4845, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5142, PETRI_PLACES=228, PETRI_TRANSITIONS=331} [2024-06-21 22:03:05,395 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 187 predicate places. [2024-06-21 22:03:05,395 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 331 transitions, 5142 flow [2024-06-21 22:03:05,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:05,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:05,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:03:05,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 22:03:05,395 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)] === [2024-06-21 22:03:05,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:05,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1741147904, now seen corresponding path program 5 times [2024-06-21 22:03:05,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:05,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669613315] [2024-06-21 22:03:05,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:05,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:05,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:06,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:06,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:06,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669613315] [2024-06-21 22:03:06,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669613315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:06,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:06,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:03:06,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199936103] [2024-06-21 22:03:06,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:06,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:03:06,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:06,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:03:06,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:03:06,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 22:03:06,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 331 transitions, 5142 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:06,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:06,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 22:03:06,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:07,237 INFO L124 PetriNetUnfolderBase]: 2550/3865 cut-off events. [2024-06-21 22:03:07,237 INFO L125 PetriNetUnfolderBase]: For 218210/218429 co-relation queries the response was YES. [2024-06-21 22:03:07,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34626 conditions, 3865 events. 2550/3865 cut-off events. For 218210/218429 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 19578 event pairs, 510 based on Foata normal form. 50/3814 useless extension candidates. Maximal degree in co-relation 34524. Up to 3437 conditions per place. [2024-06-21 22:03:07,356 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 226 selfloop transitions, 78 changer transitions 0/365 dead transitions. [2024-06-21 22:03:07,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 365 transitions, 5928 flow [2024-06-21 22:03:07,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:03:07,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:03:07,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 22:03:07,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-21 22:03:07,358 INFO L175 Difference]: Start difference. First operand has 228 places, 331 transitions, 5142 flow. Second operand 9 states and 156 transitions. [2024-06-21 22:03:07,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 365 transitions, 5928 flow [2024-06-21 22:03:07,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 365 transitions, 5796 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 22:03:07,627 INFO L231 Difference]: Finished difference. Result has 232 places, 335 transitions, 5252 flow [2024-06-21 22:03:07,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5010, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5252, PETRI_PLACES=232, PETRI_TRANSITIONS=335} [2024-06-21 22:03:07,628 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 191 predicate places. [2024-06-21 22:03:07,628 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 335 transitions, 5252 flow [2024-06-21 22:03:07,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:07,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:07,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:03:07,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 22:03:07,628 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)] === [2024-06-21 22:03:07,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:07,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1741148028, now seen corresponding path program 2 times [2024-06-21 22:03:07,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:07,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858315808] [2024-06-21 22:03:07,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:07,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:07,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:08,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:08,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:08,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858315808] [2024-06-21 22:03:08,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858315808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:08,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:08,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:03:08,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756948507] [2024-06-21 22:03:08,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:08,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:03:08,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:08,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:03:08,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:03:08,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:03:08,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 335 transitions, 5252 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:08,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:08,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:03:08,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:09,324 INFO L124 PetriNetUnfolderBase]: 2763/4138 cut-off events. [2024-06-21 22:03:09,325 INFO L125 PetriNetUnfolderBase]: For 207148/207154 co-relation queries the response was YES. [2024-06-21 22:03:09,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36151 conditions, 4138 events. 2763/4138 cut-off events. For 207148/207154 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 20800 event pairs, 617 based on Foata normal form. 8/4145 useless extension candidates. Maximal degree in co-relation 36048. Up to 3917 conditions per place. [2024-06-21 22:03:09,375 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 307 selfloop transitions, 61 changer transitions 0/371 dead transitions. [2024-06-21 22:03:09,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 371 transitions, 6229 flow [2024-06-21 22:03:09,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:03:09,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:03:09,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-21 22:03:09,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41388888888888886 [2024-06-21 22:03:09,377 INFO L175 Difference]: Start difference. First operand has 232 places, 335 transitions, 5252 flow. Second operand 9 states and 149 transitions. [2024-06-21 22:03:09,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 371 transitions, 6229 flow [2024-06-21 22:03:09,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 371 transitions, 6025 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-21 22:03:09,774 INFO L231 Difference]: Finished difference. Result has 235 places, 341 transitions, 5337 flow [2024-06-21 22:03:09,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5048, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5337, PETRI_PLACES=235, PETRI_TRANSITIONS=341} [2024-06-21 22:03:09,775 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 194 predicate places. [2024-06-21 22:03:09,775 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 341 transitions, 5337 flow [2024-06-21 22:03:09,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:09,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:09,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:03:09,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 22:03:09,776 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)] === [2024-06-21 22:03:09,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:09,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1859235584, now seen corresponding path program 6 times [2024-06-21 22:03:09,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:09,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153364696] [2024-06-21 22:03:09,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:09,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:09,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:10,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:10,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:10,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153364696] [2024-06-21 22:03:10,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153364696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:10,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:10,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:03:10,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075711299] [2024-06-21 22:03:10,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:10,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:03:10,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:10,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:03:10,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:03:10,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 22:03:10,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 341 transitions, 5337 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:10,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:10,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 22:03:10,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:11,484 INFO L124 PetriNetUnfolderBase]: 2572/3895 cut-off events. [2024-06-21 22:03:11,485 INFO L125 PetriNetUnfolderBase]: For 237563/237800 co-relation queries the response was YES. [2024-06-21 22:03:11,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35404 conditions, 3895 events. 2572/3895 cut-off events. For 237563/237800 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 19678 event pairs, 503 based on Foata normal form. 48/3841 useless extension candidates. Maximal degree in co-relation 35299. Up to 3421 conditions per place. [2024-06-21 22:03:11,531 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 216 selfloop transitions, 94 changer transitions 0/374 dead transitions. [2024-06-21 22:03:11,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 374 transitions, 6143 flow [2024-06-21 22:03:11,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:03:11,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:03:11,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 22:03:11,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-21 22:03:11,532 INFO L175 Difference]: Start difference. First operand has 235 places, 341 transitions, 5337 flow. Second operand 9 states and 156 transitions. [2024-06-21 22:03:11,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 374 transitions, 6143 flow [2024-06-21 22:03:11,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 374 transitions, 6039 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 22:03:11,844 INFO L231 Difference]: Finished difference. Result has 239 places, 343 transitions, 5491 flow [2024-06-21 22:03:11,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5233, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5491, PETRI_PLACES=239, PETRI_TRANSITIONS=343} [2024-06-21 22:03:11,845 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 198 predicate places. [2024-06-21 22:03:11,845 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 343 transitions, 5491 flow [2024-06-21 22:03:11,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:11,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:11,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:03:11,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 22:03:11,847 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)] === [2024-06-21 22:03:11,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:11,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1859420282, now seen corresponding path program 1 times [2024-06-21 22:03:11,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:11,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435800042] [2024-06-21 22:03:11,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:11,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:11,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:12,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:12,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:12,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435800042] [2024-06-21 22:03:12,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435800042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:12,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:12,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:03:12,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881740561] [2024-06-21 22:03:12,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:12,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:03:12,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:12,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:03:12,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:03:12,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:03:12,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 343 transitions, 5491 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:12,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:12,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:03:12,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:13,423 INFO L124 PetriNetUnfolderBase]: 2805/4206 cut-off events. [2024-06-21 22:03:13,423 INFO L125 PetriNetUnfolderBase]: For 229812/229816 co-relation queries the response was YES. [2024-06-21 22:03:13,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37272 conditions, 4206 events. 2805/4206 cut-off events. For 229812/229816 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 21263 event pairs, 883 based on Foata normal form. 8/4213 useless extension candidates. Maximal degree in co-relation 37166. Up to 4105 conditions per place. [2024-06-21 22:03:13,471 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 349 selfloop transitions, 26 changer transitions 0/378 dead transitions. [2024-06-21 22:03:13,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 378 transitions, 6409 flow [2024-06-21 22:03:13,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:03:13,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:03:13,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 155 transitions. [2024-06-21 22:03:13,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-06-21 22:03:13,473 INFO L175 Difference]: Start difference. First operand has 239 places, 343 transitions, 5491 flow. Second operand 10 states and 155 transitions. [2024-06-21 22:03:13,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 378 transitions, 6409 flow [2024-06-21 22:03:13,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 378 transitions, 6171 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-21 22:03:13,790 INFO L231 Difference]: Finished difference. Result has 242 places, 345 transitions, 5350 flow [2024-06-21 22:03:13,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5253, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5350, PETRI_PLACES=242, PETRI_TRANSITIONS=345} [2024-06-21 22:03:13,791 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 201 predicate places. [2024-06-21 22:03:13,791 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 345 transitions, 5350 flow [2024-06-21 22:03:13,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:13,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:13,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:03:13,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 22:03:13,791 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:13,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:13,792 INFO L85 PathProgramCache]: Analyzing trace with hash -613372694, now seen corresponding path program 7 times [2024-06-21 22:03:13,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:13,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860133755] [2024-06-21 22:03:13,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:13,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:13,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:14,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:14,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:14,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860133755] [2024-06-21 22:03:14,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860133755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:14,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:14,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:03:14,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388470944] [2024-06-21 22:03:14,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:14,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:03:14,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:14,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:03:14,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:03:14,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 22:03:14,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 345 transitions, 5350 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:14,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:14,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 22:03:14,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:15,613 INFO L124 PetriNetUnfolderBase]: 2724/4135 cut-off events. [2024-06-21 22:03:15,614 INFO L125 PetriNetUnfolderBase]: For 263908/264241 co-relation queries the response was YES. [2024-06-21 22:03:15,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37537 conditions, 4135 events. 2724/4135 cut-off events. For 263908/264241 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 21281 event pairs, 521 based on Foata normal form. 93/4101 useless extension candidates. Maximal degree in co-relation 37430. Up to 3634 conditions per place. [2024-06-21 22:03:15,660 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 257 selfloop transitions, 89 changer transitions 0/411 dead transitions. [2024-06-21 22:03:15,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 411 transitions, 6814 flow [2024-06-21 22:03:15,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:03:15,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:03:15,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-21 22:03:15,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41388888888888886 [2024-06-21 22:03:15,662 INFO L175 Difference]: Start difference. First operand has 242 places, 345 transitions, 5350 flow. Second operand 9 states and 149 transitions. [2024-06-21 22:03:15,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 411 transitions, 6814 flow [2024-06-21 22:03:15,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 411 transitions, 6731 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-21 22:03:15,994 INFO L231 Difference]: Finished difference. Result has 245 places, 381 transitions, 6149 flow [2024-06-21 22:03:15,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5271, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6149, PETRI_PLACES=245, PETRI_TRANSITIONS=381} [2024-06-21 22:03:15,994 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 204 predicate places. [2024-06-21 22:03:15,994 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 381 transitions, 6149 flow [2024-06-21 22:03:15,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:15,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:15,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:03:15,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 22:03:15,995 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:15,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:15,995 INFO L85 PathProgramCache]: Analyzing trace with hash -613312244, now seen corresponding path program 8 times [2024-06-21 22:03:15,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:15,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682034840] [2024-06-21 22:03:15,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:15,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:16,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:16,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:16,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:16,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682034840] [2024-06-21 22:03:16,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682034840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:16,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:16,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:03:16,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038650602] [2024-06-21 22:03:16,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:16,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:03:16,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:16,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:03:16,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:03:16,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 22:03:16,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 381 transitions, 6149 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:16,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:16,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 22:03:16,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:17,807 INFO L124 PetriNetUnfolderBase]: 2750/4199 cut-off events. [2024-06-21 22:03:17,808 INFO L125 PetriNetUnfolderBase]: For 288998/289436 co-relation queries the response was YES. [2024-06-21 22:03:17,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38684 conditions, 4199 events. 2750/4199 cut-off events. For 288998/289436 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 22012 event pairs, 684 based on Foata normal form. 79/4158 useless extension candidates. Maximal degree in co-relation 38574. Up to 3572 conditions per place. [2024-06-21 22:03:17,860 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 225 selfloop transitions, 121 changer transitions 0/411 dead transitions. [2024-06-21 22:03:17,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 411 transitions, 7023 flow [2024-06-21 22:03:17,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:03:17,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:03:17,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 22:03:17,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43125 [2024-06-21 22:03:17,864 INFO L175 Difference]: Start difference. First operand has 245 places, 381 transitions, 6149 flow. Second operand 8 states and 138 transitions. [2024-06-21 22:03:17,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 411 transitions, 7023 flow [2024-06-21 22:03:18,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 411 transitions, 6907 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-21 22:03:18,252 INFO L231 Difference]: Finished difference. Result has 251 places, 383 transitions, 6373 flow [2024-06-21 22:03:18,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6033, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6373, PETRI_PLACES=251, PETRI_TRANSITIONS=383} [2024-06-21 22:03:18,253 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 210 predicate places. [2024-06-21 22:03:18,253 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 383 transitions, 6373 flow [2024-06-21 22:03:18,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:18,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:18,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:03:18,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 22:03:18,254 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:18,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:18,254 INFO L85 PathProgramCache]: Analyzing trace with hash -613312120, now seen corresponding path program 3 times [2024-06-21 22:03:18,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:18,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664393642] [2024-06-21 22:03:18,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:18,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:18,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:18,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:18,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:18,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664393642] [2024-06-21 22:03:18,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664393642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:18,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:18,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:03:18,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059714494] [2024-06-21 22:03:18,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:18,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:03:18,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:18,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:03:18,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:03:19,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:03:19,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 383 transitions, 6373 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:19,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:19,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:03:19,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:19,979 INFO L124 PetriNetUnfolderBase]: 3021/4544 cut-off events. [2024-06-21 22:03:19,979 INFO L125 PetriNetUnfolderBase]: For 262965/262969 co-relation queries the response was YES. [2024-06-21 22:03:20,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40730 conditions, 4544 events. 3021/4544 cut-off events. For 262965/262969 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 23616 event pairs, 838 based on Foata normal form. 6/4549 useless extension candidates. Maximal degree in co-relation 40618. Up to 4159 conditions per place. [2024-06-21 22:03:20,043 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 318 selfloop transitions, 90 changer transitions 0/411 dead transitions. [2024-06-21 22:03:20,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 411 transitions, 7309 flow [2024-06-21 22:03:20,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:03:20,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:03:20,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 22:03:20,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-21 22:03:20,045 INFO L175 Difference]: Start difference. First operand has 251 places, 383 transitions, 6373 flow. Second operand 8 states and 132 transitions. [2024-06-21 22:03:20,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 411 transitions, 7309 flow [2024-06-21 22:03:20,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 411 transitions, 7003 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-21 22:03:20,518 INFO L231 Difference]: Finished difference. Result has 253 places, 383 transitions, 6283 flow [2024-06-21 22:03:20,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6067, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6283, PETRI_PLACES=253, PETRI_TRANSITIONS=383} [2024-06-21 22:03:20,519 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 212 predicate places. [2024-06-21 22:03:20,519 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 383 transitions, 6283 flow [2024-06-21 22:03:20,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:20,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:20,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:03:20,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 22:03:20,519 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:20,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:20,520 INFO L85 PathProgramCache]: Analyzing trace with hash 572609264, now seen corresponding path program 9 times [2024-06-21 22:03:20,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:20,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188361322] [2024-06-21 22:03:20,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:20,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:20,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:21,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:21,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:21,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188361322] [2024-06-21 22:03:21,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188361322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:21,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:21,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:03:21,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479754052] [2024-06-21 22:03:21,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:21,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:03:21,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:21,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:03:21,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:03:21,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 22:03:21,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 383 transitions, 6283 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:21,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:21,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 22:03:21,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:22,387 INFO L124 PetriNetUnfolderBase]: 2749/4180 cut-off events. [2024-06-21 22:03:22,387 INFO L125 PetriNetUnfolderBase]: For 277158/277548 co-relation queries the response was YES. [2024-06-21 22:03:22,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38347 conditions, 4180 events. 2749/4180 cut-off events. For 277158/277548 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 21611 event pairs, 512 based on Foata normal form. 77/4128 useless extension candidates. Maximal degree in co-relation 38234. Up to 3548 conditions per place. [2024-06-21 22:03:22,436 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 217 selfloop transitions, 130 changer transitions 0/412 dead transitions. [2024-06-21 22:03:22,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 412 transitions, 7155 flow [2024-06-21 22:03:22,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:03:22,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:03:22,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 22:03:22,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43125 [2024-06-21 22:03:22,438 INFO L175 Difference]: Start difference. First operand has 253 places, 383 transitions, 6283 flow. Second operand 8 states and 138 transitions. [2024-06-21 22:03:22,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 412 transitions, 7155 flow [2024-06-21 22:03:22,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 412 transitions, 6902 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 22:03:22,849 INFO L231 Difference]: Finished difference. Result has 254 places, 385 transitions, 6368 flow [2024-06-21 22:03:22,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6030, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6368, PETRI_PLACES=254, PETRI_TRANSITIONS=385} [2024-06-21 22:03:22,850 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 213 predicate places. [2024-06-21 22:03:22,850 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 385 transitions, 6368 flow [2024-06-21 22:03:22,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:22,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:22,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:03:22,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 22:03:22,851 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:22,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:22,851 INFO L85 PathProgramCache]: Analyzing trace with hash 572793962, now seen corresponding path program 2 times [2024-06-21 22:03:22,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:22,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399505278] [2024-06-21 22:03:22,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:22,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:22,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:23,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:23,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:23,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399505278] [2024-06-21 22:03:23,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399505278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:23,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:23,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:03:23,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075385778] [2024-06-21 22:03:23,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:23,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:03:23,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:23,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:03:23,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:03:23,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:03:23,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 385 transitions, 6368 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:23,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:23,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:03:23,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:24,711 INFO L124 PetriNetUnfolderBase]: 3138/4723 cut-off events. [2024-06-21 22:03:24,711 INFO L125 PetriNetUnfolderBase]: For 266423/266427 co-relation queries the response was YES. [2024-06-21 22:03:24,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41193 conditions, 4723 events. 3138/4723 cut-off events. For 266423/266427 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 24609 event pairs, 654 based on Foata normal form. 28/4750 useless extension candidates. Maximal degree in co-relation 41079. Up to 3884 conditions per place. [2024-06-21 22:03:24,763 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 294 selfloop transitions, 126 changer transitions 0/423 dead transitions. [2024-06-21 22:03:24,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 423 transitions, 7434 flow [2024-06-21 22:03:24,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:03:24,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:03:24,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-21 22:03:24,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2024-06-21 22:03:24,765 INFO L175 Difference]: Start difference. First operand has 254 places, 385 transitions, 6368 flow. Second operand 9 states and 152 transitions. [2024-06-21 22:03:24,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 423 transitions, 7434 flow [2024-06-21 22:03:25,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 423 transitions, 7120 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-21 22:03:25,195 INFO L231 Difference]: Finished difference. Result has 257 places, 387 transitions, 6361 flow [2024-06-21 22:03:25,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6054, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6361, PETRI_PLACES=257, PETRI_TRANSITIONS=387} [2024-06-21 22:03:25,195 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 216 predicate places. [2024-06-21 22:03:25,196 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 387 transitions, 6361 flow [2024-06-21 22:03:25,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:25,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:25,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:03:25,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 22:03:25,196 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:25,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:25,197 INFO L85 PathProgramCache]: Analyzing trace with hash -699767202, now seen corresponding path program 1 times [2024-06-21 22:03:25,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:25,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003593601] [2024-06-21 22:03:25,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:25,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:25,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:25,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:25,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:25,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003593601] [2024-06-21 22:03:25,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003593601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:25,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:25,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:03:25,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777632434] [2024-06-21 22:03:25,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:25,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:03:25,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:25,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:03:25,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:03:25,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:03:25,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 387 transitions, 6361 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:25,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:25,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:03:25,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:26,933 INFO L124 PetriNetUnfolderBase]: 3128/4712 cut-off events. [2024-06-21 22:03:26,933 INFO L125 PetriNetUnfolderBase]: For 243036/243042 co-relation queries the response was YES. [2024-06-21 22:03:26,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40998 conditions, 4712 events. 3128/4712 cut-off events. For 243036/243042 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 24612 event pairs, 661 based on Foata normal form. 10/4718 useless extension candidates. Maximal degree in co-relation 40883. Up to 4025 conditions per place. [2024-06-21 22:03:26,988 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 268 selfloop transitions, 143 changer transitions 0/414 dead transitions. [2024-06-21 22:03:26,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 414 transitions, 7314 flow [2024-06-21 22:03:26,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:03:26,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:03:26,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-21 22:03:26,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-06-21 22:03:26,990 INFO L175 Difference]: Start difference. First operand has 257 places, 387 transitions, 6361 flow. Second operand 9 states and 147 transitions. [2024-06-21 22:03:26,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 414 transitions, 7314 flow [2024-06-21 22:03:27,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 414 transitions, 7015 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-21 22:03:27,420 INFO L231 Difference]: Finished difference. Result has 259 places, 387 transitions, 6360 flow [2024-06-21 22:03:27,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6062, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6360, PETRI_PLACES=259, PETRI_TRANSITIONS=387} [2024-06-21 22:03:27,421 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 218 predicate places. [2024-06-21 22:03:27,421 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 387 transitions, 6360 flow [2024-06-21 22:03:27,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:27,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:27,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:03:27,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 22:03:27,421 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:27,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:27,422 INFO L85 PathProgramCache]: Analyzing trace with hash -699760444, now seen corresponding path program 3 times [2024-06-21 22:03:27,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:27,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933777748] [2024-06-21 22:03:27,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:27,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:27,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:28,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:28,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:28,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933777748] [2024-06-21 22:03:28,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933777748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:28,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:28,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:03:28,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140431040] [2024-06-21 22:03:28,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:28,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:03:28,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:28,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:03:28,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:03:28,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:03:28,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 387 transitions, 6360 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:28,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:28,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:03:28,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:29,381 INFO L124 PetriNetUnfolderBase]: 3145/4744 cut-off events. [2024-06-21 22:03:29,382 INFO L125 PetriNetUnfolderBase]: For 243710/243718 co-relation queries the response was YES. [2024-06-21 22:03:29,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40847 conditions, 4744 events. 3145/4744 cut-off events. For 243710/243718 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 24975 event pairs, 996 based on Foata normal form. 12/4754 useless extension candidates. Maximal degree in co-relation 40731. Up to 4566 conditions per place. [2024-06-21 22:03:29,443 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 369 selfloop transitions, 44 changer transitions 0/416 dead transitions. [2024-06-21 22:03:29,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 416 transitions, 7340 flow [2024-06-21 22:03:29,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:03:29,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:03:29,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-21 22:03:29,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-21 22:03:29,445 INFO L175 Difference]: Start difference. First operand has 259 places, 387 transitions, 6360 flow. Second operand 9 states and 140 transitions. [2024-06-21 22:03:29,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 416 transitions, 7340 flow [2024-06-21 22:03:29,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 416 transitions, 7087 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 22:03:29,878 INFO L231 Difference]: Finished difference. Result has 262 places, 389 transitions, 6244 flow [2024-06-21 22:03:29,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6107, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6244, PETRI_PLACES=262, PETRI_TRANSITIONS=389} [2024-06-21 22:03:29,879 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 221 predicate places. [2024-06-21 22:03:29,879 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 389 transitions, 6244 flow [2024-06-21 22:03:29,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:29,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:29,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:03:29,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 22:03:29,880 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:29,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:29,880 INFO L85 PathProgramCache]: Analyzing trace with hash -49976976, now seen corresponding path program 4 times [2024-06-21 22:03:29,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:29,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676708085] [2024-06-21 22:03:29,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:29,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:29,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:30,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:30,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:30,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676708085] [2024-06-21 22:03:30,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676708085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:30,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:30,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:03:30,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214521300] [2024-06-21 22:03:30,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:30,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:03:30,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:30,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:03:30,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:03:30,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:03:30,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 389 transitions, 6244 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:30,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:30,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:03:30,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:31,554 INFO L124 PetriNetUnfolderBase]: 3162/4766 cut-off events. [2024-06-21 22:03:31,555 INFO L125 PetriNetUnfolderBase]: For 251486/251492 co-relation queries the response was YES. [2024-06-21 22:03:31,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41040 conditions, 4766 events. 3162/4766 cut-off events. For 251486/251492 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 24974 event pairs, 664 based on Foata normal form. 10/4772 useless extension candidates. Maximal degree in co-relation 40923. Up to 3857 conditions per place. [2024-06-21 22:03:31,707 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 258 selfloop transitions, 162 changer transitions 0/423 dead transitions. [2024-06-21 22:03:31,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 423 transitions, 7440 flow [2024-06-21 22:03:31,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:03:31,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:03:31,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 22:03:31,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41944444444444445 [2024-06-21 22:03:31,709 INFO L175 Difference]: Start difference. First operand has 262 places, 389 transitions, 6244 flow. Second operand 9 states and 151 transitions. [2024-06-21 22:03:31,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 423 transitions, 7440 flow [2024-06-21 22:03:32,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 423 transitions, 7321 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-21 22:03:32,107 INFO L231 Difference]: Finished difference. Result has 264 places, 391 transitions, 6502 flow [2024-06-21 22:03:32,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6125, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6502, PETRI_PLACES=264, PETRI_TRANSITIONS=391} [2024-06-21 22:03:32,108 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 223 predicate places. [2024-06-21 22:03:32,108 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 391 transitions, 6502 flow [2024-06-21 22:03:32,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:32,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:32,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:03:32,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 22:03:32,109 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:32,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:32,110 INFO L85 PathProgramCache]: Analyzing trace with hash -49680306, now seen corresponding path program 5 times [2024-06-21 22:03:32,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:32,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54568646] [2024-06-21 22:03:32,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:32,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:32,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:32,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:32,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:32,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54568646] [2024-06-21 22:03:32,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54568646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:32,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:32,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:03:32,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188431751] [2024-06-21 22:03:32,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:32,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:03:32,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:32,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:03:32,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:03:32,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:03:32,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 391 transitions, 6502 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:32,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:32,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:03:32,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:33,940 INFO L124 PetriNetUnfolderBase]: 3290/4974 cut-off events. [2024-06-21 22:03:33,941 INFO L125 PetriNetUnfolderBase]: For 285702/285708 co-relation queries the response was YES. [2024-06-21 22:03:33,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44115 conditions, 4974 events. 3290/4974 cut-off events. For 285702/285708 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 26281 event pairs, 613 based on Foata normal form. 10/4980 useless extension candidates. Maximal degree in co-relation 43997. Up to 3624 conditions per place. [2024-06-21 22:03:34,000 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 258 selfloop transitions, 173 changer transitions 0/434 dead transitions. [2024-06-21 22:03:34,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 434 transitions, 8008 flow [2024-06-21 22:03:34,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:03:34,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:03:34,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-21 22:03:34,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4388888888888889 [2024-06-21 22:03:34,001 INFO L175 Difference]: Start difference. First operand has 264 places, 391 transitions, 6502 flow. Second operand 9 states and 158 transitions. [2024-06-21 22:03:34,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 434 transitions, 8008 flow [2024-06-21 22:03:34,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 434 transitions, 7694 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-21 22:03:34,478 INFO L231 Difference]: Finished difference. Result has 267 places, 395 transitions, 6637 flow [2024-06-21 22:03:34,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6188, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6637, PETRI_PLACES=267, PETRI_TRANSITIONS=395} [2024-06-21 22:03:34,484 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 226 predicate places. [2024-06-21 22:03:34,484 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 395 transitions, 6637 flow [2024-06-21 22:03:34,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:34,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:34,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:03:34,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 22:03:34,485 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:34,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:34,485 INFO L85 PathProgramCache]: Analyzing trace with hash -286159094, now seen corresponding path program 2 times [2024-06-21 22:03:34,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:34,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267730205] [2024-06-21 22:03:34,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:34,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:34,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:35,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:35,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:35,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267730205] [2024-06-21 22:03:35,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267730205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:35,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:35,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:03:35,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107220438] [2024-06-21 22:03:35,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:35,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:03:35,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:35,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:03:35,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:03:35,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:03:35,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 395 transitions, 6637 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:35,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:35,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:03:35,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:36,163 INFO L124 PetriNetUnfolderBase]: 3280/4960 cut-off events. [2024-06-21 22:03:36,163 INFO L125 PetriNetUnfolderBase]: For 293076/293082 co-relation queries the response was YES. [2024-06-21 22:03:36,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44442 conditions, 4960 events. 3280/4960 cut-off events. For 293076/293082 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 26287 event pairs, 720 based on Foata normal form. 10/4966 useless extension candidates. Maximal degree in co-relation 44323. Up to 4263 conditions per place. [2024-06-21 22:03:36,227 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 291 selfloop transitions, 127 changer transitions 0/421 dead transitions. [2024-06-21 22:03:36,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 421 transitions, 7593 flow [2024-06-21 22:03:36,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:03:36,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:03:36,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 22:03:36,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428125 [2024-06-21 22:03:36,230 INFO L175 Difference]: Start difference. First operand has 267 places, 395 transitions, 6637 flow. Second operand 8 states and 137 transitions. [2024-06-21 22:03:36,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 421 transitions, 7593 flow [2024-06-21 22:03:36,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 421 transitions, 7298 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-21 22:03:36,843 INFO L231 Difference]: Finished difference. Result has 270 places, 395 transitions, 6609 flow [2024-06-21 22:03:36,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6342, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6609, PETRI_PLACES=270, PETRI_TRANSITIONS=395} [2024-06-21 22:03:36,844 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 229 predicate places. [2024-06-21 22:03:36,844 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 395 transitions, 6609 flow [2024-06-21 22:03:36,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:36,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:36,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:03:36,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 22:03:36,845 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:36,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:36,845 INFO L85 PathProgramCache]: Analyzing trace with hash -286337034, now seen corresponding path program 10 times [2024-06-21 22:03:36,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:36,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870926657] [2024-06-21 22:03:36,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:36,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:36,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:37,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:37,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:37,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870926657] [2024-06-21 22:03:37,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870926657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:37,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:37,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:03:37,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971438827] [2024-06-21 22:03:37,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:37,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:03:37,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:37,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:03:37,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:03:37,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 22:03:37,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 395 transitions, 6609 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:37,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:37,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 22:03:37,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:38,714 INFO L124 PetriNetUnfolderBase]: 2945/4523 cut-off events. [2024-06-21 22:03:38,715 INFO L125 PetriNetUnfolderBase]: For 317845/318245 co-relation queries the response was YES. [2024-06-21 22:03:38,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41591 conditions, 4523 events. 2945/4523 cut-off events. For 317845/318245 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 24159 event pairs, 563 based on Foata normal form. 77/4463 useless extension candidates. Maximal degree in co-relation 41470. Up to 3831 conditions per place. [2024-06-21 22:03:38,773 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 216 selfloop transitions, 136 changer transitions 0/422 dead transitions. [2024-06-21 22:03:38,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 422 transitions, 7485 flow [2024-06-21 22:03:38,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:03:38,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:03:38,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 22:03:38,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428125 [2024-06-21 22:03:38,775 INFO L175 Difference]: Start difference. First operand has 270 places, 395 transitions, 6609 flow. Second operand 8 states and 137 transitions. [2024-06-21 22:03:38,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 422 transitions, 7485 flow [2024-06-21 22:03:39,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 422 transitions, 7037 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 22:03:39,253 INFO L231 Difference]: Finished difference. Result has 268 places, 397 transitions, 6507 flow [2024-06-21 22:03:39,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6161, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6507, PETRI_PLACES=268, PETRI_TRANSITIONS=397} [2024-06-21 22:03:39,254 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 227 predicate places. [2024-06-21 22:03:39,254 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 397 transitions, 6507 flow [2024-06-21 22:03:39,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:39,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:39,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:03:39,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 22:03:39,254 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:39,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:39,255 INFO L85 PathProgramCache]: Analyzing trace with hash -286152336, now seen corresponding path program 6 times [2024-06-21 22:03:39,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:39,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610066031] [2024-06-21 22:03:39,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:39,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:39,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:40,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:40,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:40,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610066031] [2024-06-21 22:03:40,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610066031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:40,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:40,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:03:40,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431751690] [2024-06-21 22:03:40,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:40,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:03:40,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:40,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:03:40,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:03:40,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:03:40,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 397 transitions, 6507 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:40,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:40,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:03:40,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:41,100 INFO L124 PetriNetUnfolderBase]: 3259/4934 cut-off events. [2024-06-21 22:03:41,100 INFO L125 PetriNetUnfolderBase]: For 284811/284819 co-relation queries the response was YES. [2024-06-21 22:03:41,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43315 conditions, 4934 events. 3259/4934 cut-off events. For 284811/284819 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 26259 event pairs, 1034 based on Foata normal form. 12/4944 useless extension candidates. Maximal degree in co-relation 43193. Up to 4756 conditions per place. [2024-06-21 22:03:41,163 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 380 selfloop transitions, 42 changer transitions 0/425 dead transitions. [2024-06-21 22:03:41,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 425 transitions, 7489 flow [2024-06-21 22:03:41,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:03:41,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:03:41,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-21 22:03:41,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39166666666666666 [2024-06-21 22:03:41,165 INFO L175 Difference]: Start difference. First operand has 268 places, 397 transitions, 6507 flow. Second operand 9 states and 141 transitions. [2024-06-21 22:03:41,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 425 transitions, 7489 flow [2024-06-21 22:03:41,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 425 transitions, 7163 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-21 22:03:41,665 INFO L231 Difference]: Finished difference. Result has 271 places, 398 transitions, 6296 flow [2024-06-21 22:03:41,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6181, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6296, PETRI_PLACES=271, PETRI_TRANSITIONS=398} [2024-06-21 22:03:41,667 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 230 predicate places. [2024-06-21 22:03:41,667 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 398 transitions, 6296 flow [2024-06-21 22:03:41,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:41,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:41,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:03:41,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 22:03:41,667 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:41,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:41,668 INFO L85 PathProgramCache]: Analyzing trace with hash -788681250, now seen corresponding path program 1 times [2024-06-21 22:03:41,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:41,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762241044] [2024-06-21 22:03:41,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:41,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:41,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:42,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:42,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:42,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762241044] [2024-06-21 22:03:42,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762241044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:42,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:42,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:03:42,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269222190] [2024-06-21 22:03:42,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:42,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:03:42,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:42,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:03:42,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:03:42,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:03:42,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 398 transitions, 6296 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:42,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:42,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:03:42,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:43,792 INFO L124 PetriNetUnfolderBase]: 3276/4961 cut-off events. [2024-06-21 22:03:43,792 INFO L125 PetriNetUnfolderBase]: For 292039/292045 co-relation queries the response was YES. [2024-06-21 22:03:43,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43224 conditions, 4961 events. 3276/4961 cut-off events. For 292039/292045 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 26467 event pairs, 642 based on Foata normal form. 10/4970 useless extension candidates. Maximal degree in co-relation 43101. Up to 4558 conditions per place. [2024-06-21 22:03:43,850 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 389 selfloop transitions, 63 changer transitions 0/455 dead transitions. [2024-06-21 22:03:43,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 455 transitions, 7628 flow [2024-06-21 22:03:43,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:03:43,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:03:43,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-06-21 22:03:43,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3975 [2024-06-21 22:03:43,851 INFO L175 Difference]: Start difference. First operand has 271 places, 398 transitions, 6296 flow. Second operand 10 states and 159 transitions. [2024-06-21 22:03:43,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 455 transitions, 7628 flow [2024-06-21 22:03:44,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 455 transitions, 7509 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-21 22:03:44,370 INFO L231 Difference]: Finished difference. Result has 277 places, 417 transitions, 6659 flow [2024-06-21 22:03:44,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6177, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6659, PETRI_PLACES=277, PETRI_TRANSITIONS=417} [2024-06-21 22:03:44,371 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 236 predicate places. [2024-06-21 22:03:44,371 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 417 transitions, 6659 flow [2024-06-21 22:03:44,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:44,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:44,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:03:44,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 22:03:44,372 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:44,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:44,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1748076050, now seen corresponding path program 2 times [2024-06-21 22:03:44,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:44,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440350234] [2024-06-21 22:03:44,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:44,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:44,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:45,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:45,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:45,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440350234] [2024-06-21 22:03:45,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440350234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:45,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:45,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:03:45,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604250832] [2024-06-21 22:03:45,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:45,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:03:45,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:45,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:03:45,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:03:45,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:03:45,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 417 transitions, 6659 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:45,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:45,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:03:45,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:46,423 INFO L124 PetriNetUnfolderBase]: 3304/4999 cut-off events. [2024-06-21 22:03:46,423 INFO L125 PetriNetUnfolderBase]: For 302156/302162 co-relation queries the response was YES. [2024-06-21 22:03:46,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44288 conditions, 4999 events. 3304/4999 cut-off events. For 302156/302162 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 26681 event pairs, 870 based on Foata normal form. 10/5008 useless extension candidates. Maximal degree in co-relation 44161. Up to 4687 conditions per place. [2024-06-21 22:03:46,478 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 399 selfloop transitions, 64 changer transitions 0/466 dead transitions. [2024-06-21 22:03:46,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 466 transitions, 7969 flow [2024-06-21 22:03:46,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:03:46,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:03:46,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-21 22:03:46,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025 [2024-06-21 22:03:46,480 INFO L175 Difference]: Start difference. First operand has 277 places, 417 transitions, 6659 flow. Second operand 10 states and 161 transitions. [2024-06-21 22:03:46,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 466 transitions, 7969 flow [2024-06-21 22:03:47,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 466 transitions, 7704 flow, removed 108 selfloop flow, removed 4 redundant places. [2024-06-21 22:03:47,038 INFO L231 Difference]: Finished difference. Result has 285 places, 428 transitions, 6810 flow [2024-06-21 22:03:47,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6502, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6810, PETRI_PLACES=285, PETRI_TRANSITIONS=428} [2024-06-21 22:03:47,039 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 244 predicate places. [2024-06-21 22:03:47,039 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 428 transitions, 6810 flow [2024-06-21 22:03:47,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:47,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:47,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:03:47,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 22:03:47,040 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:47,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:47,040 INFO L85 PathProgramCache]: Analyzing trace with hash 257262128, now seen corresponding path program 3 times [2024-06-21 22:03:47,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:47,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597443351] [2024-06-21 22:03:47,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:47,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:47,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:47,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:47,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:47,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597443351] [2024-06-21 22:03:47,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597443351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:47,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:47,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:03:47,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345455281] [2024-06-21 22:03:47,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:47,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:03:47,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:47,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:03:47,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:03:48,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:03:48,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 428 transitions, 6810 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:48,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:48,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:03:48,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:49,309 INFO L124 PetriNetUnfolderBase]: 3346/5071 cut-off events. [2024-06-21 22:03:49,309 INFO L125 PetriNetUnfolderBase]: For 315740/315744 co-relation queries the response was YES. [2024-06-21 22:03:49,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45012 conditions, 5071 events. 3346/5071 cut-off events. For 315740/315744 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 27178 event pairs, 881 based on Foata normal form. 8/5078 useless extension candidates. Maximal degree in co-relation 44881. Up to 4714 conditions per place. [2024-06-21 22:03:49,364 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 396 selfloop transitions, 74 changer transitions 0/473 dead transitions. [2024-06-21 22:03:49,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 473 transitions, 8222 flow [2024-06-21 22:03:49,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:03:49,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:03:49,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-21 22:03:49,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-21 22:03:49,372 INFO L175 Difference]: Start difference. First operand has 285 places, 428 transitions, 6810 flow. Second operand 10 states and 165 transitions. [2024-06-21 22:03:49,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 473 transitions, 8222 flow [2024-06-21 22:03:49,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 473 transitions, 8116 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-21 22:03:49,899 INFO L231 Difference]: Finished difference. Result has 292 places, 434 transitions, 7004 flow [2024-06-21 22:03:49,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6704, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7004, PETRI_PLACES=292, PETRI_TRANSITIONS=434} [2024-06-21 22:03:49,900 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 251 predicate places. [2024-06-21 22:03:49,900 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 434 transitions, 7004 flow [2024-06-21 22:03:49,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:49,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:49,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:03:49,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 22:03:49,901 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:49,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:49,901 INFO L85 PathProgramCache]: Analyzing trace with hash 746093120, now seen corresponding path program 4 times [2024-06-21 22:03:49,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:49,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501251165] [2024-06-21 22:03:49,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:49,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:49,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:50,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:50,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:50,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501251165] [2024-06-21 22:03:50,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501251165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:50,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:50,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:03:50,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3950630] [2024-06-21 22:03:50,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:50,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:03:50,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:50,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:03:50,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:03:50,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:03:50,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 434 transitions, 7004 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:50,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:50,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:03:50,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:51,977 INFO L124 PetriNetUnfolderBase]: 3338/5063 cut-off events. [2024-06-21 22:03:51,977 INFO L125 PetriNetUnfolderBase]: For 322570/322574 co-relation queries the response was YES. [2024-06-21 22:03:52,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45155 conditions, 5063 events. 3338/5063 cut-off events. For 322570/322574 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 27195 event pairs, 896 based on Foata normal form. 8/5070 useless extension candidates. Maximal degree in co-relation 45021. Up to 4773 conditions per place. [2024-06-21 22:03:52,056 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 395 selfloop transitions, 74 changer transitions 0/472 dead transitions. [2024-06-21 22:03:52,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 472 transitions, 8125 flow [2024-06-21 22:03:52,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:03:52,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:03:52,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-21 22:03:52,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.405 [2024-06-21 22:03:52,059 INFO L175 Difference]: Start difference. First operand has 292 places, 434 transitions, 7004 flow. Second operand 10 states and 162 transitions. [2024-06-21 22:03:52,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 472 transitions, 8125 flow [2024-06-21 22:03:52,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 472 transitions, 7912 flow, removed 63 selfloop flow, removed 6 redundant places. [2024-06-21 22:03:52,839 INFO L231 Difference]: Finished difference. Result has 296 places, 435 transitions, 6982 flow [2024-06-21 22:03:52,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6817, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6982, PETRI_PLACES=296, PETRI_TRANSITIONS=435} [2024-06-21 22:03:52,840 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 255 predicate places. [2024-06-21 22:03:52,840 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 435 transitions, 6982 flow [2024-06-21 22:03:52,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:52,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:52,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:03:52,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 22:03:52,841 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:52,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:52,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1860862984, now seen corresponding path program 5 times [2024-06-21 22:03:52,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:52,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857691453] [2024-06-21 22:03:52,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:52,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:52,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:53,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:53,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:53,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857691453] [2024-06-21 22:03:53,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857691453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:53,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:53,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:03:53,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364655363] [2024-06-21 22:03:53,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:53,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:03:53,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:53,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:03:53,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:03:53,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:03:53,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 435 transitions, 6982 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:53,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:53,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:03:53,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:55,181 INFO L124 PetriNetUnfolderBase]: 3377/5112 cut-off events. [2024-06-21 22:03:55,181 INFO L125 PetriNetUnfolderBase]: For 331591/331599 co-relation queries the response was YES. [2024-06-21 22:03:55,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45539 conditions, 5112 events. 3377/5112 cut-off events. For 331591/331599 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 27416 event pairs, 657 based on Foata normal form. 12/5123 useless extension candidates. Maximal degree in co-relation 45403. Up to 4795 conditions per place. [2024-06-21 22:03:55,253 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 416 selfloop transitions, 66 changer transitions 0/485 dead transitions. [2024-06-21 22:03:55,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 485 transitions, 8253 flow [2024-06-21 22:03:55,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:03:55,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:03:55,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-21 22:03:55,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.405 [2024-06-21 22:03:55,254 INFO L175 Difference]: Start difference. First operand has 296 places, 435 transitions, 6982 flow. Second operand 10 states and 162 transitions. [2024-06-21 22:03:55,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 485 transitions, 8253 flow [2024-06-21 22:03:55,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 485 transitions, 8111 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 22:03:55,982 INFO L231 Difference]: Finished difference. Result has 300 places, 449 transitions, 7205 flow [2024-06-21 22:03:55,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6840, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7205, PETRI_PLACES=300, PETRI_TRANSITIONS=449} [2024-06-21 22:03:55,983 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 259 predicate places. [2024-06-21 22:03:55,983 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 449 transitions, 7205 flow [2024-06-21 22:03:55,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:55,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:55,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:03:55,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 22:03:55,984 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:55,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:55,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1858985314, now seen corresponding path program 6 times [2024-06-21 22:03:55,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:55,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52583163] [2024-06-21 22:03:55,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:55,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:55,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:56,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:56,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:56,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52583163] [2024-06-21 22:03:56,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52583163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:56,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:56,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:03:56,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337149085] [2024-06-21 22:03:56,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:56,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:03:56,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:56,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:03:56,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:03:57,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:03:57,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 449 transitions, 7205 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:57,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:57,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:03:57,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:58,198 INFO L124 PetriNetUnfolderBase]: 3405/5158 cut-off events. [2024-06-21 22:03:58,198 INFO L125 PetriNetUnfolderBase]: For 344706/344714 co-relation queries the response was YES. [2024-06-21 22:03:58,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46457 conditions, 5158 events. 3405/5158 cut-off events. For 344706/344714 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 27654 event pairs, 701 based on Foata normal form. 12/5169 useless extension candidates. Maximal degree in co-relation 46318. Up to 4871 conditions per place. [2024-06-21 22:03:58,265 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 411 selfloop transitions, 74 changer transitions 0/488 dead transitions. [2024-06-21 22:03:58,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 488 transitions, 8391 flow [2024-06-21 22:03:58,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:03:58,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:03:58,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-21 22:03:58,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4075 [2024-06-21 22:03:58,266 INFO L175 Difference]: Start difference. First operand has 300 places, 449 transitions, 7205 flow. Second operand 10 states and 163 transitions. [2024-06-21 22:03:58,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 488 transitions, 8391 flow [2024-06-21 22:03:58,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 488 transitions, 8283 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-21 22:03:59,004 INFO L231 Difference]: Finished difference. Result has 306 places, 453 transitions, 7341 flow [2024-06-21 22:03:59,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7097, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7341, PETRI_PLACES=306, PETRI_TRANSITIONS=453} [2024-06-21 22:03:59,009 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 265 predicate places. [2024-06-21 22:03:59,009 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 453 transitions, 7341 flow [2024-06-21 22:03:59,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:59,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:59,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:03:59,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 22:03:59,009 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:59,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:59,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1858989034, now seen corresponding path program 7 times [2024-06-21 22:03:59,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:59,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142928515] [2024-06-21 22:03:59,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:59,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:59,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:59,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:59,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:59,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142928515] [2024-06-21 22:03:59,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142928515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:59,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:59,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:03:59,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382034353] [2024-06-21 22:03:59,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:59,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:03:59,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:59,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:03:59,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:03:59,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:03:59,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 453 transitions, 7341 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:59,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:59,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:03:59,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:01,223 INFO L124 PetriNetUnfolderBase]: 3433/5200 cut-off events. [2024-06-21 22:04:01,224 INFO L125 PetriNetUnfolderBase]: For 357999/358007 co-relation queries the response was YES. [2024-06-21 22:04:01,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47213 conditions, 5200 events. 3433/5200 cut-off events. For 357999/358007 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 27942 event pairs, 697 based on Foata normal form. 12/5211 useless extension candidates. Maximal degree in co-relation 47072. Up to 4843 conditions per place. [2024-06-21 22:04:01,300 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 414 selfloop transitions, 78 changer transitions 0/495 dead transitions. [2024-06-21 22:04:01,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 495 transitions, 8586 flow [2024-06-21 22:04:01,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:04:01,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:04:01,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-21 22:04:01,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41 [2024-06-21 22:04:01,302 INFO L175 Difference]: Start difference. First operand has 306 places, 453 transitions, 7341 flow. Second operand 10 states and 164 transitions. [2024-06-21 22:04:01,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 495 transitions, 8586 flow [2024-06-21 22:04:01,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 495 transitions, 8408 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-21 22:04:01,939 INFO L231 Difference]: Finished difference. Result has 310 places, 460 transitions, 7482 flow [2024-06-21 22:04:01,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7163, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7482, PETRI_PLACES=310, PETRI_TRANSITIONS=460} [2024-06-21 22:04:01,939 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 269 predicate places. [2024-06-21 22:04:01,939 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 460 transitions, 7482 flow [2024-06-21 22:04:01,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:01,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:01,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:01,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 22:04:01,940 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:01,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:01,941 INFO L85 PathProgramCache]: Analyzing trace with hash -911659404, now seen corresponding path program 8 times [2024-06-21 22:04:01,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:01,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719845773] [2024-06-21 22:04:01,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:01,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:01,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:02,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:02,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:02,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719845773] [2024-06-21 22:04:02,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719845773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:02,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:02,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:04:02,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924685475] [2024-06-21 22:04:02,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:02,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:04:02,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:02,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:04:02,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:04:02,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:04:02,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 460 transitions, 7482 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:02,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:02,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:04:02,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:04,284 INFO L124 PetriNetUnfolderBase]: 3450/5228 cut-off events. [2024-06-21 22:04:04,285 INFO L125 PetriNetUnfolderBase]: For 373211/373219 co-relation queries the response was YES. [2024-06-21 22:04:04,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47851 conditions, 5228 events. 3450/5228 cut-off events. For 373211/373219 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 28090 event pairs, 687 based on Foata normal form. 12/5239 useless extension candidates. Maximal degree in co-relation 47708. Up to 4716 conditions per place. [2024-06-21 22:04:04,352 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 403 selfloop transitions, 92 changer transitions 0/498 dead transitions. [2024-06-21 22:04:04,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 498 transitions, 8694 flow [2024-06-21 22:04:04,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:04:04,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:04:04,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-21 22:04:04,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4175 [2024-06-21 22:04:04,353 INFO L175 Difference]: Start difference. First operand has 310 places, 460 transitions, 7482 flow. Second operand 10 states and 167 transitions. [2024-06-21 22:04:04,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 498 transitions, 8694 flow [2024-06-21 22:04:05,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 498 transitions, 8506 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-21 22:04:05,080 INFO L231 Difference]: Finished difference. Result has 313 places, 462 transitions, 7559 flow [2024-06-21 22:04:05,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7294, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7559, PETRI_PLACES=313, PETRI_TRANSITIONS=462} [2024-06-21 22:04:05,081 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 272 predicate places. [2024-06-21 22:04:05,081 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 462 transitions, 7559 flow [2024-06-21 22:04:05,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:05,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:05,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:05,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 22:04:05,081 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:05,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:05,082 INFO L85 PathProgramCache]: Analyzing trace with hash 253831724, now seen corresponding path program 9 times [2024-06-21 22:04:05,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:05,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123491224] [2024-06-21 22:04:05,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:05,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:05,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:05,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:05,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:05,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123491224] [2024-06-21 22:04:05,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123491224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:05,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:05,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:04:05,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002276418] [2024-06-21 22:04:05,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:05,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:04:05,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:05,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:04:05,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:04:05,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:04:05,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 462 transitions, 7559 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:05,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:05,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:04:05,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:07,318 INFO L124 PetriNetUnfolderBase]: 3603/5474 cut-off events. [2024-06-21 22:04:07,319 INFO L125 PetriNetUnfolderBase]: For 425879/425887 co-relation queries the response was YES. [2024-06-21 22:04:07,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51598 conditions, 5474 events. 3603/5474 cut-off events. For 425879/425887 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 29802 event pairs, 734 based on Foata normal form. 12/5485 useless extension candidates. Maximal degree in co-relation 51453. Up to 4732 conditions per place. [2024-06-21 22:04:07,382 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 410 selfloop transitions, 96 changer transitions 0/509 dead transitions. [2024-06-21 22:04:07,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 509 transitions, 9145 flow [2024-06-21 22:04:07,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:04:07,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:04:07,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-21 22:04:07,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325 [2024-06-21 22:04:07,384 INFO L175 Difference]: Start difference. First operand has 313 places, 462 transitions, 7559 flow. Second operand 10 states and 173 transitions. [2024-06-21 22:04:07,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 509 transitions, 9145 flow [2024-06-21 22:04:08,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 509 transitions, 8898 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-21 22:04:08,143 INFO L231 Difference]: Finished difference. Result has 316 places, 467 transitions, 7681 flow [2024-06-21 22:04:08,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7312, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7681, PETRI_PLACES=316, PETRI_TRANSITIONS=467} [2024-06-21 22:04:08,144 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 275 predicate places. [2024-06-21 22:04:08,144 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 467 transitions, 7681 flow [2024-06-21 22:04:08,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:08,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:08,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:08,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 22:04:08,144 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:08,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:08,145 INFO L85 PathProgramCache]: Analyzing trace with hash -905945112, now seen corresponding path program 1 times [2024-06-21 22:04:08,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:08,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139442446] [2024-06-21 22:04:08,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:08,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:08,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:08,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:08,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:08,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139442446] [2024-06-21 22:04:08,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139442446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:08,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:08,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:04:08,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015684618] [2024-06-21 22:04:08,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:08,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:04:08,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:08,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:04:08,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:04:08,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:04:08,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 467 transitions, 7681 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:08,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:08,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:04:08,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:10,045 INFO L124 PetriNetUnfolderBase]: 3559/5406 cut-off events. [2024-06-21 22:04:10,045 INFO L125 PetriNetUnfolderBase]: For 432806/432814 co-relation queries the response was YES. [2024-06-21 22:04:10,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50054 conditions, 5406 events. 3559/5406 cut-off events. For 432806/432814 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 29330 event pairs, 703 based on Foata normal form. 32/5437 useless extension candidates. Maximal degree in co-relation 49907. Up to 4775 conditions per place. [2024-06-21 22:04:10,121 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 408 selfloop transitions, 97 changer transitions 0/508 dead transitions. [2024-06-21 22:04:10,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 508 transitions, 8932 flow [2024-06-21 22:04:10,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:04:10,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:04:10,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-21 22:04:10,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 22:04:10,123 INFO L175 Difference]: Start difference. First operand has 316 places, 467 transitions, 7681 flow. Second operand 10 states and 170 transitions. [2024-06-21 22:04:10,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 508 transitions, 8932 flow [2024-06-21 22:04:10,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 508 transitions, 8673 flow, removed 72 selfloop flow, removed 6 redundant places. [2024-06-21 22:04:10,987 INFO L231 Difference]: Finished difference. Result has 320 places, 468 transitions, 7668 flow [2024-06-21 22:04:10,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7446, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7668, PETRI_PLACES=320, PETRI_TRANSITIONS=468} [2024-06-21 22:04:10,988 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 279 predicate places. [2024-06-21 22:04:10,988 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 468 transitions, 7668 flow [2024-06-21 22:04:10,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:10,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:10,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:10,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 22:04:10,989 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:10,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:10,989 INFO L85 PathProgramCache]: Analyzing trace with hash -905937672, now seen corresponding path program 2 times [2024-06-21 22:04:10,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:10,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250573623] [2024-06-21 22:04:10,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:10,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:10,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:11,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:11,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:11,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250573623] [2024-06-21 22:04:11,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250573623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:11,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:11,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:04:11,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970784640] [2024-06-21 22:04:11,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:11,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:04:11,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:11,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:04:11,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:04:11,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:04:11,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 468 transitions, 7668 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:11,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:11,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:04:11,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:13,042 INFO L124 PetriNetUnfolderBase]: 3753/5732 cut-off events. [2024-06-21 22:04:13,042 INFO L125 PetriNetUnfolderBase]: For 451979/451987 co-relation queries the response was YES. [2024-06-21 22:04:13,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52623 conditions, 5732 events. 3753/5732 cut-off events. For 451979/451987 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 31823 event pairs, 736 based on Foata normal form. 24/5755 useless extension candidates. Maximal degree in co-relation 52474. Up to 4663 conditions per place. [2024-06-21 22:04:13,129 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 411 selfloop transitions, 102 changer transitions 0/516 dead transitions. [2024-06-21 22:04:13,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 516 transitions, 9254 flow [2024-06-21 22:04:13,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:04:13,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:04:13,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-21 22:04:13,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325 [2024-06-21 22:04:13,131 INFO L175 Difference]: Start difference. First operand has 320 places, 468 transitions, 7668 flow. Second operand 10 states and 173 transitions. [2024-06-21 22:04:13,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 516 transitions, 9254 flow [2024-06-21 22:04:14,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 516 transitions, 9096 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 22:04:14,082 INFO L231 Difference]: Finished difference. Result has 324 places, 471 transitions, 7844 flow [2024-06-21 22:04:14,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7510, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7844, PETRI_PLACES=324, PETRI_TRANSITIONS=471} [2024-06-21 22:04:14,084 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 283 predicate places. [2024-06-21 22:04:14,084 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 471 transitions, 7844 flow [2024-06-21 22:04:14,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:14,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:14,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:14,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 22:04:14,084 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:14,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:14,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1073613691, now seen corresponding path program 1 times [2024-06-21 22:04:14,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:14,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042850973] [2024-06-21 22:04:14,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:14,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:14,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:14,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:14,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:14,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042850973] [2024-06-21 22:04:14,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042850973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:14,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:14,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:04:14,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770776021] [2024-06-21 22:04:14,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:14,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:04:14,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:14,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:04:14,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:04:14,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:04:14,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 471 transitions, 7844 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:14,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:14,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:04:14,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:15,959 INFO L124 PetriNetUnfolderBase]: 3763/5750 cut-off events. [2024-06-21 22:04:15,959 INFO L125 PetriNetUnfolderBase]: For 446961/446965 co-relation queries the response was YES. [2024-06-21 22:04:16,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53218 conditions, 5750 events. 3763/5750 cut-off events. For 446961/446965 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 32183 event pairs, 1140 based on Foata normal form. 6/5755 useless extension candidates. Maximal degree in co-relation 53067. Up to 5646 conditions per place. [2024-06-21 22:04:16,038 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 459 selfloop transitions, 36 changer transitions 0/498 dead transitions. [2024-06-21 22:04:16,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 498 transitions, 9108 flow [2024-06-21 22:04:16,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:04:16,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:04:16,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-21 22:04:16,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 22:04:16,040 INFO L175 Difference]: Start difference. First operand has 324 places, 471 transitions, 7844 flow. Second operand 8 states and 128 transitions. [2024-06-21 22:04:16,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 498 transitions, 9108 flow [2024-06-21 22:04:17,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 498 transitions, 8947 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 22:04:17,066 INFO L231 Difference]: Finished difference. Result has 326 places, 477 transitions, 7852 flow [2024-06-21 22:04:17,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7683, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7852, PETRI_PLACES=326, PETRI_TRANSITIONS=477} [2024-06-21 22:04:17,066 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 285 predicate places. [2024-06-21 22:04:17,067 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 477 transitions, 7852 flow [2024-06-21 22:04:17,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:17,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:17,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:17,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 22:04:17,067 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:17,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:17,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1203394056, now seen corresponding path program 10 times [2024-06-21 22:04:17,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:17,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050556213] [2024-06-21 22:04:17,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:17,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:17,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:17,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:17,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:17,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050556213] [2024-06-21 22:04:17,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050556213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:17,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:17,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:04:17,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855219965] [2024-06-21 22:04:17,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:17,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:04:17,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:17,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:04:17,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:04:17,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:04:17,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 477 transitions, 7852 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:17,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:17,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:04:17,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:19,382 INFO L124 PetriNetUnfolderBase]: 3780/5775 cut-off events. [2024-06-21 22:04:19,382 INFO L125 PetriNetUnfolderBase]: For 463473/463481 co-relation queries the response was YES. [2024-06-21 22:04:19,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53649 conditions, 5775 events. 3780/5775 cut-off events. For 463473/463481 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 32188 event pairs, 789 based on Foata normal form. 12/5786 useless extension candidates. Maximal degree in co-relation 53496. Up to 5162 conditions per place. [2024-06-21 22:04:19,465 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 421 selfloop transitions, 90 changer transitions 0/514 dead transitions. [2024-06-21 22:04:19,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 514 transitions, 9138 flow [2024-06-21 22:04:19,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:04:19,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:04:19,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-21 22:04:19,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 22:04:19,466 INFO L175 Difference]: Start difference. First operand has 326 places, 477 transitions, 7852 flow. Second operand 9 states and 144 transitions. [2024-06-21 22:04:19,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 514 transitions, 9138 flow [2024-06-21 22:04:20,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 514 transitions, 9055 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 22:04:20,503 INFO L231 Difference]: Finished difference. Result has 331 places, 481 transitions, 8142 flow [2024-06-21 22:04:20,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7769, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8142, PETRI_PLACES=331, PETRI_TRANSITIONS=481} [2024-06-21 22:04:20,503 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 290 predicate places. [2024-06-21 22:04:20,503 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 481 transitions, 8142 flow [2024-06-21 22:04:20,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:20,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:20,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:20,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 22:04:20,504 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:20,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:20,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1749688980, now seen corresponding path program 11 times [2024-06-21 22:04:20,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:20,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51011094] [2024-06-21 22:04:20,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:20,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:20,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:21,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:21,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:21,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51011094] [2024-06-21 22:04:21,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51011094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:21,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:21,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:04:21,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058922303] [2024-06-21 22:04:21,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:21,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:04:21,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:21,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:04:21,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:04:21,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:04:21,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 481 transitions, 8142 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:21,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:21,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:04:21,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:23,054 INFO L124 PetriNetUnfolderBase]: 3903/5956 cut-off events. [2024-06-21 22:04:23,054 INFO L125 PetriNetUnfolderBase]: For 479342/479350 co-relation queries the response was YES. [2024-06-21 22:04:23,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56790 conditions, 5956 events. 3903/5956 cut-off events. For 479342/479350 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 33326 event pairs, 804 based on Foata normal form. 12/5964 useless extension candidates. Maximal degree in co-relation 56635. Up to 5629 conditions per place. [2024-06-21 22:04:23,131 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 455 selfloop transitions, 90 changer transitions 0/548 dead transitions. [2024-06-21 22:04:23,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 548 transitions, 10373 flow [2024-06-21 22:04:23,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:04:23,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:04:23,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 156 transitions. [2024-06-21 22:04:23,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39 [2024-06-21 22:04:23,133 INFO L175 Difference]: Start difference. First operand has 331 places, 481 transitions, 8142 flow. Second operand 10 states and 156 transitions. [2024-06-21 22:04:23,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 548 transitions, 10373 flow [2024-06-21 22:04:24,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 548 transitions, 10161 flow, removed 67 selfloop flow, removed 5 redundant places. [2024-06-21 22:04:24,311 INFO L231 Difference]: Finished difference. Result has 338 places, 516 transitions, 9223 flow [2024-06-21 22:04:24,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7947, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9223, PETRI_PLACES=338, PETRI_TRANSITIONS=516} [2024-06-21 22:04:24,311 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 297 predicate places. [2024-06-21 22:04:24,311 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 516 transitions, 9223 flow [2024-06-21 22:04:24,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:24,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:24,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:24,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 22:04:24,312 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:24,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:24,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1832809590, now seen corresponding path program 12 times [2024-06-21 22:04:24,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:24,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016679497] [2024-06-21 22:04:24,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:24,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:24,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:25,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:25,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:25,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016679497] [2024-06-21 22:04:25,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016679497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:25,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:25,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:04:25,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981928957] [2024-06-21 22:04:25,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:25,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:04:25,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:25,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:04:25,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:04:25,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:04:25,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 516 transitions, 9223 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:25,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:25,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:04:25,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:26,826 INFO L124 PetriNetUnfolderBase]: 3920/5991 cut-off events. [2024-06-21 22:04:26,826 INFO L125 PetriNetUnfolderBase]: For 451347/451351 co-relation queries the response was YES. [2024-06-21 22:04:26,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56644 conditions, 5991 events. 3920/5991 cut-off events. For 451347/451351 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 33784 event pairs, 994 based on Foata normal form. 8/5998 useless extension candidates. Maximal degree in co-relation 56485. Up to 5270 conditions per place. [2024-06-21 22:04:26,907 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 415 selfloop transitions, 135 changer transitions 0/553 dead transitions. [2024-06-21 22:04:26,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 553 transitions, 10583 flow [2024-06-21 22:04:26,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:04:26,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:04:26,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-21 22:04:26,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-06-21 22:04:26,913 INFO L175 Difference]: Start difference. First operand has 338 places, 516 transitions, 9223 flow. Second operand 9 states and 147 transitions. [2024-06-21 22:04:26,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 553 transitions, 10583 flow [2024-06-21 22:04:28,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 553 transitions, 10304 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-21 22:04:28,044 INFO L231 Difference]: Finished difference. Result has 341 places, 520 transitions, 9404 flow [2024-06-21 22:04:28,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8944, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9404, PETRI_PLACES=341, PETRI_TRANSITIONS=520} [2024-06-21 22:04:28,045 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 300 predicate places. [2024-06-21 22:04:28,045 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 520 transitions, 9404 flow [2024-06-21 22:04:28,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:28,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:28,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:28,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 22:04:28,046 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:28,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:28,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1833418740, now seen corresponding path program 13 times [2024-06-21 22:04:28,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:28,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044163135] [2024-06-21 22:04:28,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:28,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:28,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:28,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:28,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:28,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044163135] [2024-06-21 22:04:28,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044163135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:28,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:28,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:04:28,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575764978] [2024-06-21 22:04:28,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:28,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:04:28,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:28,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:04:28,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:04:28,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:04:28,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 520 transitions, 9404 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:28,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:28,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:04:28,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:30,628 INFO L124 PetriNetUnfolderBase]: 4012/6133 cut-off events. [2024-06-21 22:04:30,628 INFO L125 PetriNetUnfolderBase]: For 504442/504450 co-relation queries the response was YES. [2024-06-21 22:04:30,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58437 conditions, 6133 events. 4012/6133 cut-off events. For 504442/504450 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 34622 event pairs, 762 based on Foata normal form. 32/6164 useless extension candidates. Maximal degree in co-relation 58276. Up to 5081 conditions per place. [2024-06-21 22:04:30,720 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 408 selfloop transitions, 147 changer transitions 0/558 dead transitions. [2024-06-21 22:04:30,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 558 transitions, 10782 flow [2024-06-21 22:04:30,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:04:30,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:04:30,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 22:04:30,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 22:04:30,722 INFO L175 Difference]: Start difference. First operand has 341 places, 520 transitions, 9404 flow. Second operand 9 states and 153 transitions. [2024-06-21 22:04:30,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 558 transitions, 10782 flow [2024-06-21 22:04:31,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 558 transitions, 10546 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-21 22:04:31,984 INFO L231 Difference]: Finished difference. Result has 344 places, 522 transitions, 9560 flow [2024-06-21 22:04:31,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9170, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9560, PETRI_PLACES=344, PETRI_TRANSITIONS=522} [2024-06-21 22:04:31,984 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 303 predicate places. [2024-06-21 22:04:31,984 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 522 transitions, 9560 flow [2024-06-21 22:04:31,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:31,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:31,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:31,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 22:04:31,985 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:31,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:31,985 INFO L85 PathProgramCache]: Analyzing trace with hash 576744242, now seen corresponding path program 3 times [2024-06-21 22:04:31,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:31,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171908699] [2024-06-21 22:04:31,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:31,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:31,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:32,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:32,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:32,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171908699] [2024-06-21 22:04:32,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171908699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:32,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:32,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:04:32,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072039607] [2024-06-21 22:04:32,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:32,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:04:32,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:32,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:04:32,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:04:32,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:04:32,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 522 transitions, 9560 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:32,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:32,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:04:32,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:34,338 INFO L124 PetriNetUnfolderBase]: 4156/6373 cut-off events. [2024-06-21 22:04:34,338 INFO L125 PetriNetUnfolderBase]: For 512159/512167 co-relation queries the response was YES. [2024-06-21 22:04:34,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61425 conditions, 6373 events. 4156/6373 cut-off events. For 512159/512167 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 36291 event pairs, 772 based on Foata normal form. 24/6396 useless extension candidates. Maximal degree in co-relation 61263. Up to 4449 conditions per place. [2024-06-21 22:04:34,440 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 408 selfloop transitions, 155 changer transitions 0/566 dead transitions. [2024-06-21 22:04:34,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 566 transitions, 11264 flow [2024-06-21 22:04:34,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:04:34,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:04:34,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 22:04:34,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-21 22:04:34,442 INFO L175 Difference]: Start difference. First operand has 344 places, 522 transitions, 9560 flow. Second operand 9 states and 156 transitions. [2024-06-21 22:04:34,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 566 transitions, 11264 flow [2024-06-21 22:04:35,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 566 transitions, 10928 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-21 22:04:35,710 INFO L231 Difference]: Finished difference. Result has 346 places, 524 transitions, 9632 flow [2024-06-21 22:04:35,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9224, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9632, PETRI_PLACES=346, PETRI_TRANSITIONS=524} [2024-06-21 22:04:35,712 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 305 predicate places. [2024-06-21 22:04:35,712 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 524 transitions, 9632 flow [2024-06-21 22:04:35,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:35,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:35,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:35,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 22:04:35,713 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:35,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:35,714 INFO L85 PathProgramCache]: Analyzing trace with hash 571022510, now seen corresponding path program 14 times [2024-06-21 22:04:35,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:35,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192714329] [2024-06-21 22:04:35,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:35,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:35,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:36,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:36,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:36,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192714329] [2024-06-21 22:04:36,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192714329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:36,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:36,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:04:36,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296445249] [2024-06-21 22:04:36,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:36,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:04:36,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:36,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:04:36,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:04:36,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:04:36,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 524 transitions, 9632 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:36,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:36,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:04:36,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:38,312 INFO L124 PetriNetUnfolderBase]: 4148/6361 cut-off events. [2024-06-21 22:04:38,312 INFO L125 PetriNetUnfolderBase]: For 496547/496555 co-relation queries the response was YES. [2024-06-21 22:04:38,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61073 conditions, 6361 events. 4148/6361 cut-off events. For 496547/496555 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 36426 event pairs, 840 based on Foata normal form. 12/6372 useless extension candidates. Maximal degree in co-relation 60910. Up to 5549 conditions per place. [2024-06-21 22:04:38,403 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 418 selfloop transitions, 137 changer transitions 0/558 dead transitions. [2024-06-21 22:04:38,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 558 transitions, 10966 flow [2024-06-21 22:04:38,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:04:38,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:04:38,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-21 22:04:38,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 22:04:38,405 INFO L175 Difference]: Start difference. First operand has 346 places, 524 transitions, 9632 flow. Second operand 9 states and 150 transitions. [2024-06-21 22:04:38,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 558 transitions, 10966 flow [2024-06-21 22:04:39,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 558 transitions, 10751 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-21 22:04:39,493 INFO L231 Difference]: Finished difference. Result has 349 places, 526 transitions, 9789 flow [2024-06-21 22:04:39,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9419, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9789, PETRI_PLACES=349, PETRI_TRANSITIONS=526} [2024-06-21 22:04:39,493 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 308 predicate places. [2024-06-21 22:04:39,494 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 526 transitions, 9789 flow [2024-06-21 22:04:39,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:39,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:39,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:39,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 22:04:39,494 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:39,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:39,495 INFO L85 PathProgramCache]: Analyzing trace with hash 571018790, now seen corresponding path program 15 times [2024-06-21 22:04:39,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:39,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331949478] [2024-06-21 22:04:39,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:39,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:39,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:40,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:40,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:40,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331949478] [2024-06-21 22:04:40,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331949478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:40,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:40,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:04:40,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094709865] [2024-06-21 22:04:40,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:40,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:04:40,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:40,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:04:40,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:04:40,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:04:40,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 526 transitions, 9789 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:40,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:40,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:04:40,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:42,024 INFO L124 PetriNetUnfolderBase]: 4165/6388 cut-off events. [2024-06-21 22:04:42,025 INFO L125 PetriNetUnfolderBase]: For 497597/497605 co-relation queries the response was YES. [2024-06-21 22:04:42,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61660 conditions, 6388 events. 4165/6388 cut-off events. For 497597/497605 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 36604 event pairs, 836 based on Foata normal form. 12/6399 useless extension candidates. Maximal degree in co-relation 61496. Up to 5218 conditions per place. [2024-06-21 22:04:42,128 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 416 selfloop transitions, 147 changer transitions 0/566 dead transitions. [2024-06-21 22:04:42,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 566 transitions, 11237 flow [2024-06-21 22:04:42,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:04:42,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:04:42,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 22:04:42,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2024-06-21 22:04:42,129 INFO L175 Difference]: Start difference. First operand has 349 places, 526 transitions, 9789 flow. Second operand 9 states and 154 transitions. [2024-06-21 22:04:42,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 566 transitions, 11237 flow [2024-06-21 22:04:43,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 566 transitions, 10903 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-21 22:04:43,328 INFO L231 Difference]: Finished difference. Result has 352 places, 530 transitions, 9925 flow [2024-06-21 22:04:43,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9455, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9925, PETRI_PLACES=352, PETRI_TRANSITIONS=530} [2024-06-21 22:04:43,329 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 311 predicate places. [2024-06-21 22:04:43,329 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 530 transitions, 9925 flow [2024-06-21 22:04:43,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:43,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:43,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:43,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 22:04:43,329 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:43,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:43,330 INFO L85 PathProgramCache]: Analyzing trace with hash 333522463, now seen corresponding path program 2 times [2024-06-21 22:04:43,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:43,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703968502] [2024-06-21 22:04:43,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:43,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:43,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:43,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:43,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:43,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703968502] [2024-06-21 22:04:43,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703968502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:43,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:43,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:04:43,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265909566] [2024-06-21 22:04:43,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:43,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:04:43,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:43,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:04:43,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:04:43,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:04:43,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 530 transitions, 9925 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:43,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:43,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:04:43,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:45,555 INFO L124 PetriNetUnfolderBase]: 4180/6413 cut-off events. [2024-06-21 22:04:45,556 INFO L125 PetriNetUnfolderBase]: For 511010/511014 co-relation queries the response was YES. [2024-06-21 22:04:45,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62251 conditions, 6413 events. 4180/6413 cut-off events. For 511010/511014 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 36941 event pairs, 1241 based on Foata normal form. 6/6418 useless extension candidates. Maximal degree in co-relation 62085. Up to 6302 conditions per place. [2024-06-21 22:04:45,654 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 508 selfloop transitions, 42 changer transitions 0/553 dead transitions. [2024-06-21 22:04:45,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 553 transitions, 11303 flow [2024-06-21 22:04:45,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:04:45,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:04:45,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-21 22:04:45,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035714285714286 [2024-06-21 22:04:45,655 INFO L175 Difference]: Start difference. First operand has 352 places, 530 transitions, 9925 flow. Second operand 7 states and 113 transitions. [2024-06-21 22:04:45,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 553 transitions, 11303 flow [2024-06-21 22:04:46,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 553 transitions, 11031 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-21 22:04:46,709 INFO L231 Difference]: Finished difference. Result has 354 places, 536 transitions, 9860 flow [2024-06-21 22:04:46,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9655, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9860, PETRI_PLACES=354, PETRI_TRANSITIONS=536} [2024-06-21 22:04:46,709 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 313 predicate places. [2024-06-21 22:04:46,710 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 536 transitions, 9860 flow [2024-06-21 22:04:46,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:46,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:46,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:46,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 22:04:46,710 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:46,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:46,711 INFO L85 PathProgramCache]: Analyzing trace with hash 243724276, now seen corresponding path program 16 times [2024-06-21 22:04:46,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:46,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084288503] [2024-06-21 22:04:46,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:46,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:46,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:47,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:47,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:47,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084288503] [2024-06-21 22:04:47,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084288503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:47,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:47,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:04:47,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469613267] [2024-06-21 22:04:47,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:47,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:04:47,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:47,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:04:47,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:04:47,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:04:47,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 536 transitions, 9860 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:47,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:47,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:04:47,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:49,446 INFO L124 PetriNetUnfolderBase]: 4272/6564 cut-off events. [2024-06-21 22:04:49,447 INFO L125 PetriNetUnfolderBase]: For 546564/546574 co-relation queries the response was YES. [2024-06-21 22:04:49,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63223 conditions, 6564 events. 4272/6564 cut-off events. For 546564/546574 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 37919 event pairs, 851 based on Foata normal form. 34/6594 useless extension candidates. Maximal degree in co-relation 63055. Up to 5392 conditions per place. [2024-06-21 22:04:49,542 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 405 selfloop transitions, 166 changer transitions 0/574 dead transitions. [2024-06-21 22:04:49,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 574 transitions, 11291 flow [2024-06-21 22:04:49,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:04:49,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:04:49,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-21 22:04:49,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4225 [2024-06-21 22:04:49,543 INFO L175 Difference]: Start difference. First operand has 354 places, 536 transitions, 9860 flow. Second operand 10 states and 169 transitions. [2024-06-21 22:04:49,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 574 transitions, 11291 flow [2024-06-21 22:04:50,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 574 transitions, 11201 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-21 22:04:50,689 INFO L231 Difference]: Finished difference. Result has 360 places, 538 transitions, 10205 flow [2024-06-21 22:04:50,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9770, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10205, PETRI_PLACES=360, PETRI_TRANSITIONS=538} [2024-06-21 22:04:50,689 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 319 predicate places. [2024-06-21 22:04:50,690 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 538 transitions, 10205 flow [2024-06-21 22:04:50,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:50,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:50,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:50,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 22:04:50,690 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:50,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:50,691 INFO L85 PathProgramCache]: Analyzing trace with hash 243730228, now seen corresponding path program 4 times [2024-06-21 22:04:50,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:50,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380721581] [2024-06-21 22:04:50,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:50,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:50,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:51,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:51,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:51,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380721581] [2024-06-21 22:04:51,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380721581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:51,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:51,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:04:51,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88443837] [2024-06-21 22:04:51,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:51,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:04:51,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:51,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:04:51,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:04:51,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:04:51,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 538 transitions, 10205 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:51,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:51,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:04:51,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:53,417 INFO L124 PetriNetUnfolderBase]: 4410/6792 cut-off events. [2024-06-21 22:04:53,418 INFO L125 PetriNetUnfolderBase]: For 569646/569656 co-relation queries the response was YES. [2024-06-21 22:04:53,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65395 conditions, 6792 events. 4410/6792 cut-off events. For 569646/569656 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 39597 event pairs, 873 based on Foata normal form. 42/6830 useless extension candidates. Maximal degree in co-relation 65227. Up to 5418 conditions per place. [2024-06-21 22:04:53,515 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 414 selfloop transitions, 166 changer transitions 0/583 dead transitions. [2024-06-21 22:04:53,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 583 transitions, 11682 flow [2024-06-21 22:04:53,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:04:53,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:04:53,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-21 22:04:53,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325 [2024-06-21 22:04:53,517 INFO L175 Difference]: Start difference. First operand has 360 places, 538 transitions, 10205 flow. Second operand 10 states and 173 transitions. [2024-06-21 22:04:53,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 583 transitions, 11682 flow [2024-06-21 22:04:54,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 583 transitions, 11279 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-21 22:04:54,605 INFO L231 Difference]: Finished difference. Result has 362 places, 543 transitions, 10255 flow [2024-06-21 22:04:54,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9808, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10255, PETRI_PLACES=362, PETRI_TRANSITIONS=543} [2024-06-21 22:04:54,605 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 321 predicate places. [2024-06-21 22:04:54,605 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 543 transitions, 10255 flow [2024-06-21 22:04:54,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:54,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:54,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:54,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 22:04:54,606 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:54,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:54,606 INFO L85 PathProgramCache]: Analyzing trace with hash -286508952, now seen corresponding path program 17 times [2024-06-21 22:04:54,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:54,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907555639] [2024-06-21 22:04:54,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:54,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:54,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:55,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:55,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:55,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907555639] [2024-06-21 22:04:55,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907555639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:55,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:55,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:04:55,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213544643] [2024-06-21 22:04:55,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:55,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:04:55,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:55,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:04:55,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:04:55,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:04:55,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 543 transitions, 10255 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:55,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:55,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:04:55,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:57,571 INFO L124 PetriNetUnfolderBase]: 4427/6819 cut-off events. [2024-06-21 22:04:57,571 INFO L125 PetriNetUnfolderBase]: For 536527/536537 co-relation queries the response was YES. [2024-06-21 22:04:57,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65567 conditions, 6819 events. 4427/6819 cut-off events. For 536527/536537 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 39821 event pairs, 873 based on Foata normal form. 14/6829 useless extension candidates. Maximal degree in co-relation 65398. Up to 5754 conditions per place. [2024-06-21 22:04:57,660 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 403 selfloop transitions, 170 changer transitions 0/576 dead transitions. [2024-06-21 22:04:57,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 576 transitions, 11637 flow [2024-06-21 22:04:57,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:04:57,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:04:57,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 22:04:57,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 22:04:57,661 INFO L175 Difference]: Start difference. First operand has 362 places, 543 transitions, 10255 flow. Second operand 9 states and 153 transitions. [2024-06-21 22:04:57,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 576 transitions, 11637 flow [2024-06-21 22:04:58,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 576 transitions, 11281 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 22:04:58,802 INFO L231 Difference]: Finished difference. Result has 365 places, 545 transitions, 10346 flow [2024-06-21 22:04:58,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9899, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10346, PETRI_PLACES=365, PETRI_TRANSITIONS=545} [2024-06-21 22:04:58,802 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 324 predicate places. [2024-06-21 22:04:58,803 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 545 transitions, 10346 flow [2024-06-21 22:04:58,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:58,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:58,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:58,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 22:04:58,803 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:58,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:58,804 INFO L85 PathProgramCache]: Analyzing trace with hash 243939478, now seen corresponding path program 5 times [2024-06-21 22:04:58,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:58,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682169079] [2024-06-21 22:04:58,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:58,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:58,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:59,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:59,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:59,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682169079] [2024-06-21 22:04:59,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682169079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:59,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:59,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:04:59,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645894719] [2024-06-21 22:04:59,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:59,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:04:59,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:59,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:04:59,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:04:59,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:04:59,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 545 transitions, 10346 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:59,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:59,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:04:59,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:01,258 INFO L124 PetriNetUnfolderBase]: 4657/7201 cut-off events. [2024-06-21 22:05:01,258 INFO L125 PetriNetUnfolderBase]: For 636168/636178 co-relation queries the response was YES. [2024-06-21 22:05:01,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70318 conditions, 7201 events. 4657/7201 cut-off events. For 636168/636178 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 42683 event pairs, 940 based on Foata normal form. 26/7223 useless extension candidates. Maximal degree in co-relation 70148. Up to 5438 conditions per place. [2024-06-21 22:05:01,373 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 416 selfloop transitions, 169 changer transitions 0/588 dead transitions. [2024-06-21 22:05:01,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 588 transitions, 12118 flow [2024-06-21 22:05:01,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:05:01,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:05:01,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 22:05:01,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44722222222222224 [2024-06-21 22:05:01,374 INFO L175 Difference]: Start difference. First operand has 365 places, 545 transitions, 10346 flow. Second operand 9 states and 161 transitions. [2024-06-21 22:05:01,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 588 transitions, 12118 flow [2024-06-21 22:05:02,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 588 transitions, 11689 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-21 22:05:02,750 INFO L231 Difference]: Finished difference. Result has 368 places, 548 transitions, 10416 flow [2024-06-21 22:05:02,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9917, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10416, PETRI_PLACES=368, PETRI_TRANSITIONS=548} [2024-06-21 22:05:02,751 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 327 predicate places. [2024-06-21 22:05:02,751 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 548 transitions, 10416 flow [2024-06-21 22:05:02,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:02,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:02,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:02,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 22:05:02,752 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:05:02,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:02,753 INFO L85 PathProgramCache]: Analyzing trace with hash -286512672, now seen corresponding path program 18 times [2024-06-21 22:05:02,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:02,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41529700] [2024-06-21 22:05:02,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:02,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:02,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:03,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:03,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:03,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41529700] [2024-06-21 22:05:03,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41529700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:03,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:03,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:05:03,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752707936] [2024-06-21 22:05:03,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:03,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:05:03,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:03,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:05:03,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:05:03,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:05:03,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 548 transitions, 10416 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:03,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:03,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:05:03,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:05,595 INFO L124 PetriNetUnfolderBase]: 4785/7409 cut-off events. [2024-06-21 22:05:05,595 INFO L125 PetriNetUnfolderBase]: For 684558/684568 co-relation queries the response was YES. [2024-06-21 22:05:05,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73713 conditions, 7409 events. 4785/7409 cut-off events. For 684558/684568 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 44354 event pairs, 966 based on Foata normal form. 14/7419 useless extension candidates. Maximal degree in co-relation 73541. Up to 5975 conditions per place. [2024-06-21 22:05:05,715 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 411 selfloop transitions, 176 changer transitions 0/590 dead transitions. [2024-06-21 22:05:05,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 590 transitions, 12236 flow [2024-06-21 22:05:05,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:05:05,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:05:05,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 22:05:05,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-21 22:05:05,716 INFO L175 Difference]: Start difference. First operand has 368 places, 548 transitions, 10416 flow. Second operand 9 states and 159 transitions. [2024-06-21 22:05:05,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 590 transitions, 12236 flow [2024-06-21 22:05:07,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 590 transitions, 11990 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-21 22:05:07,273 INFO L231 Difference]: Finished difference. Result has 373 places, 553 transitions, 10758 flow [2024-06-21 22:05:07,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10170, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10758, PETRI_PLACES=373, PETRI_TRANSITIONS=553} [2024-06-21 22:05:07,274 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 332 predicate places. [2024-06-21 22:05:07,274 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 553 transitions, 10758 flow [2024-06-21 22:05:07,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:07,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:07,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:07,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 22:05:07,275 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:05:07,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:07,276 INFO L85 PathProgramCache]: Analyzing trace with hash -286358850, now seen corresponding path program 6 times [2024-06-21 22:05:07,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:07,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055800646] [2024-06-21 22:05:07,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:07,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:07,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:08,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:08,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:08,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055800646] [2024-06-21 22:05:08,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055800646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:08,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:08,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:05:08,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94293693] [2024-06-21 22:05:08,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:08,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:05:08,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:08,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:05:08,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:05:08,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:05:08,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 553 transitions, 10758 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:08,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:08,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:05:08,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:10,230 INFO L124 PetriNetUnfolderBase]: 4729/7321 cut-off events. [2024-06-21 22:05:10,231 INFO L125 PetriNetUnfolderBase]: For 688923/688933 co-relation queries the response was YES. [2024-06-21 22:05:10,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71876 conditions, 7321 events. 4729/7321 cut-off events. For 688923/688933 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 43696 event pairs, 946 based on Foata normal form. 42/7359 useless extension candidates. Maximal degree in co-relation 71701. Up to 6067 conditions per place. [2024-06-21 22:05:10,350 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 419 selfloop transitions, 171 changer transitions 0/593 dead transitions. [2024-06-21 22:05:10,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 593 transitions, 12150 flow [2024-06-21 22:05:10,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:05:10,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:05:10,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-21 22:05:10,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43 [2024-06-21 22:05:10,352 INFO L175 Difference]: Start difference. First operand has 373 places, 553 transitions, 10758 flow. Second operand 10 states and 172 transitions. [2024-06-21 22:05:10,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 593 transitions, 12150 flow [2024-06-21 22:05:12,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 593 transitions, 11712 flow, removed 78 selfloop flow, removed 6 redundant places. [2024-06-21 22:05:12,042 INFO L231 Difference]: Finished difference. Result has 377 places, 553 transitions, 10672 flow [2024-06-21 22:05:12,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10320, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10672, PETRI_PLACES=377, PETRI_TRANSITIONS=553} [2024-06-21 22:05:12,043 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 336 predicate places. [2024-06-21 22:05:12,043 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 553 transitions, 10672 flow [2024-06-21 22:05:12,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:12,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:12,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:12,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 22:05:12,044 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:05:12,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:12,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1806001364, now seen corresponding path program 19 times [2024-06-21 22:05:12,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:12,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190965581] [2024-06-21 22:05:12,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:12,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:12,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:13,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:13,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:13,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190965581] [2024-06-21 22:05:13,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190965581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:13,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:13,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:05:13,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179566796] [2024-06-21 22:05:13,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:13,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:05:13,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:13,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:05:13,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:05:13,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:05:13,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 553 transitions, 10672 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:13,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:13,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:05:13,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:14,904 INFO L124 PetriNetUnfolderBase]: 4685/7253 cut-off events. [2024-06-21 22:05:14,904 INFO L125 PetriNetUnfolderBase]: For 625165/625175 co-relation queries the response was YES. [2024-06-21 22:05:14,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69216 conditions, 7253 events. 4685/7253 cut-off events. For 625165/625175 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 43340 event pairs, 899 based on Foata normal form. 34/7283 useless extension candidates. Maximal degree in co-relation 69040. Up to 6068 conditions per place. [2024-06-21 22:05:15,022 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 401 selfloop transitions, 186 changer transitions 0/590 dead transitions. [2024-06-21 22:05:15,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 590 transitions, 12084 flow [2024-06-21 22:05:15,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:05:15,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:05:15,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-21 22:05:15,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4175 [2024-06-21 22:05:15,024 INFO L175 Difference]: Start difference. First operand has 377 places, 553 transitions, 10672 flow. Second operand 10 states and 167 transitions. [2024-06-21 22:05:15,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 590 transitions, 12084 flow [2024-06-21 22:05:16,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 590 transitions, 11639 flow, removed 34 selfloop flow, removed 11 redundant places. [2024-06-21 22:05:16,510 INFO L231 Difference]: Finished difference. Result has 376 places, 554 transitions, 10649 flow [2024-06-21 22:05:16,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10243, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10649, PETRI_PLACES=376, PETRI_TRANSITIONS=554} [2024-06-21 22:05:16,511 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 335 predicate places. [2024-06-21 22:05:16,511 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 554 transitions, 10649 flow [2024-06-21 22:05:16,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:16,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:16,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:16,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 22:05:16,512 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:05:16,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:16,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1549026182, now seen corresponding path program 7 times [2024-06-21 22:05:16,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:16,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190491826] [2024-06-21 22:05:16,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:16,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:16,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:17,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:17,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:17,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190491826] [2024-06-21 22:05:17,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190491826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:17,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:17,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:05:17,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265085335] [2024-06-21 22:05:17,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:17,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:05:17,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:17,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:05:17,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:05:17,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:05:17,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 554 transitions, 10649 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:17,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:17,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:05:17,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:19,201 INFO L124 PetriNetUnfolderBase]: 4804/7454 cut-off events. [2024-06-21 22:05:19,202 INFO L125 PetriNetUnfolderBase]: For 654244/654254 co-relation queries the response was YES. [2024-06-21 22:05:19,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71501 conditions, 7454 events. 4804/7454 cut-off events. For 654244/654254 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 44554 event pairs, 868 based on Foata normal form. 26/7476 useless extension candidates. Maximal degree in co-relation 71325. Up to 3971 conditions per place. [2024-06-21 22:05:19,319 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 381 selfloop transitions, 213 changer transitions 0/597 dead transitions. [2024-06-21 22:05:19,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 597 transitions, 12444 flow [2024-06-21 22:05:19,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:05:19,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:05:19,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-21 22:05:19,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42 [2024-06-21 22:05:19,320 INFO L175 Difference]: Start difference. First operand has 376 places, 554 transitions, 10649 flow. Second operand 10 states and 168 transitions. [2024-06-21 22:05:19,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 597 transitions, 12444 flow [2024-06-21 22:05:20,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 597 transitions, 12065 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 22:05:20,660 INFO L231 Difference]: Finished difference. Result has 378 places, 556 transitions, 10820 flow [2024-06-21 22:05:20,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10270, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10820, PETRI_PLACES=378, PETRI_TRANSITIONS=556} [2024-06-21 22:05:20,661 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 337 predicate places. [2024-06-21 22:05:20,661 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 556 transitions, 10820 flow [2024-06-21 22:05:20,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:20,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:20,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:20,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 22:05:20,662 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:05:20,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:20,662 INFO L85 PathProgramCache]: Analyzing trace with hash -210586840, now seen corresponding path program 8 times [2024-06-21 22:05:20,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:20,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191987278] [2024-06-21 22:05:20,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:20,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:20,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:21,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:21,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:21,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191987278] [2024-06-21 22:05:21,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191987278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:21,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:21,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:05:21,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990303985] [2024-06-21 22:05:21,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:21,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:05:21,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:21,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:05:21,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:05:21,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:05:21,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 556 transitions, 10820 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:21,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:21,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:05:21,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:23,312 INFO L124 PetriNetUnfolderBase]: 4812/7474 cut-off events. [2024-06-21 22:05:23,313 INFO L125 PetriNetUnfolderBase]: For 659239/659249 co-relation queries the response was YES. [2024-06-21 22:05:23,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71648 conditions, 7474 events. 4812/7474 cut-off events. For 659239/659249 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 45104 event pairs, 933 based on Foata normal form. 26/7496 useless extension candidates. Maximal degree in co-relation 71471. Up to 5890 conditions per place. [2024-06-21 22:05:23,423 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 410 selfloop transitions, 184 changer transitions 0/597 dead transitions. [2024-06-21 22:05:23,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 597 transitions, 12556 flow [2024-06-21 22:05:23,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:05:23,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:05:23,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 22:05:23,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-21 22:05:23,424 INFO L175 Difference]: Start difference. First operand has 378 places, 556 transitions, 10820 flow. Second operand 9 states and 159 transitions. [2024-06-21 22:05:23,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 597 transitions, 12556 flow [2024-06-21 22:05:25,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 597 transitions, 12277 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-21 22:05:25,071 INFO L231 Difference]: Finished difference. Result has 381 places, 557 transitions, 10976 flow [2024-06-21 22:05:25,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10545, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10976, PETRI_PLACES=381, PETRI_TRANSITIONS=557} [2024-06-21 22:05:25,072 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 340 predicate places. [2024-06-21 22:05:25,072 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 557 transitions, 10976 flow [2024-06-21 22:05:25,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:25,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:25,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:25,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 22:05:25,073 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:05:25,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:25,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1805995412, now seen corresponding path program 9 times [2024-06-21 22:05:25,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:25,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650653978] [2024-06-21 22:05:25,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:25,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:25,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:25,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:25,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:25,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650653978] [2024-06-21 22:05:25,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650653978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:25,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:25,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:05:25,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904275234] [2024-06-21 22:05:25,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:25,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:05:25,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:25,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:05:25,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:05:25,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:05:25,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 557 transitions, 10976 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:25,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:25,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:05:25,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:27,769 INFO L124 PetriNetUnfolderBase]: 4756/7386 cut-off events. [2024-06-21 22:05:27,769 INFO L125 PetriNetUnfolderBase]: For 633276/633286 co-relation queries the response was YES. [2024-06-21 22:05:27,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69335 conditions, 7386 events. 4756/7386 cut-off events. For 633276/633286 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 44489 event pairs, 916 based on Foata normal form. 42/7424 useless extension candidates. Maximal degree in co-relation 69156. Up to 6012 conditions per place. [2024-06-21 22:05:27,887 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 410 selfloop transitions, 183 changer transitions 0/596 dead transitions. [2024-06-21 22:05:27,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 596 transitions, 12368 flow [2024-06-21 22:05:27,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:05:27,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:05:27,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-21 22:05:27,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4225 [2024-06-21 22:05:27,889 INFO L175 Difference]: Start difference. First operand has 381 places, 557 transitions, 10976 flow. Second operand 10 states and 169 transitions. [2024-06-21 22:05:27,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 596 transitions, 12368 flow [2024-06-21 22:05:29,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 596 transitions, 11835 flow, removed 45 selfloop flow, removed 8 redundant places. [2024-06-21 22:05:29,616 INFO L231 Difference]: Finished difference. Result has 383 places, 557 transitions, 10821 flow [2024-06-21 22:05:29,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10443, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10821, PETRI_PLACES=383, PETRI_TRANSITIONS=557} [2024-06-21 22:05:29,617 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 342 predicate places. [2024-06-21 22:05:29,617 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 557 transitions, 10821 flow [2024-06-21 22:05:29,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:29,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:29,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:29,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 22:05:29,618 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:05:29,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:29,618 INFO L85 PathProgramCache]: Analyzing trace with hash 2088805609, now seen corresponding path program 3 times [2024-06-21 22:05:29,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:29,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914296075] [2024-06-21 22:05:29,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:29,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:29,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:30,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:30,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:30,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914296075] [2024-06-21 22:05:30,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914296075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:30,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:30,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:05:30,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375659420] [2024-06-21 22:05:30,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:30,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:05:30,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:30,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:05:30,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:05:30,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:05:30,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 557 transitions, 10821 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:30,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:30,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:05:30,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:31,896 INFO L124 PetriNetUnfolderBase]: 4766/7401 cut-off events. [2024-06-21 22:05:31,897 INFO L125 PetriNetUnfolderBase]: For 571439/571443 co-relation queries the response was YES. [2024-06-21 22:05:31,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68721 conditions, 7401 events. 4766/7401 cut-off events. For 571439/571443 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 44792 event pairs, 1396 based on Foata normal form. 6/7406 useless extension candidates. Maximal degree in co-relation 68542. Up to 7309 conditions per place. [2024-06-21 22:05:32,018 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 536 selfloop transitions, 34 changer transitions 0/573 dead transitions. [2024-06-21 22:05:32,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 573 transitions, 12064 flow [2024-06-21 22:05:32,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 22:05:32,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 22:05:32,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-21 22:05:32,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445 [2024-06-21 22:05:32,019 INFO L175 Difference]: Start difference. First operand has 383 places, 557 transitions, 10821 flow. Second operand 5 states and 89 transitions. [2024-06-21 22:05:32,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 573 transitions, 12064 flow [2024-06-21 22:05:33,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 573 transitions, 11672 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-21 22:05:33,748 INFO L231 Difference]: Finished difference. Result has 378 places, 560 transitions, 10583 flow [2024-06-21 22:05:33,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10429, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=10583, PETRI_PLACES=378, PETRI_TRANSITIONS=560} [2024-06-21 22:05:33,748 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 337 predicate places. [2024-06-21 22:05:33,749 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 560 transitions, 10583 flow [2024-06-21 22:05:33,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:33,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:33,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:33,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 22:05:33,749 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:05:33,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:33,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1133096087, now seen corresponding path program 4 times [2024-06-21 22:05:33,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:33,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229732626] [2024-06-21 22:05:33,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:33,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:33,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:34,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:34,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:34,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229732626] [2024-06-21 22:05:34,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229732626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:34,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:34,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:05:34,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168300975] [2024-06-21 22:05:34,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:34,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:05:34,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:34,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:05:34,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:05:34,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:05:34,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 560 transitions, 10583 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:34,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:34,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:05:34,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:36,136 INFO L124 PetriNetUnfolderBase]: 4760/7393 cut-off events. [2024-06-21 22:05:36,136 INFO L125 PetriNetUnfolderBase]: For 574571/574575 co-relation queries the response was YES. [2024-06-21 22:05:36,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67939 conditions, 7393 events. 4760/7393 cut-off events. For 574571/574575 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 44756 event pairs, 1395 based on Foata normal form. 6/7398 useless extension candidates. Maximal degree in co-relation 67760. Up to 7281 conditions per place. [2024-06-21 22:05:36,257 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 529 selfloop transitions, 43 changer transitions 0/575 dead transitions. [2024-06-21 22:05:36,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 575 transitions, 11785 flow [2024-06-21 22:05:36,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:05:36,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:05:36,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-21 22:05:36,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42083333333333334 [2024-06-21 22:05:36,258 INFO L175 Difference]: Start difference. First operand has 378 places, 560 transitions, 10583 flow. Second operand 6 states and 101 transitions. [2024-06-21 22:05:36,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 575 transitions, 11785 flow [2024-06-21 22:05:37,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 575 transitions, 11692 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-21 22:05:37,768 INFO L231 Difference]: Finished difference. Result has 381 places, 560 transitions, 10591 flow [2024-06-21 22:05:37,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10490, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10591, PETRI_PLACES=381, PETRI_TRANSITIONS=560} [2024-06-21 22:05:37,768 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 340 predicate places. [2024-06-21 22:05:37,768 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 560 transitions, 10591 flow [2024-06-21 22:05:37,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:37,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:37,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:37,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 22:05:37,769 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:05:37,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:37,769 INFO L85 PathProgramCache]: Analyzing trace with hash -2039039571, now seen corresponding path program 1 times [2024-06-21 22:05:37,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:37,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422440533] [2024-06-21 22:05:37,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:37,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:37,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:38,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:38,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:38,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422440533] [2024-06-21 22:05:38,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422440533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:38,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:38,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:05:38,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244542026] [2024-06-21 22:05:38,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:38,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:05:38,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:38,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:05:38,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:05:38,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 22:05:38,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 560 transitions, 10591 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:38,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:38,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 22:05:38,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:40,201 INFO L124 PetriNetUnfolderBase]: 4676/7327 cut-off events. [2024-06-21 22:05:40,201 INFO L125 PetriNetUnfolderBase]: For 626908/626938 co-relation queries the response was YES. [2024-06-21 22:05:40,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68480 conditions, 7327 events. 4676/7327 cut-off events. For 626908/626938 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 45032 event pairs, 1641 based on Foata normal form. 9/7303 useless extension candidates. Maximal degree in co-relation 68300. Up to 7005 conditions per place. [2024-06-21 22:05:40,311 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 496 selfloop transitions, 26 changer transitions 0/585 dead transitions. [2024-06-21 22:05:40,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 585 transitions, 11981 flow [2024-06-21 22:05:40,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:05:40,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:05:40,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-21 22:05:40,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-21 22:05:40,313 INFO L175 Difference]: Start difference. First operand has 381 places, 560 transitions, 10591 flow. Second operand 7 states and 118 transitions. [2024-06-21 22:05:40,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 585 transitions, 11981 flow [2024-06-21 22:05:42,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 585 transitions, 11879 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 22:05:42,020 INFO L231 Difference]: Finished difference. Result has 383 places, 566 transitions, 10683 flow [2024-06-21 22:05:42,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10491, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10683, PETRI_PLACES=383, PETRI_TRANSITIONS=566} [2024-06-21 22:05:42,020 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 342 predicate places. [2024-06-21 22:05:42,021 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 566 transitions, 10683 flow [2024-06-21 22:05:42,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:42,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:42,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:42,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 22:05:42,021 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:05:42,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:42,022 INFO L85 PathProgramCache]: Analyzing trace with hash -361835283, now seen corresponding path program 1 times [2024-06-21 22:05:42,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:42,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137848105] [2024-06-21 22:05:42,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:42,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:42,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:42,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:42,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:42,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137848105] [2024-06-21 22:05:42,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137848105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:42,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:42,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:05:42,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480013682] [2024-06-21 22:05:42,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:42,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:05:42,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:42,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:05:42,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:05:42,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:05:42,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 566 transitions, 10683 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:42,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:42,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:05:42,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:44,554 INFO L124 PetriNetUnfolderBase]: 4835/7494 cut-off events. [2024-06-21 22:05:44,555 INFO L125 PetriNetUnfolderBase]: For 606063/606071 co-relation queries the response was YES. [2024-06-21 22:05:44,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69432 conditions, 7494 events. 4835/7494 cut-off events. For 606063/606071 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 45202 event pairs, 1037 based on Foata normal form. 12/7505 useless extension candidates. Maximal degree in co-relation 69252. Up to 7145 conditions per place. [2024-06-21 22:05:44,677 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 495 selfloop transitions, 104 changer transitions 0/602 dead transitions. [2024-06-21 22:05:44,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 602 transitions, 12409 flow [2024-06-21 22:05:44,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:05:44,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:05:44,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-21 22:05:44,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 22:05:44,678 INFO L175 Difference]: Start difference. First operand has 383 places, 566 transitions, 10683 flow. Second operand 9 states and 150 transitions. [2024-06-21 22:05:44,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 602 transitions, 12409 flow [2024-06-21 22:05:46,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 602 transitions, 12324 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-21 22:05:46,419 INFO L231 Difference]: Finished difference. Result has 389 places, 575 transitions, 10962 flow [2024-06-21 22:05:46,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10598, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10962, PETRI_PLACES=389, PETRI_TRANSITIONS=575} [2024-06-21 22:05:46,419 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 348 predicate places. [2024-06-21 22:05:46,420 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 575 transitions, 10962 flow [2024-06-21 22:05:46,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:46,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:46,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:46,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 22:05:46,420 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:05:46,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:46,421 INFO L85 PathProgramCache]: Analyzing trace with hash -2039034921, now seen corresponding path program 2 times [2024-06-21 22:05:46,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:46,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050111415] [2024-06-21 22:05:46,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:46,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:46,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:47,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:47,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:47,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050111415] [2024-06-21 22:05:47,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050111415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:47,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:47,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:05:47,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974282332] [2024-06-21 22:05:47,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:47,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:05:47,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:47,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:05:47,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:05:47,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 22:05:47,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 575 transitions, 10962 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:47,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:47,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 22:05:47,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:48,861 INFO L124 PetriNetUnfolderBase]: 4755/7439 cut-off events. [2024-06-21 22:05:48,861 INFO L125 PetriNetUnfolderBase]: For 659899/659929 co-relation queries the response was YES. [2024-06-21 22:05:48,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70443 conditions, 7439 events. 4755/7439 cut-off events. For 659899/659929 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 45705 event pairs, 1652 based on Foata normal form. 9/7415 useless extension candidates. Maximal degree in co-relation 70261. Up to 7127 conditions per place. [2024-06-21 22:05:48,984 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 509 selfloop transitions, 26 changer transitions 0/598 dead transitions. [2024-06-21 22:05:48,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 598 transitions, 12194 flow [2024-06-21 22:05:48,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:05:48,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:05:48,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-21 22:05:48,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035714285714286 [2024-06-21 22:05:48,985 INFO L175 Difference]: Start difference. First operand has 389 places, 575 transitions, 10962 flow. Second operand 7 states and 113 transitions. [2024-06-21 22:05:48,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 598 transitions, 12194 flow [2024-06-21 22:05:50,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 598 transitions, 12074 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-21 22:05:50,632 INFO L231 Difference]: Finished difference. Result has 393 places, 583 transitions, 11011 flow [2024-06-21 22:05:50,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10842, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11011, PETRI_PLACES=393, PETRI_TRANSITIONS=583} [2024-06-21 22:05:50,632 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 352 predicate places. [2024-06-21 22:05:50,632 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 583 transitions, 11011 flow [2024-06-21 22:05:50,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:50,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:50,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:50,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 22:05:50,633 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:05:50,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:50,633 INFO L85 PathProgramCache]: Analyzing trace with hash 162511861, now seen corresponding path program 2 times [2024-06-21 22:05:50,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:50,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712267373] [2024-06-21 22:05:50,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:50,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:50,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:51,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:51,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:51,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712267373] [2024-06-21 22:05:51,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712267373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:51,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:51,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:05:51,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907786648] [2024-06-21 22:05:51,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:51,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:05:51,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:51,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:05:51,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:05:51,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:05:51,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 583 transitions, 11011 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:51,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:51,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:05:51,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:53,313 INFO L124 PetriNetUnfolderBase]: 4935/7645 cut-off events. [2024-06-21 22:05:53,313 INFO L125 PetriNetUnfolderBase]: For 651265/651269 co-relation queries the response was YES. [2024-06-21 22:05:53,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71278 conditions, 7645 events. 4935/7645 cut-off events. For 651265/651269 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 46296 event pairs, 1361 based on Foata normal form. 12/7656 useless extension candidates. Maximal degree in co-relation 71094. Up to 7237 conditions per place. [2024-06-21 22:05:53,437 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 505 selfloop transitions, 124 changer transitions 0/632 dead transitions. [2024-06-21 22:05:53,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 632 transitions, 12882 flow [2024-06-21 22:05:53,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:05:53,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:05:53,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 22:05:53,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 22:05:53,439 INFO L175 Difference]: Start difference. First operand has 393 places, 583 transitions, 11011 flow. Second operand 8 states and 136 transitions. [2024-06-21 22:05:53,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 632 transitions, 12882 flow [2024-06-21 22:05:55,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 632 transitions, 12781 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-21 22:05:55,170 INFO L231 Difference]: Finished difference. Result has 398 places, 604 transitions, 11578 flow [2024-06-21 22:05:55,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10910, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11578, PETRI_PLACES=398, PETRI_TRANSITIONS=604} [2024-06-21 22:05:55,171 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 357 predicate places. [2024-06-21 22:05:55,171 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 604 transitions, 11578 flow [2024-06-21 22:05:55,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:55,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:55,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:55,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 22:05:55,171 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:05:55,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:55,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1144530251, now seen corresponding path program 3 times [2024-06-21 22:05:55,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:55,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677947063] [2024-06-21 22:05:55,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:55,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:55,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:55,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:55,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:55,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677947063] [2024-06-21 22:05:55,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677947063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:55,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:55,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:05:55,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905654174] [2024-06-21 22:05:55,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:55,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:05:55,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:55,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:05:55,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:05:55,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 22:05:55,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 604 transitions, 11578 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:55,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:55,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 22:05:55,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:57,688 INFO L124 PetriNetUnfolderBase]: 4808/7516 cut-off events. [2024-06-21 22:05:57,688 INFO L125 PetriNetUnfolderBase]: For 669376/669404 co-relation queries the response was YES. [2024-06-21 22:05:57,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71194 conditions, 7516 events. 4808/7516 cut-off events. For 669376/669404 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 46173 event pairs, 1664 based on Foata normal form. 9/7492 useless extension candidates. Maximal degree in co-relation 71008. Up to 7190 conditions per place. [2024-06-21 22:05:57,814 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 527 selfloop transitions, 24 changer transitions 0/620 dead transitions. [2024-06-21 22:05:57,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 620 transitions, 12748 flow [2024-06-21 22:05:57,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:05:57,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:05:57,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-21 22:05:57,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-21 22:05:57,815 INFO L175 Difference]: Start difference. First operand has 398 places, 604 transitions, 11578 flow. Second operand 6 states and 104 transitions. [2024-06-21 22:05:57,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 620 transitions, 12748 flow [2024-06-21 22:05:59,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 620 transitions, 12491 flow, removed 65 selfloop flow, removed 4 redundant places. [2024-06-21 22:05:59,804 INFO L231 Difference]: Finished difference. Result has 400 places, 604 transitions, 11380 flow [2024-06-21 22:05:59,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11321, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=11380, PETRI_PLACES=400, PETRI_TRANSITIONS=604} [2024-06-21 22:05:59,804 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 359 predicate places. [2024-06-21 22:05:59,805 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 604 transitions, 11380 flow [2024-06-21 22:05:59,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:59,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:59,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:59,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 22:05:59,805 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:05:59,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:59,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1120153277, now seen corresponding path program 1 times [2024-06-21 22:05:59,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:59,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513712575] [2024-06-21 22:05:59,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:59,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:59,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:00,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:06:00,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:00,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513712575] [2024-06-21 22:06:00,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513712575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:00,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:00,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:06:00,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466988821] [2024-06-21 22:06:00,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:00,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:06:00,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:00,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:06:00,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:06:00,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:06:00,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 604 transitions, 11380 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:00,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:00,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:06:00,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:02,671 INFO L124 PetriNetUnfolderBase]: 4921/7630 cut-off events. [2024-06-21 22:06:02,671 INFO L125 PetriNetUnfolderBase]: For 647758/647758 co-relation queries the response was YES. [2024-06-21 22:06:02,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70836 conditions, 7630 events. 4921/7630 cut-off events. For 647758/647758 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 46230 event pairs, 1732 based on Foata normal form. 2/7631 useless extension candidates. Maximal degree in co-relation 70649. Up to 7562 conditions per place. [2024-06-21 22:06:02,789 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 597 selfloop transitions, 14 changer transitions 0/614 dead transitions. [2024-06-21 22:06:02,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 614 transitions, 12658 flow [2024-06-21 22:06:02,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 22:06:02,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 22:06:02,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 80 transitions. [2024-06-21 22:06:02,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 22:06:02,791 INFO L175 Difference]: Start difference. First operand has 400 places, 604 transitions, 11380 flow. Second operand 5 states and 80 transitions. [2024-06-21 22:06:02,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 614 transitions, 12658 flow [2024-06-21 22:06:04,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 614 transitions, 12599 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 22:06:04,594 INFO L231 Difference]: Finished difference. Result has 400 places, 606 transitions, 11386 flow [2024-06-21 22:06:04,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11321, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=590, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=11386, PETRI_PLACES=400, PETRI_TRANSITIONS=606} [2024-06-21 22:06:04,594 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 359 predicate places. [2024-06-21 22:06:04,595 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 606 transitions, 11386 flow [2024-06-21 22:06:04,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:04,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:04,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:06:04,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 22:06:04,595 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:06:04,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:04,596 INFO L85 PathProgramCache]: Analyzing trace with hash 195274251, now seen corresponding path program 1 times [2024-06-21 22:06:04,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:04,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043689933] [2024-06-21 22:06:04,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:04,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:04,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:05,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:06:05,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:05,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043689933] [2024-06-21 22:06:05,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043689933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:05,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:05,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 22:06:05,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834943886] [2024-06-21 22:06:05,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:05,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 22:06:05,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:05,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 22:06:05,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 22:06:05,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:06:05,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 606 transitions, 11386 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:05,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:05,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:06:05,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:07,769 INFO L124 PetriNetUnfolderBase]: 4962/7693 cut-off events. [2024-06-21 22:06:07,769 INFO L125 PetriNetUnfolderBase]: For 689542/689550 co-relation queries the response was YES. [2024-06-21 22:06:07,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71649 conditions, 7693 events. 4962/7693 cut-off events. For 689542/689550 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 46419 event pairs, 1016 based on Foata normal form. 20/7712 useless extension candidates. Maximal degree in co-relation 71461. Up to 7195 conditions per place. [2024-06-21 22:06:07,883 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 569 selfloop transitions, 80 changer transitions 0/652 dead transitions. [2024-06-21 22:06:07,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 652 transitions, 12926 flow [2024-06-21 22:06:07,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 22:06:07,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 22:06:07,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 174 transitions. [2024-06-21 22:06:07,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39545454545454545 [2024-06-21 22:06:07,885 INFO L175 Difference]: Start difference. First operand has 400 places, 606 transitions, 11386 flow. Second operand 11 states and 174 transitions. [2024-06-21 22:06:07,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 652 transitions, 12926 flow [2024-06-21 22:06:09,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 652 transitions, 12877 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-21 22:06:09,775 INFO L231 Difference]: Finished difference. Result has 408 places, 607 transitions, 11567 flow [2024-06-21 22:06:09,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11337, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11567, PETRI_PLACES=408, PETRI_TRANSITIONS=607} [2024-06-21 22:06:09,776 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 367 predicate places. [2024-06-21 22:06:09,776 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 607 transitions, 11567 flow [2024-06-21 22:06:09,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:09,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:09,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:06:09,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 22:06:09,777 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:06:09,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:09,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1644216477, now seen corresponding path program 2 times [2024-06-21 22:06:09,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:09,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793505026] [2024-06-21 22:06:09,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:09,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:09,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:10,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:06:10,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:10,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793505026] [2024-06-21 22:06:10,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793505026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:10,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:10,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 22:06:10,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275292972] [2024-06-21 22:06:10,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:10,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 22:06:10,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:10,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 22:06:10,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 22:06:11,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:06:11,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 607 transitions, 11567 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:11,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:11,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:06:11,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:13,146 INFO L124 PetriNetUnfolderBase]: 5030/7805 cut-off events. [2024-06-21 22:06:13,146 INFO L125 PetriNetUnfolderBase]: For 710831/710839 co-relation queries the response was YES. [2024-06-21 22:06:13,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73268 conditions, 7805 events. 5030/7805 cut-off events. For 710831/710839 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 47570 event pairs, 1311 based on Foata normal form. 20/7824 useless extension candidates. Maximal degree in co-relation 73079. Up to 7370 conditions per place. [2024-06-21 22:06:13,262 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 576 selfloop transitions, 75 changer transitions 0/654 dead transitions. [2024-06-21 22:06:13,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 654 transitions, 13179 flow [2024-06-21 22:06:13,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 22:06:13,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 22:06:13,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 176 transitions. [2024-06-21 22:06:13,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 22:06:13,264 INFO L175 Difference]: Start difference. First operand has 408 places, 607 transitions, 11567 flow. Second operand 11 states and 176 transitions. [2024-06-21 22:06:13,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 654 transitions, 13179 flow [2024-06-21 22:06:15,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 654 transitions, 12924 flow, removed 48 selfloop flow, removed 9 redundant places. [2024-06-21 22:06:15,446 INFO L231 Difference]: Finished difference. Result has 410 places, 609 transitions, 11602 flow [2024-06-21 22:06:15,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11363, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11602, PETRI_PLACES=410, PETRI_TRANSITIONS=609} [2024-06-21 22:06:15,447 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 369 predicate places. [2024-06-21 22:06:15,447 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 609 transitions, 11602 flow [2024-06-21 22:06:15,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:15,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:15,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:06:15,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 22:06:15,448 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:06:15,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:15,448 INFO L85 PathProgramCache]: Analyzing trace with hash 125484243, now seen corresponding path program 3 times [2024-06-21 22:06:15,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:15,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882190041] [2024-06-21 22:06:15,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:15,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:15,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:16,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:06:16,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:16,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882190041] [2024-06-21 22:06:16,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882190041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:16,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:16,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 22:06:16,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824813715] [2024-06-21 22:06:16,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:16,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 22:06:16,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:16,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 22:06:16,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 22:06:16,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:06:16,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 609 transitions, 11602 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:16,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:16,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:06:16,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:18,814 INFO L124 PetriNetUnfolderBase]: 5010/7781 cut-off events. [2024-06-21 22:06:18,814 INFO L125 PetriNetUnfolderBase]: For 686935/686939 co-relation queries the response was YES. [2024-06-21 22:06:18,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71812 conditions, 7781 events. 5010/7781 cut-off events. For 686935/686939 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 47360 event pairs, 1302 based on Foata normal form. 16/7796 useless extension candidates. Maximal degree in co-relation 71622. Up to 7083 conditions per place. [2024-06-21 22:06:18,934 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 514 selfloop transitions, 141 changer transitions 0/658 dead transitions. [2024-06-21 22:06:18,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 658 transitions, 13140 flow [2024-06-21 22:06:18,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 22:06:18,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 22:06:18,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 194 transitions. [2024-06-21 22:06:18,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4041666666666667 [2024-06-21 22:06:18,936 INFO L175 Difference]: Start difference. First operand has 410 places, 609 transitions, 11602 flow. Second operand 12 states and 194 transitions. [2024-06-21 22:06:18,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 658 transitions, 13140 flow [2024-06-21 22:06:21,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 658 transitions, 12941 flow, removed 27 selfloop flow, removed 9 redundant places. [2024-06-21 22:06:21,031 INFO L231 Difference]: Finished difference. Result has 414 places, 610 transitions, 11753 flow [2024-06-21 22:06:21,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11403, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11753, PETRI_PLACES=414, PETRI_TRANSITIONS=610} [2024-06-21 22:06:21,031 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 373 predicate places. [2024-06-21 22:06:21,031 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 610 transitions, 11753 flow [2024-06-21 22:06:21,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:21,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:21,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:06:21,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 22:06:21,032 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:06:21,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:21,032 INFO L85 PathProgramCache]: Analyzing trace with hash -583527253, now seen corresponding path program 4 times [2024-06-21 22:06:21,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:21,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103628822] [2024-06-21 22:06:21,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:21,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:21,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:22,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:06:22,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:22,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103628822] [2024-06-21 22:06:22,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103628822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:22,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:22,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 22:06:22,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968903554] [2024-06-21 22:06:22,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:22,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 22:06:22,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:22,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 22:06:22,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 22:06:22,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:06:22,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 610 transitions, 11753 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:22,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:22,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:06:22,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:24,472 INFO L124 PetriNetUnfolderBase]: 5051/7850 cut-off events. [2024-06-21 22:06:24,473 INFO L125 PetriNetUnfolderBase]: For 704736/704740 co-relation queries the response was YES. [2024-06-21 22:06:24,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72698 conditions, 7850 events. 5051/7850 cut-off events. For 704736/704740 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 47935 event pairs, 1286 based on Foata normal form. 16/7865 useless extension candidates. Maximal degree in co-relation 72506. Up to 7005 conditions per place. [2024-06-21 22:06:24,595 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 511 selfloop transitions, 145 changer transitions 0/659 dead transitions. [2024-06-21 22:06:24,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 659 transitions, 13325 flow [2024-06-21 22:06:24,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 22:06:24,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 22:06:24,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 194 transitions. [2024-06-21 22:06:24,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4041666666666667 [2024-06-21 22:06:24,597 INFO L175 Difference]: Start difference. First operand has 414 places, 610 transitions, 11753 flow. Second operand 12 states and 194 transitions. [2024-06-21 22:06:24,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 659 transitions, 13325 flow [2024-06-21 22:06:26,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 659 transitions, 13093 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-21 22:06:26,673 INFO L231 Difference]: Finished difference. Result has 418 places, 611 transitions, 11886 flow [2024-06-21 22:06:26,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11521, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11886, PETRI_PLACES=418, PETRI_TRANSITIONS=611} [2024-06-21 22:06:26,674 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 377 predicate places. [2024-06-21 22:06:26,674 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 611 transitions, 11886 flow [2024-06-21 22:06:26,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:26,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:26,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:06:26,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 22:06:26,675 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:06:26,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:26,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1852176835, now seen corresponding path program 5 times [2024-06-21 22:06:26,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:26,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46170559] [2024-06-21 22:06:26,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:26,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:26,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:27,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:06:27,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:27,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46170559] [2024-06-21 22:06:27,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46170559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:27,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:27,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 22:06:27,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486413418] [2024-06-21 22:06:27,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:27,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 22:06:27,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:27,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 22:06:27,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 22:06:28,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:06:28,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 611 transitions, 11886 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:28,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:28,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:06:28,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:30,191 INFO L124 PetriNetUnfolderBase]: 5146/8001 cut-off events. [2024-06-21 22:06:30,192 INFO L125 PetriNetUnfolderBase]: For 726332/726340 co-relation queries the response was YES. [2024-06-21 22:06:30,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74048 conditions, 8001 events. 5146/8001 cut-off events. For 726332/726340 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 49025 event pairs, 1079 based on Foata normal form. 20/8020 useless extension candidates. Maximal degree in co-relation 73855. Up to 7537 conditions per place. [2024-06-21 22:06:30,314 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 580 selfloop transitions, 74 changer transitions 0/657 dead transitions. [2024-06-21 22:06:30,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 657 transitions, 13463 flow [2024-06-21 22:06:30,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 22:06:30,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 22:06:30,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 177 transitions. [2024-06-21 22:06:30,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4022727272727273 [2024-06-21 22:06:30,316 INFO L175 Difference]: Start difference. First operand has 418 places, 611 transitions, 11886 flow. Second operand 11 states and 177 transitions. [2024-06-21 22:06:30,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 657 transitions, 13463 flow [2024-06-21 22:06:32,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 657 transitions, 13155 flow, removed 34 selfloop flow, removed 9 redundant places. [2024-06-21 22:06:32,642 INFO L231 Difference]: Finished difference. Result has 420 places, 614 transitions, 11840 flow [2024-06-21 22:06:32,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11580, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11840, PETRI_PLACES=420, PETRI_TRANSITIONS=614} [2024-06-21 22:06:32,643 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 379 predicate places. [2024-06-21 22:06:32,643 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 614 transitions, 11840 flow [2024-06-21 22:06:32,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:32,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:32,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:06:32,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 22:06:32,643 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:06:32,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:32,644 INFO L85 PathProgramCache]: Analyzing trace with hash -385083423, now seen corresponding path program 3 times [2024-06-21 22:06:32,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:32,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633439561] [2024-06-21 22:06:32,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:32,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:32,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:33,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:06:33,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:33,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633439561] [2024-06-21 22:06:33,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633439561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:33,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:33,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:06:33,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164561981] [2024-06-21 22:06:33,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:33,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:06:33,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:33,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:06:33,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:06:33,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:06:33,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 614 transitions, 11840 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:33,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:33,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:06:33,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:35,657 INFO L124 PetriNetUnfolderBase]: 5134/7985 cut-off events. [2024-06-21 22:06:35,658 INFO L125 PetriNetUnfolderBase]: For 699629/699637 co-relation queries the response was YES. [2024-06-21 22:06:35,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73352 conditions, 7985 events. 5134/7985 cut-off events. For 699629/699637 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 48814 event pairs, 1151 based on Foata normal form. 12/7996 useless extension candidates. Maximal degree in co-relation 73158. Up to 7597 conditions per place. [2024-06-21 22:06:35,776 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 527 selfloop transitions, 113 changer transitions 0/643 dead transitions. [2024-06-21 22:06:35,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 643 transitions, 13400 flow [2024-06-21 22:06:35,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:06:35,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:06:35,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 22:06:35,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41944444444444445 [2024-06-21 22:06:35,778 INFO L175 Difference]: Start difference. First operand has 420 places, 614 transitions, 11840 flow. Second operand 9 states and 151 transitions. [2024-06-21 22:06:35,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 643 transitions, 13400 flow [2024-06-21 22:06:37,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 643 transitions, 13180 flow, removed 39 selfloop flow, removed 9 redundant places. [2024-06-21 22:06:37,897 INFO L231 Difference]: Finished difference. Result has 420 places, 614 transitions, 11855 flow [2024-06-21 22:06:37,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11620, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11855, PETRI_PLACES=420, PETRI_TRANSITIONS=614} [2024-06-21 22:06:37,898 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 379 predicate places. [2024-06-21 22:06:37,898 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 614 transitions, 11855 flow [2024-06-21 22:06:37,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:37,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:37,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:06:37,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 22:06:37,899 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:06:37,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:37,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1666439451, now seen corresponding path program 6 times [2024-06-21 22:06:37,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:37,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719945203] [2024-06-21 22:06:37,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:37,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:37,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:38,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:06:38,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:38,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719945203] [2024-06-21 22:06:38,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719945203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:38,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:38,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 22:06:38,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637224423] [2024-06-21 22:06:38,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:38,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 22:06:38,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:38,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 22:06:38,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 22:06:39,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:06:39,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 614 transitions, 11855 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:39,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:39,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:06:39,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:41,328 INFO L124 PetriNetUnfolderBase]: 5175/8058 cut-off events. [2024-06-21 22:06:41,328 INFO L125 PetriNetUnfolderBase]: For 741645/741653 co-relation queries the response was YES. [2024-06-21 22:06:41,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73851 conditions, 8058 events. 5175/8058 cut-off events. For 741645/741653 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 49330 event pairs, 1031 based on Foata normal form. 20/8077 useless extension candidates. Maximal degree in co-relation 73656. Up to 7052 conditions per place. [2024-06-21 22:06:41,452 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 550 selfloop transitions, 102 changer transitions 0/655 dead transitions. [2024-06-21 22:06:41,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 655 transitions, 13393 flow [2024-06-21 22:06:41,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:06:41,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:06:41,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-06-21 22:06:41,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3975 [2024-06-21 22:06:41,454 INFO L175 Difference]: Start difference. First operand has 420 places, 614 transitions, 11855 flow. Second operand 10 states and 159 transitions. [2024-06-21 22:06:41,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 655 transitions, 13393 flow [2024-06-21 22:06:43,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 655 transitions, 13219 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 22:06:43,905 INFO L231 Difference]: Finished difference. Result has 425 places, 615 transitions, 11971 flow [2024-06-21 22:06:43,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11681, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11971, PETRI_PLACES=425, PETRI_TRANSITIONS=615} [2024-06-21 22:06:43,906 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 384 predicate places. [2024-06-21 22:06:43,906 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 615 transitions, 11971 flow [2024-06-21 22:06:43,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:43,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:43,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:06:43,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 22:06:43,907 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:06:43,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:43,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1608347001, now seen corresponding path program 7 times [2024-06-21 22:06:43,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:43,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509149995] [2024-06-21 22:06:43,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:43,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:43,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:45,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:06:45,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:45,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509149995] [2024-06-21 22:06:45,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509149995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:45,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:45,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 22:06:45,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562723596] [2024-06-21 22:06:45,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:45,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 22:06:45,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:45,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 22:06:45,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 22:06:45,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:06:45,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 615 transitions, 11971 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:45,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:45,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:06:45,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:47,388 INFO L124 PetriNetUnfolderBase]: 5257/8208 cut-off events. [2024-06-21 22:06:47,388 INFO L125 PetriNetUnfolderBase]: For 759900/759904 co-relation queries the response was YES. [2024-06-21 22:06:47,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75338 conditions, 8208 events. 5257/8208 cut-off events. For 759900/759904 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 50898 event pairs, 1364 based on Foata normal form. 16/8223 useless extension candidates. Maximal degree in co-relation 75142. Up to 7333 conditions per place. [2024-06-21 22:06:47,514 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 517 selfloop transitions, 137 changer transitions 0/657 dead transitions. [2024-06-21 22:06:47,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 657 transitions, 13533 flow [2024-06-21 22:06:47,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:06:47,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:06:47,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-21 22:06:47,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.405 [2024-06-21 22:06:47,516 INFO L175 Difference]: Start difference. First operand has 425 places, 615 transitions, 11971 flow. Second operand 10 states and 162 transitions. [2024-06-21 22:06:47,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 657 transitions, 13533 flow [2024-06-21 22:06:50,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 657 transitions, 13271 flow, removed 36 selfloop flow, removed 8 redundant places. [2024-06-21 22:06:50,082 INFO L231 Difference]: Finished difference. Result has 427 places, 617 transitions, 12079 flow [2024-06-21 22:06:50,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11715, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12079, PETRI_PLACES=427, PETRI_TRANSITIONS=617} [2024-06-21 22:06:50,083 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 386 predicate places. [2024-06-21 22:06:50,083 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 617 transitions, 12079 flow [2024-06-21 22:06:50,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:50,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:50,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:06:50,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 22:06:50,083 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:06:50,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:50,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1608231681, now seen corresponding path program 8 times [2024-06-21 22:06:50,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:50,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596150861] [2024-06-21 22:06:50,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:50,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:50,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:51,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:06:51,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:51,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596150861] [2024-06-21 22:06:51,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596150861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:51,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:51,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:06:51,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446283863] [2024-06-21 22:06:51,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:51,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:06:51,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:51,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:06:51,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:06:51,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:06:51,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 617 transitions, 12079 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:51,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:51,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:06:51,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:53,423 INFO L124 PetriNetUnfolderBase]: 5237/8166 cut-off events. [2024-06-21 22:06:53,423 INFO L125 PetriNetUnfolderBase]: For 689015/689023 co-relation queries the response was YES. [2024-06-21 22:06:53,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73603 conditions, 8166 events. 5237/8166 cut-off events. For 689015/689023 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 50323 event pairs, 1111 based on Foata normal form. 20/8185 useless extension candidates. Maximal degree in co-relation 73406. Up to 7196 conditions per place. [2024-06-21 22:06:53,552 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 486 selfloop transitions, 163 changer transitions 0/652 dead transitions. [2024-06-21 22:06:53,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 652 transitions, 13553 flow [2024-06-21 22:06:53,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:06:53,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:06:53,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-21 22:06:53,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-06-21 22:06:53,553 INFO L175 Difference]: Start difference. First operand has 427 places, 617 transitions, 12079 flow. Second operand 9 states and 147 transitions. [2024-06-21 22:06:53,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 652 transitions, 13553 flow [2024-06-21 22:06:55,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 652 transitions, 13231 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-21 22:06:55,566 INFO L231 Difference]: Finished difference. Result has 429 places, 618 transitions, 12161 flow [2024-06-21 22:06:55,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11757, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12161, PETRI_PLACES=429, PETRI_TRANSITIONS=618} [2024-06-21 22:06:55,567 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 388 predicate places. [2024-06-21 22:06:55,567 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 618 transitions, 12161 flow [2024-06-21 22:06:55,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:55,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:55,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:06:55,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 22:06:55,568 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:06:55,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:55,568 INFO L85 PathProgramCache]: Analyzing trace with hash 204763783, now seen corresponding path program 9 times [2024-06-21 22:06:55,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:55,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980865064] [2024-06-21 22:06:55,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:55,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:55,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:56,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:06:56,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:56,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980865064] [2024-06-21 22:06:56,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980865064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:56,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:56,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:06:56,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074276287] [2024-06-21 22:06:56,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:56,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:06:56,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:56,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:06:56,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:06:56,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:06:56,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 618 transitions, 12161 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:56,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:56,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:06:56,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:59,073 INFO L124 PetriNetUnfolderBase]: 5278/8238 cut-off events. [2024-06-21 22:06:59,074 INFO L125 PetriNetUnfolderBase]: For 706042/706050 co-relation queries the response was YES. [2024-06-21 22:06:59,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74420 conditions, 8238 events. 5278/8238 cut-off events. For 706042/706050 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 50901 event pairs, 1080 based on Foata normal form. 20/8257 useless extension candidates. Maximal degree in co-relation 74221. Up to 6923 conditions per place. [2024-06-21 22:06:59,220 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 477 selfloop transitions, 173 changer transitions 0/653 dead transitions. [2024-06-21 22:06:59,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 653 transitions, 13673 flow [2024-06-21 22:06:59,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:06:59,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:06:59,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-21 22:06:59,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-06-21 22:06:59,221 INFO L175 Difference]: Start difference. First operand has 429 places, 618 transitions, 12161 flow. Second operand 9 states and 147 transitions. [2024-06-21 22:06:59,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 653 transitions, 13673 flow [2024-06-21 22:07:01,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 653 transitions, 13303 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-21 22:07:01,268 INFO L231 Difference]: Finished difference. Result has 430 places, 619 transitions, 12217 flow [2024-06-21 22:07:01,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11791, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=618, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12217, PETRI_PLACES=430, PETRI_TRANSITIONS=619} [2024-06-21 22:07:01,269 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 389 predicate places. [2024-06-21 22:07:01,269 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 619 transitions, 12217 flow [2024-06-21 22:07:01,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:01,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:07:01,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:07:01,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 22:07:01,269 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:07:01,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:07:01,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1432301191, now seen corresponding path program 4 times [2024-06-21 22:07:01,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:07:01,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435385217] [2024-06-21 22:07:01,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:07:01,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:07:01,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:07:01,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:07:01,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:07:01,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435385217] [2024-06-21 22:07:01,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435385217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:07:01,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:07:01,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:07:01,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625304612] [2024-06-21 22:07:01,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:07:01,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:07:01,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:07:01,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:07:01,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:07:01,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:07:01,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 619 transitions, 12217 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:01,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:07:01,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:07:01,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:07:04,367 INFO L124 PetriNetUnfolderBase]: 5340/8324 cut-off events. [2024-06-21 22:07:04,367 INFO L125 PetriNetUnfolderBase]: For 698131/698139 co-relation queries the response was YES. [2024-06-21 22:07:04,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75278 conditions, 8324 events. 5340/8324 cut-off events. For 698131/698139 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 51453 event pairs, 1205 based on Foata normal form. 12/8335 useless extension candidates. Maximal degree in co-relation 75079. Up to 7895 conditions per place. [2024-06-21 22:07:04,496 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 532 selfloop transitions, 123 changer transitions 0/658 dead transitions. [2024-06-21 22:07:04,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 658 transitions, 14168 flow [2024-06-21 22:07:04,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:07:04,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:07:04,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 22:07:04,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421875 [2024-06-21 22:07:04,498 INFO L175 Difference]: Start difference. First operand has 430 places, 619 transitions, 12217 flow. Second operand 8 states and 135 transitions. [2024-06-21 22:07:04,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 658 transitions, 14168 flow [2024-06-21 22:07:06,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 658 transitions, 13816 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-21 22:07:06,600 INFO L231 Difference]: Finished difference. Result has 433 places, 630 transitions, 12350 flow [2024-06-21 22:07:06,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11873, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12350, PETRI_PLACES=433, PETRI_TRANSITIONS=630} [2024-06-21 22:07:06,600 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 392 predicate places. [2024-06-21 22:07:06,600 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 630 transitions, 12350 flow [2024-06-21 22:07:06,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:06,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:07:06,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:07:06,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 22:07:06,601 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:07:06,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:07:06,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1432312351, now seen corresponding path program 5 times [2024-06-21 22:07:06,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:07:06,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265032536] [2024-06-21 22:07:06,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:07:06,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:07:06,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:07:07,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:07:07,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:07:07,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265032536] [2024-06-21 22:07:07,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265032536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:07:07,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:07:07,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:07:07,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495316311] [2024-06-21 22:07:07,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:07:07,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:07:07,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:07:07,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:07:07,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:07:07,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:07:07,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 630 transitions, 12350 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:07,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:07:07,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:07:07,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:07:09,769 INFO L124 PetriNetUnfolderBase]: 5328/8308 cut-off events. [2024-06-21 22:07:09,770 INFO L125 PetriNetUnfolderBase]: For 663671/663679 co-relation queries the response was YES. [2024-06-21 22:07:09,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74183 conditions, 8308 events. 5328/8308 cut-off events. For 663671/663679 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 51387 event pairs, 1201 based on Foata normal form. 12/8319 useless extension candidates. Maximal degree in co-relation 73982. Up to 7887 conditions per place. [2024-06-21 22:07:09,897 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 515 selfloop transitions, 135 changer transitions 0/653 dead transitions. [2024-06-21 22:07:09,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 653 transitions, 13907 flow [2024-06-21 22:07:09,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:07:09,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:07:09,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 22:07:09,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-21 22:07:09,898 INFO L175 Difference]: Start difference. First operand has 433 places, 630 transitions, 12350 flow. Second operand 8 states and 132 transitions. [2024-06-21 22:07:09,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 653 transitions, 13907 flow [2024-06-21 22:07:12,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 653 transitions, 13667 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-21 22:07:12,027 INFO L231 Difference]: Finished difference. Result has 436 places, 630 transitions, 12392 flow [2024-06-21 22:07:12,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12112, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=630, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12392, PETRI_PLACES=436, PETRI_TRANSITIONS=630} [2024-06-21 22:07:12,027 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 395 predicate places. [2024-06-21 22:07:12,027 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 630 transitions, 12392 flow [2024-06-21 22:07:12,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:12,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:07:12,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:07:12,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 22:07:12,028 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:07:12,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:07:12,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1205298965, now seen corresponding path program 10 times [2024-06-21 22:07:12,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:07:12,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429492381] [2024-06-21 22:07:12,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:07:12,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:07:12,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:07:13,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:07:13,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:07:13,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429492381] [2024-06-21 22:07:13,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429492381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:07:13,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:07:13,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:07:13,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797058369] [2024-06-21 22:07:13,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:07:13,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:07:13,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:07:13,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:07:13,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:07:13,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:07:13,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 630 transitions, 12392 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:13,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:07:13,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:07:13,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:07:15,761 INFO L124 PetriNetUnfolderBase]: 5308/8278 cut-off events. [2024-06-21 22:07:15,761 INFO L125 PetriNetUnfolderBase]: For 651582/651592 co-relation queries the response was YES. [2024-06-21 22:07:15,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72917 conditions, 8278 events. 5308/8278 cut-off events. For 651582/651592 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 51132 event pairs, 1115 based on Foata normal form. 22/8296 useless extension candidates. Maximal degree in co-relation 72716. Up to 7405 conditions per place. [2024-06-21 22:07:15,888 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 506 selfloop transitions, 155 changer transitions 0/664 dead transitions. [2024-06-21 22:07:15,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 664 transitions, 13759 flow [2024-06-21 22:07:15,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:07:15,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:07:15,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-21 22:07:15,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4111111111111111 [2024-06-21 22:07:15,889 INFO L175 Difference]: Start difference. First operand has 436 places, 630 transitions, 12392 flow. Second operand 9 states and 148 transitions. [2024-06-21 22:07:15,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 664 transitions, 13759 flow [2024-06-21 22:07:18,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 664 transitions, 13551 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 22:07:18,706 INFO L231 Difference]: Finished difference. Result has 439 places, 631 transitions, 12411 flow [2024-06-21 22:07:18,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12040, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12411, PETRI_PLACES=439, PETRI_TRANSITIONS=631} [2024-06-21 22:07:18,706 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 398 predicate places. [2024-06-21 22:07:18,706 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 631 transitions, 12411 flow [2024-06-21 22:07:18,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:18,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:07:18,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:07:18,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 22:07:18,707 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:07:18,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:07:18,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1890143755, now seen corresponding path program 6 times [2024-06-21 22:07:18,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:07:18,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848605352] [2024-06-21 22:07:18,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:07:18,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:07:18,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:07:19,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:07:19,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:07:19,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848605352] [2024-06-21 22:07:19,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848605352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:07:19,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:07:19,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:07:19,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531552043] [2024-06-21 22:07:19,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:07:19,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:07:19,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:07:19,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:07:19,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:07:19,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:07:19,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 631 transitions, 12411 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:19,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:07:19,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:07:19,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:07:22,028 INFO L124 PetriNetUnfolderBase]: 5360/8348 cut-off events. [2024-06-21 22:07:22,029 INFO L125 PetriNetUnfolderBase]: For 648102/648110 co-relation queries the response was YES. [2024-06-21 22:07:22,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74041 conditions, 8348 events. 5360/8348 cut-off events. For 648102/648110 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 51561 event pairs, 1199 based on Foata normal form. 12/8359 useless extension candidates. Maximal degree in co-relation 73839. Up to 7895 conditions per place. [2024-06-21 22:07:22,190 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 526 selfloop transitions, 130 changer transitions 0/659 dead transitions. [2024-06-21 22:07:22,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 659 transitions, 14241 flow [2024-06-21 22:07:22,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:07:22,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:07:22,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-21 22:07:22,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 22:07:22,192 INFO L175 Difference]: Start difference. First operand has 439 places, 631 transitions, 12411 flow. Second operand 7 states and 119 transitions. [2024-06-21 22:07:22,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 659 transitions, 14241 flow [2024-06-21 22:07:24,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 659 transitions, 13443 flow, removed 46 selfloop flow, removed 11 redundant places. [2024-06-21 22:07:24,473 INFO L231 Difference]: Finished difference. Result has 435 places, 637 transitions, 11995 flow [2024-06-21 22:07:24,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11613, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11995, PETRI_PLACES=435, PETRI_TRANSITIONS=637} [2024-06-21 22:07:24,474 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 394 predicate places. [2024-06-21 22:07:24,474 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 637 transitions, 11995 flow [2024-06-21 22:07:24,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:24,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:07:24,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:07:24,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 22:07:24,475 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:07:24,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:07:24,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1126423745, now seen corresponding path program 7 times [2024-06-21 22:07:24,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:07:24,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339298531] [2024-06-21 22:07:24,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:07:24,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:07:24,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:07:25,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:07:25,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:07:25,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339298531] [2024-06-21 22:07:25,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339298531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:07:25,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:07:25,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:07:25,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093385241] [2024-06-21 22:07:25,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:07:25,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:07:25,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:07:25,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:07:25,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:07:25,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:07:25,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 637 transitions, 11995 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:25,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:07:25,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:07:25,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:07:27,823 INFO L124 PetriNetUnfolderBase]: 5348/8343 cut-off events. [2024-06-21 22:07:27,824 INFO L125 PetriNetUnfolderBase]: For 644211/644215 co-relation queries the response was YES. [2024-06-21 22:07:27,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71374 conditions, 8343 events. 5348/8343 cut-off events. For 644211/644215 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 51826 event pairs, 1540 based on Foata normal form. 8/8350 useless extension candidates. Maximal degree in co-relation 71175. Up to 7887 conditions per place. [2024-06-21 22:07:27,957 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 524 selfloop transitions, 135 changer transitions 0/662 dead transitions. [2024-06-21 22:07:27,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 662 transitions, 13577 flow [2024-06-21 22:07:27,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:07:27,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:07:27,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 22:07:27,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392857142857143 [2024-06-21 22:07:27,958 INFO L175 Difference]: Start difference. First operand has 435 places, 637 transitions, 11995 flow. Second operand 7 states and 123 transitions. [2024-06-21 22:07:27,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 662 transitions, 13577 flow [2024-06-21 22:07:30,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 662 transitions, 13383 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-21 22:07:30,535 INFO L231 Difference]: Finished difference. Result has 438 places, 637 transitions, 12110 flow [2024-06-21 22:07:30,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11803, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12110, PETRI_PLACES=438, PETRI_TRANSITIONS=637} [2024-06-21 22:07:30,535 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 397 predicate places. [2024-06-21 22:07:30,535 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 637 transitions, 12110 flow [2024-06-21 22:07:30,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:30,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:07:30,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:07:30,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 22:07:30,564 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:07:30,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:07:30,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1113525575, now seen corresponding path program 8 times [2024-06-21 22:07:30,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:07:30,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841379998] [2024-06-21 22:07:30,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:07:30,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:07:30,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:07:31,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:07:31,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:07:31,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841379998] [2024-06-21 22:07:31,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841379998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:07:31,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:07:31,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:07:31,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139215044] [2024-06-21 22:07:31,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:07:31,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:07:31,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:07:31,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:07:31,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:07:31,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:07:31,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 637 transitions, 12110 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:31,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:07:31,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:07:31,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:07:33,667 INFO L124 PetriNetUnfolderBase]: 5336/8327 cut-off events. [2024-06-21 22:07:33,667 INFO L125 PetriNetUnfolderBase]: For 632821/632825 co-relation queries the response was YES. [2024-06-21 22:07:33,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70915 conditions, 8327 events. 5336/8327 cut-off events. For 632821/632825 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 51765 event pairs, 1558 based on Foata normal form. 8/8334 useless extension candidates. Maximal degree in co-relation 70716. Up to 8047 conditions per place. [2024-06-21 22:07:34,023 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 549 selfloop transitions, 106 changer transitions 0/658 dead transitions. [2024-06-21 22:07:34,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 658 transitions, 13506 flow [2024-06-21 22:07:34,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:07:34,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:07:34,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-21 22:07:34,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45416666666666666 [2024-06-21 22:07:34,024 INFO L175 Difference]: Start difference. First operand has 438 places, 637 transitions, 12110 flow. Second operand 6 states and 109 transitions. [2024-06-21 22:07:34,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 658 transitions, 13506 flow [2024-06-21 22:07:36,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 658 transitions, 13256 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-21 22:07:36,427 INFO L231 Difference]: Finished difference. Result has 437 places, 637 transitions, 12155 flow [2024-06-21 22:07:36,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11860, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=12155, PETRI_PLACES=437, PETRI_TRANSITIONS=637} [2024-06-21 22:07:36,428 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 396 predicate places. [2024-06-21 22:07:36,428 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 637 transitions, 12155 flow [2024-06-21 22:07:36,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:36,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:07:36,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:07:36,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 22:07:36,433 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:07:36,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:07:36,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1210618760, now seen corresponding path program 1 times [2024-06-21 22:07:36,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:07:36,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761772101] [2024-06-21 22:07:36,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:07:36,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:07:36,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:07:37,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:07:37,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:07:37,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761772101] [2024-06-21 22:07:37,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761772101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:07:37,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:07:37,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:07:37,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375414229] [2024-06-21 22:07:37,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:07:37,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:07:37,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:07:37,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:07:37,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:07:37,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 22:07:37,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 637 transitions, 12155 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:37,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:07:37,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 22:07:37,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:07:39,734 INFO L124 PetriNetUnfolderBase]: 5245/8246 cut-off events. [2024-06-21 22:07:39,735 INFO L125 PetriNetUnfolderBase]: For 660113/660167 co-relation queries the response was YES. [2024-06-21 22:07:39,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70901 conditions, 8246 events. 5245/8246 cut-off events. For 660113/660167 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 51890 event pairs, 1906 based on Foata normal form. 9/8221 useless extension candidates. Maximal degree in co-relation 70703. Up to 7854 conditions per place. [2024-06-21 22:07:39,861 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 555 selfloop transitions, 43 changer transitions 0/669 dead transitions. [2024-06-21 22:07:39,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 669 transitions, 13701 flow [2024-06-21 22:07:39,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:07:39,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:07:39,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-21 22:07:39,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-06-21 22:07:39,862 INFO L175 Difference]: Start difference. First operand has 437 places, 637 transitions, 12155 flow. Second operand 9 states and 147 transitions. [2024-06-21 22:07:39,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 669 transitions, 13701 flow [2024-06-21 22:07:42,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 669 transitions, 13387 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 22:07:42,236 INFO L231 Difference]: Finished difference. Result has 440 places, 643 transitions, 12024 flow [2024-06-21 22:07:42,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11841, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=597, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12024, PETRI_PLACES=440, PETRI_TRANSITIONS=643} [2024-06-21 22:07:42,238 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 399 predicate places. [2024-06-21 22:07:42,238 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 643 transitions, 12024 flow [2024-06-21 22:07:42,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:42,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:07:42,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:07:42,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 22:07:42,238 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:07:42,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:07:42,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1692143758, now seen corresponding path program 1 times [2024-06-21 22:07:42,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:07:42,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391539835] [2024-06-21 22:07:42,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:07:42,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:07:42,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:07:42,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:07:42,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:07:42,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391539835] [2024-06-21 22:07:42,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391539835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:07:42,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:07:42,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:07:42,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554760135] [2024-06-21 22:07:42,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:07:42,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:07:42,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:07:42,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:07:42,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:07:42,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:07:42,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 643 transitions, 12024 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:42,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:07:42,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:07:42,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:07:45,436 INFO L124 PetriNetUnfolderBase]: 5369/8365 cut-off events. [2024-06-21 22:07:45,436 INFO L125 PetriNetUnfolderBase]: For 626700/626704 co-relation queries the response was YES. [2024-06-21 22:07:45,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71682 conditions, 8365 events. 5369/8365 cut-off events. For 626700/626704 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 51845 event pairs, 1581 based on Foata normal form. 6/8370 useless extension candidates. Maximal degree in co-relation 71483. Up to 8264 conditions per place. [2024-06-21 22:07:45,562 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 629 selfloop transitions, 44 changer transitions 0/676 dead transitions. [2024-06-21 22:07:45,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 676 transitions, 13621 flow [2024-06-21 22:07:45,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:07:45,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:07:45,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 135 transitions. [2024-06-21 22:07:45,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 22:07:45,564 INFO L175 Difference]: Start difference. First operand has 440 places, 643 transitions, 12024 flow. Second operand 9 states and 135 transitions. [2024-06-21 22:07:45,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 676 transitions, 13621 flow [2024-06-21 22:07:47,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 676 transitions, 13533 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 22:07:47,991 INFO L231 Difference]: Finished difference. Result has 446 places, 656 transitions, 12262 flow [2024-06-21 22:07:47,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11936, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=600, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12262, PETRI_PLACES=446, PETRI_TRANSITIONS=656} [2024-06-21 22:07:47,992 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 405 predicate places. [2024-06-21 22:07:47,992 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 656 transitions, 12262 flow [2024-06-21 22:07:47,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:47,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:07:47,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:07:47,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 22:07:47,993 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:07:47,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:07:47,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1964167604, now seen corresponding path program 2 times [2024-06-21 22:07:47,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:07:47,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121141269] [2024-06-21 22:07:47,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:07:47,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:07:48,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:07:48,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:07:48,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:07:48,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121141269] [2024-06-21 22:07:48,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121141269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:07:48,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:07:48,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:07:48,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935273999] [2024-06-21 22:07:48,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:07:48,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:07:48,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:07:48,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:07:48,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:07:49,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 22:07:49,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 656 transitions, 12262 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:49,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:07:49,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 22:07:49,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:07:51,490 INFO L124 PetriNetUnfolderBase]: 5264/8273 cut-off events. [2024-06-21 22:07:51,491 INFO L125 PetriNetUnfolderBase]: For 687322/687376 co-relation queries the response was YES. [2024-06-21 22:07:51,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72377 conditions, 8273 events. 5264/8273 cut-off events. For 687322/687376 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 52061 event pairs, 1895 based on Foata normal form. 8/8248 useless extension candidates. Maximal degree in co-relation 72174. Up to 7933 conditions per place. [2024-06-21 22:07:51,631 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 574 selfloop transitions, 35 changer transitions 0/680 dead transitions. [2024-06-21 22:07:51,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 680 transitions, 13836 flow [2024-06-21 22:07:51,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:07:51,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:07:51,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-21 22:07:51,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37777777777777777 [2024-06-21 22:07:51,633 INFO L175 Difference]: Start difference. First operand has 446 places, 656 transitions, 12262 flow. Second operand 9 states and 136 transitions. [2024-06-21 22:07:51,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 680 transitions, 13836 flow [2024-06-21 22:07:54,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 680 transitions, 13705 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-21 22:07:54,183 INFO L231 Difference]: Finished difference. Result has 451 places, 662 transitions, 12342 flow [2024-06-21 22:07:54,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12131, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=621, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12342, PETRI_PLACES=451, PETRI_TRANSITIONS=662} [2024-06-21 22:07:54,183 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 410 predicate places. [2024-06-21 22:07:54,183 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 662 transitions, 12342 flow [2024-06-21 22:07:54,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:54,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:07:54,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:07:54,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 22:07:54,184 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:07:54,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:07:54,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1387348838, now seen corresponding path program 2 times [2024-06-21 22:07:54,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:07:54,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370213392] [2024-06-21 22:07:54,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:07:54,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:07:54,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:07:54,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:07:54,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:07:54,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370213392] [2024-06-21 22:07:54,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370213392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:07:54,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:07:54,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:07:54,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131115813] [2024-06-21 22:07:54,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:07:54,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:07:54,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:07:54,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:07:54,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:07:54,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:07:54,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 662 transitions, 12342 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:54,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:07:54,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:07:54,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:07:57,399 INFO L124 PetriNetUnfolderBase]: 5420/8436 cut-off events. [2024-06-21 22:07:57,399 INFO L125 PetriNetUnfolderBase]: For 667078/667082 co-relation queries the response was YES. [2024-06-21 22:07:57,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73613 conditions, 8436 events. 5420/8436 cut-off events. For 667078/667082 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 52324 event pairs, 1587 based on Foata normal form. 6/8441 useless extension candidates. Maximal degree in co-relation 73408. Up to 8273 conditions per place. [2024-06-21 22:07:57,523 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 632 selfloop transitions, 60 changer transitions 0/695 dead transitions. [2024-06-21 22:07:57,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 695 transitions, 14223 flow [2024-06-21 22:07:57,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:07:57,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:07:57,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 22:07:57,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396875 [2024-06-21 22:07:57,524 INFO L175 Difference]: Start difference. First operand has 451 places, 662 transitions, 12342 flow. Second operand 8 states and 127 transitions. [2024-06-21 22:07:57,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 695 transitions, 14223 flow [2024-06-21 22:07:59,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 695 transitions, 14137 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 22:07:59,717 INFO L231 Difference]: Finished difference. Result has 454 places, 674 transitions, 12642 flow [2024-06-21 22:07:59,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12256, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=609, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12642, PETRI_PLACES=454, PETRI_TRANSITIONS=674} [2024-06-21 22:07:59,718 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 413 predicate places. [2024-06-21 22:07:59,718 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 674 transitions, 12642 flow [2024-06-21 22:07:59,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:59,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:07:59,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:07:59,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 22:07:59,719 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:07:59,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:07:59,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1113333220, now seen corresponding path program 1 times [2024-06-21 22:07:59,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:07:59,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617731119] [2024-06-21 22:07:59,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:07:59,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:07:59,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:00,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:08:00,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:00,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617731119] [2024-06-21 22:08:00,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617731119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:00,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:00,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:08:00,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443951996] [2024-06-21 22:08:00,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:00,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:08:00,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:00,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:08:00,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:08:00,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 22:08:00,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 674 transitions, 12642 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:00,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:00,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 22:08:00,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:03,388 INFO L124 PetriNetUnfolderBase]: 5417/8444 cut-off events. [2024-06-21 22:08:03,388 INFO L125 PetriNetUnfolderBase]: For 680466/680466 co-relation queries the response was YES. [2024-06-21 22:08:03,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73923 conditions, 8444 events. 5417/8444 cut-off events. For 680466/680466 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 52494 event pairs, 1957 based on Foata normal form. 1/8444 useless extension candidates. Maximal degree in co-relation 73717. Up to 8350 conditions per place. [2024-06-21 22:08:03,518 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 655 selfloop transitions, 27 changer transitions 0/685 dead transitions. [2024-06-21 22:08:03,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 685 transitions, 14056 flow [2024-06-21 22:08:03,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 22:08:03,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 22:08:03,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 85 transitions. [2024-06-21 22:08:03,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 22:08:03,519 INFO L175 Difference]: Start difference. First operand has 454 places, 674 transitions, 12642 flow. Second operand 5 states and 85 transitions. [2024-06-21 22:08:03,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 685 transitions, 14056 flow [2024-06-21 22:08:06,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 685 transitions, 13876 flow, removed 70 selfloop flow, removed 3 redundant places. [2024-06-21 22:08:06,245 INFO L231 Difference]: Finished difference. Result has 456 places, 674 transitions, 12537 flow [2024-06-21 22:08:06,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12462, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=647, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=12537, PETRI_PLACES=456, PETRI_TRANSITIONS=674} [2024-06-21 22:08:06,246 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 415 predicate places. [2024-06-21 22:08:06,246 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 674 transitions, 12537 flow [2024-06-21 22:08:06,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:06,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:06,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:06,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 22:08:06,247 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:08:06,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:06,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1120698262, now seen corresponding path program 3 times [2024-06-21 22:08:06,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:06,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314779123] [2024-06-21 22:08:06,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:06,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:06,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:07,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:08:07,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:07,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314779123] [2024-06-21 22:08:07,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314779123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:07,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:07,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:08:07,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939012684] [2024-06-21 22:08:07,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:07,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:08:07,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:07,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:08:07,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:08:07,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 22:08:07,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 674 transitions, 12537 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:07,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:07,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 22:08:07,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:09,797 INFO L124 PetriNetUnfolderBase]: 5293/8314 cut-off events. [2024-06-21 22:08:09,798 INFO L125 PetriNetUnfolderBase]: For 718821/718848 co-relation queries the response was YES. [2024-06-21 22:08:09,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73368 conditions, 8314 events. 5293/8314 cut-off events. For 718821/718848 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 52280 event pairs, 1900 based on Foata normal form. 9/8290 useless extension candidates. Maximal degree in co-relation 73160. Up to 7962 conditions per place. [2024-06-21 22:08:09,932 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 592 selfloop transitions, 30 changer transitions 0/695 dead transitions. [2024-06-21 22:08:09,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 695 transitions, 13883 flow [2024-06-21 22:08:09,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:08:09,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:08:09,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 22:08:09,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 22:08:09,933 INFO L175 Difference]: Start difference. First operand has 456 places, 674 transitions, 12537 flow. Second operand 7 states and 120 transitions. [2024-06-21 22:08:09,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 695 transitions, 13883 flow [2024-06-21 22:08:12,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 695 transitions, 13809 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 22:08:12,653 INFO L231 Difference]: Finished difference. Result has 459 places, 674 transitions, 12533 flow [2024-06-21 22:08:12,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12463, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=644, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12533, PETRI_PLACES=459, PETRI_TRANSITIONS=674} [2024-06-21 22:08:12,654 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 418 predicate places. [2024-06-21 22:08:12,654 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 674 transitions, 12533 flow [2024-06-21 22:08:12,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:12,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:12,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:12,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 22:08:12,655 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:08:12,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:12,655 INFO L85 PathProgramCache]: Analyzing trace with hash -148513590, now seen corresponding path program 1 times [2024-06-21 22:08:12,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:12,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669909705] [2024-06-21 22:08:12,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:12,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:12,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat